Dredge valves manufactured & delivered

Dredge Yard specializes not only in small to medium sized dredgers, but also dredging and mining components. Accordingly, one of our most recent projects involved manufacturing and delivery of dredge valves. More specifically, dredge valves of 800 mm internal diameter. They will be used as a replacement of existing valves on board a trailing suction hopper dredger (TSHD). These types of dredge valves can be produced for three different working duties varying between 10, 20 and 30 bar according to the client’s requirements and application.

Dredge valves are used to control the flow of water and sand in the suction and discharge pipes of cutter suction dredgers or TSHDs. Due to demanding work function and exposure to abrasive slurry materials, dredge gate valves are highly sophisticated components. Therefore,  it is important to select robust material and high pressure handling capability to ensure proper function and long component life.

Design

All of our components, including dredge valves, are continuously developed and designed by our in-house team of engineers using the latest design software. In this way, we can guarantee high quality and durability of components.

Dredge Valve Manufacturing by Dredge Yard

Dredge Valve Manufacturing by Dredge Yard

We fabricate dredge valve body from high tensile steel, while the valve’s gate is made of corrosion resistant and hardened steel. These materials protect the valve against rust and wear. Additionally, high quality marine type paint is applied, for conservation of the outer surface, in order to protect the valve against corrosion.

Another special feature of our valves is the steel reinforced rubber seals. This makes the seal very durable, allowing it to handle large amounts of abrasive slurry, as well as to open and close smoothly, even in the toughest working conditions. Additionally, our dredge valves are designed in a way, where no fasteners inside the body can loosen and damage other parts during operation, even in tough conditions.

Dredge Valve by Dredge Yard before paint

Dredge Valve by Dredge Yard before paint

Aside from using robust materials, we always design easily maintained equipment for long-lasting life. For example, all connections outside the dredge valve body are bolts and nuts that can be easily replaced without damaging any part of the body. Furthermore, two inspection holes on both sides of the dredge valve allow for easy inspection inside the dredge valve body, without the need to dismantle it.

Find more information about our dredge valves here, or contact us!

Contact Us 

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Auger ECO 200 sold from stock: testing

Dredge Yard specializes in small to medium sized dredgers. Our standard equipment is available from stock and can be customized for special projects and applications.

In March, our standard Auger dredger ECO 200 was purchased from stock. Auger ECO 200 is a compact and economic sediment dredger. Due to its precision and low turbidity, it is especially suitable for environmental dredging applications, which involve contaminants. In addition to this, it can also efficiently remove accumulated sediments in water sources such as rivers, streams, harbours or lakes.

Auger ECO 200 client inspection

Auger ECO 200 client inspection

Auger ECO 200 testing

Recently, we welcomed our clients to inspect and test their new Auger ECO 200. Some of the functionalities that were inspected during testing are described below.

  • Dredge pump discharge
    The performance of submerged, hydraulically driven dredge pump is checked and the discharge pressure is measured
  • Auger screw rotation
    Auger screw rotation is inspected both – clock wise and counter clock wise at variable speed
  • Hydrostatic stability
    Free board measured at fore end, mid-section and aft end during operation and sailing position
  • Propulsion system
    Performance and testing of forward and backward movement, as well as left and right maneuvering
  • Cabin controls
    All dredging operation controls and cabin controls are checked. This includes flood lights, cabin lights, exhaust fan, wipers, air-condition, etc.

Following a successful inspection, dredger is soon on its way to the client and its final destination.

Take a look at our Auger dredger ECO 200 testing in the video below:

More details about the client & their dredging operation coming soon, directly from dredging site. Follow us on Facebook, Twitter & LinkedIn to see our latest news and updates!

Contact Dredge Yard

If you would like more information or advice, please fill in the form below. We are happy to help!

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Inside Dredge Yard: history, ambition & innovation

Today Dredge Yard is among the leading manufacturers and suppliers of small to medium sized dredging equipment and components. But where and how did our journey begin and what does the future have in store? What are some of our biggest ambitions? Read on.

Where it all started

Our CEO Basel Yousef had been gathering experience within the dredging industry all around the world before settling in Rotterdam. Before Dredge Yard came to life, Basel had lived in Shanghai, which houses the biggest port in the world, Haarlem and Dubai, where the story of our company really begins.

Basel Yousef at Dredging Exhibition

Dredge Yard CEO Basel Yousef

In Dubai, Basel worked for a Dutch company, as a general manager of the middle east. Yet, this occupation could not fulfil constant need for new challenges and thirst for innovation. This led to a new chapter, and a real challenge – starting his own company in 2011. At this time, Dubai offered a lot of fast progress for the newfound dredging company. This was due to ongoing real estate and tourism related construction projects. Despite the newfound success, thirst for new challenges didn’t stop there.

Search for challenge in the Netherlands

This time, the centre of ports, dredging and shipbuilding – the Netherlands was calling. Basel says that he chose this country because of its relevancy to maritime, shipbuilding and dredging industries. Furthermore, he also sees Netherlands as a home to many highly educated people and universities within these fields. Additionally, many technological companies are based here, which offer great opportunities for development and innovation of the equipment that is at the core of Dredge Yard company.

 

Rotterdam – home to many international, tech companies and the biggest port in Europe is the perfect place for Dredge Yard

 

And that’s how in 2016, just 5 years after starting the company, Basel and Dredge Yard moved to the Netherlands. To begin with, the company was situated in Sliedrecht. But eventually, in 2018, Rotterdam, housing the biggest port of Europe and many international companies, turned out to be “the perfect place for us” (Basel Yousef, CEO).

While the headquarters settled in Rotterdam, our engineering office is still located in Dubai.

Dredge Yard Office Dubai

Dredge Yard’s Office in Dubai

Our great team of engineers in Dubai were part of Dredge Yard from the very beginning. They know our equipment to the smallest screw and are on-board with our strong company values. Because of this, and our dredging projects all around the world, Dredge Yard team can still be found on-the-go a lot, anywhere from Middle East and Asia, to Africa.

Company vision: environment, client & safety

Dredge Yard’s vision is to see a world where dredging operations are safe for both – people involved and the surrounding environment. Therefore, our focus is not only on manufacturing and supplying equipment, but also on the constant improvement and development of innovative digging instruments.

Environment

We strive for environmentally friendly solutions of highest efficiency. Our equipment should be used to improve the environment and standard of living. At the same time, it should not cause negative impact on living conditions under water and surrounding habitats. This is why we focus on our dredger series ECO. Among other advantages, ECO dredgers have lower fuel consumption, and thus, release less CO2.

Cutter Suction Dredger 200 in Water

Dredge Yard’s Cutter Suction Dredger Operating in Dubai

This makes the ECO series a more environmentally friendly solution compared to large vessels that require large amounts of fuel.

 

We want to see a world where dredging operations are safe for both – people involved and the surrounding environment.

 

In addition to this, we promote durable, quality equipment and its regular maintenance, to ensure long dredger life and avoid frequent equipment disposal, which harms nature.

Client needs

Aside from environment, our focus is naturally, on client needs. Dredge Yard is known as an agile company, which is extremely flexible and fast. We try to respond to all inquiries on the same day to advice customers, who are often in a hurry to find the ideal equipment.

 

Dredging is an activity, which is unique to its environment (…) we believe that every project requires a different solution and we are here to adapt to it.

 

Furthermore, our standard engineering projects can always be adapted to the wishes of the customer. We strive to provide adapted dredger designs and drawings within a few days of the received inquiry (depending on the complexity of the project).

Dredge Yard Component Inspection

Dredging Component Inspection By Dredge Yard Team

Dredging is an activity, which is unique to its environment from soil types to weather and hydrographical conditions. Therefore, we believe that every project requires a different solution and we are here to adapt to it.

Safety

Finally, we are committed to promote safety in the dredging industry. We do our best to ensure safety for those who will be operating our dredgers. Therefore, we provide on-site crew training on how to operate and maintain an ECO dredger.

 

We have a vision of a dredging industry, which offers a safe, healthy, accident-free work place.

 

Training includes overseeing launch of the dredger; dredge operation and performance optimization training; dredger check-up & maintenance training.

Dregde Yard's Auger Dredger Inspection

Auger Dredger Inspection by Dredge Yard Team and Clients

Overall, we think it is important to always keep in close contact with the client after delivery – whether it is for technical support, maintenance, training or any other needs.

Dredge Yard’s future aspirations

We have a vision of a dredging industry, which offers a safe, healthy, accident-free work place. It improves the environment and living standards, without causing harm to the surrounding habitats and nature. While striving for this, we have already introduced our environmentally friendly take on an auger head – the adaptive auger head system and continuously optimized ECO dredger series.

Currently, we are developing new dredging solutions and components for improved safety, efficiency and nature protection. But more on that, later in the year. Follow Dredge Yard’s newest updates and product releases on Facebook, Twitter and LinkedIn!

Contact Dredge Yard

If you would like more information or advice, please fill in the form below. We are happy to help!

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We are hiring: Project Coordinator

We are looking to expand our team with a proactive, enthusiastic and organized project coordinator looking to start their career in a small manufacturing company, which specializes in dredging and mining equipment.

Job description

As our project coordinator, you will be responsible for an overview and coordination of the company’s running projects. This includes overseeing and managing all activity from client’s order placement to final delivery of the product according to agreed budget, timeline and delivery terms.

The ideal candidate is proactive, has strong organizational and management skills. He/she can effectively monitor and present project status and updates to relevant stakeholders, clients and other project team members, as well as cooperate with relevant suppliers worldwide.

Main Responsibilities

  • Set up and maintain project planning and execution
  • Set up and monitor project costs
  • Quality control of all products
  • When requested, be in charge of inspection and testing of products
  • Monitor product packaging and delivery according to LPO agreements
  • Deliver all documentation requested by the clients
  • Regularly update clients and project team members on the project progress

Requirements

  • Relevant, technical education (e.g. mechanical engineering)
  • Relevant work experience is a plus
  • Strong communication and organizational skills
  • Excellent command of English, both spoken and written
  • Based in or around Rotterdam
  • Willing to travel within and outside Europe

Contact Us 

If you think you would be a great fit for this position, please send your CV and a short cover letter to viktorija@dredgeyard.com.

Dredge Ball Joint Functional Test: video

Dredge Yard specializes in manufacturing and supplying of dredgers and dredging components. Dredge ball joint is one of the component types we specialize in. Our manufacturing process takes place in the Republic of Turkey. It includes casting and heat treatment of all components, followed by machining to the finest tolerances.

We always conduct heavy duty functional tests, in order to ensure dredging equipment of the highest quality. One of such tests is called the dynamic dredge ball joint test. During the dynamic test, dredge ball joints are tested at a pressure, which is above the required design operating pressure. Additionally, while the ball joint is pressurized, a hydraulic cylinder applies a movement of the ball joint. This is done to simulate the working conditions in the dredge field at the most severe conditions. Severe conditions can include strong currents and waves, maximum dredge pipe length and highest pressure that the dredger can achieve. Therefore, the dynamic test is done to ensure component durability under all circumstances.

In February 2019, Dredge Yard delivered 50 dredge ball joints to the United Arab Emirates. These ball joints were suitable for a pipe with internal diameter of 750mm and discharge pressure of 30 bar. Therefore, during testing, we pressurized the ball joints to over 30 bar, in order to ensure that they can withstand maximum forces.

The video below provides an insight into our dredge ball joint dynamic test:

 

All About Dredging & The Environment

Dredging environmental impact

Dredging is often associated with pollution, contaminated soils, CO2 emissions or other negative environmental impact. Yet, the positive perspective and nature improvements dredging can achieve are often overlooked. The word “dredge” itself is defined as the act of cleaning and clearing “the bed of (a harbour, river, or other area of water) by scooping out mud, weeds, and rubbish with a dredge” by Oxford Dictionary.

Accordingly, dredging is an activity, which to a large extent focuses on improvement of our society, businesses and even the environment itself. Furthermore, due to constant environmental and societal developments such as climate change, population growth and pollution, dredging is becoming an increasingly important protective process.

How can dredging improve the environment?

While there is a variety of dredging objectives, a large range of applications focus on improvement of the environment and nature protection. Some of these applications are discussed below.

Dredging rivers to prevent flooding

Due to natural weathering and erosion, sand, silt and debris are constantly washed downstream. Sediments gradually fill up rivers, channels or canals making them very shallow and creating blockage. As a result, waterways become inaccessible to ships. Furthermore, blockage can cause water to flow over the river banks, flooding the surrounding area. Therefore, shallow waters can have major impacts on local businesses and even become a safety hazard to the surrounding residents and wildlife.

River dredging is an example of an application with the objective of nature protection. It ensures not only waterway accessibility for ships, but also protection and safety of people and wildlife in the area.

Environmental dredging to clean contaminated soils

channel dredging landscape

Currently, one of the bigger issues that waterways face are polluted and contaminated soils, which become an environmental threat. Contaminated soils can negatively affect the environment and its inhabitants. In this case, environmental dredging is an effective method to remove polluted sediments. The soils must be cleaned in a controlled and precise manner, without spreading the pollutants in the surroundings. Accordingly, dredging solutions are continuously evolved to ensure precise dredging, which will not harm the environment or the operators involved.

Mine tailing removal for environmental safety

Dredge Yard mine tailing removal dredging landscape

Mining operations such as coal or gold mining can produce tailings, which are finely crushed rock and mineral byproducts of the operations. Tailings often contain leftover chemicals, which can be dangerous and must be regularly cleaned to not harm the environment. Storage and handling of tailings has become a major environmental issue worldwide, where dredging is an effective solution to protect the surrounding environment.

Dredging reservoirs for clean & safe water supply

Reservoir, lake & dam dredging landscape

Dams, reservoirs and lakes play an important role in our society. They provide power and drinking water, as well as act as an energy source and habitat for various plants and animals.  Just as in rivers, natural weathering, erosion and pollution threaten these water resources by clogging them up. Sediments can also contain chemical precipitates, which are especially harmful to the environment and life. This is another example, where dredging provides an effective solution to ensure clean, safe and sufficient water supply for the environment and life within it.

Environmental precautions when dredging

As discussed above, dredging is often an efficient solution to cleaning and improving the environment. Nevertheless, some aspects of these dredging projects must be considered in order to ensure minimal negative impacts on the nature.

Dredging equipment

all dredger engineered design

When it comes to dredging equipment – size matters, and bigger is not always better. In the dredging industry – dredger types & sizes vary from one-container-transportable ECO 150s to grandiose vessels, such as the Spartacus. It is immensely important to evaluate project conditions and choose the right equipment for your dredging project. An undersized dredger will not fulfil project requirements and can ultimately lead to additional costs. Choosing oversized equipment can unnecessarily break the budget. Furthermore, naturally, larger equipment requires more power and thus, has higher fuel consumption, which results in increased COemissions. Therefore, aside from increased expenses, choosing oversized equipment can also needlessly harm the environment.

Types of dredging methods

Choosing the right equipment goes hand in hand with the right dredging method. Some dredging methods can be considered more environmentally friendly than others. Thus, it is important to evaluate what is the most sufficient method for both – project requirements and environmental conditions.

Water Injection Dredging Diagram

Water Injection dredging is one example of the more environmentally friendly dredging solutions. One of the key aspects of this method is the fact that it involves nature itself in the dredging process by using water currents for material transportation. Additionally, water injection dredging does not involve material removal from the ecosystem. This contributes to sustainability of natural ecosystems that are vital in natural waterway processes.

There are also a variety of economic advantages of this dredging method, though it requires very specific environmental conditions to be sufficient. Find more about water injection dredging here.

Dredged material as a resource

cutter suction dredger 200 production

Whenever dredged material does not involve any pollutants, it should be considered as a valuable resource, which can easily be reused. Dredged, clean sediment can be used for a variety of different applications such as beach nourishment, land reclamation, soil improvement, construction materials and more. Multiple dredging projects with different objectives (e.g. maintenance and capital dredging) are often combined in order to achieve the highest benefit of the project. In this way, the environment is protected from immense impact of unnecessarily many dredging activities. Additionally, if not reused, dredged material is simply disposed of. This is an expensive solution, which can also harm the environment and habitats in the disposal areas.

ECO-friendly equipment

There is a variety of nature-friendly dredging objectives and precautions that can be taken to protect the environment. Nevertheless, it cannot be denied that dredging has certain negative impacts, as it is a form of interference with the ecosystem. Due to this, the dredging industry is increasingly focusing on new, innovative and green solutions, which would minimize any harm to the environment.

Adaptive auger head

adaptive auger head dredger

One of such ECO-friendly solutions is the adaptive auger head. Dredge Yard introduced the adaptive auger head system, which due to a strong suction vacuum, closely follows the ground when dredging. As a result, the adaptive auger head protects the marine animals from entering the suction system. It also causes minimal to no turbidity and accurately removes even the thinnest layers of sediment. Therefore, it is not only protective of the marine animals, but also of the general environment, especially when contaminated sediments are involved.

Additionally, our Auger dredger ECO 200 is equipped with the ECO-friendly system for environmental dredging. However, the adaptive auger head can also be purchased separately to upgrade existing dredgers. In this way, it can increase dredger efficiency, protect the environment and prolong your existing dredger life.

Water Injection ECO 150

Water Injection Dredger 150 3D model

Water Injection dredger ECO 150 is a compact dredger ideal for silt dredging and other small maintenance projects. It is eco-friendly due to its low CO2 emissions and water injection method, which does not involve material removal from the ecosystem.

Spare parts

All dredge ball joints

As an additional service, Dredge Yard offers dredge components from stock. We want to encourage maintenance, upgrading and modification of durable dredgers for a variety of applications. In this way, overproduction and rapid equipment disposal can be avoided.

Green(er) Future

Dredge Yard strives for a greener future, where dredging will not cause any negative impacts on the nature and its inhabitants. Therefore, we are constantly researching the newest technologies in order to design and engineer more efficient, greener dredging solutions.

Follow us on LinkedIn, Twitter & Facebook or company updates, latest posts on various dredging topics & our new dredging technologies!

Contact Dredge Yard

If you would like more information or advice, please contact us here, or fill in the form below. We are happy to help! 

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Environmentally Friendly solution: Adaptive Auger Head

At Dredge Yard, we pay special attention to high efficiency and innovative solutions. We do this, to achieve lowest equipment prices, operational costs and minimal impact on the environment. Sustainability and green dredging solutions become increasingly important, as climate and environment are rapidly changing and must be protected. In accordance to this, our team created an innovative dredging solution, which protects the environment – the adaptive auger head. 

Specifications

The adaptive auger head has two retractable visors placed on the front, and the backside of the auger head. The visors move in and out, according to the shape of the seabed and the depth. This automatic visor movement is enabled by the hydraulic arrangement and pressure settings. See the video below for a thorough explanation of how the adaptive auger head works. 

Benefits of the adaptive auger head

The adaptive auger head achieves a variety of environmental and economic benefits, due to its automatic visor movement along the ground when dredging. Some of the benefits include:

  1. More production of sand in less time. The adaptive visors create a strong suction vacuum by continuously following the ground, which achieves high production rates.
  2. Much less turbidity than with conical (basket) cutter head types. This is achieved due to adaptive visors, which control the material spillage. Low turbidity is an especially big advantage when dredging in contaminated areas, as it protects the environment. 
  3. The adaptive system saves marine life by protecting animals from entering the suction system in the dredger.
  4. This system accurately removes only the necessary layer and ensures an even surface at all depths. Therefore, necessary materials are not removed from the ecosystem.
  5. It is suitable for unmanned dredging, because adaptive visors automatically adjust with the ground. This makes the system very useful for remote controlled dredgers, which operate in areas that are risky for operators. 

Remediation / environmental dredging

Environmental Dredging Landscape

The adaptive auger head is an especially suitable solution for environmental dredging. As mentioned, the adaptive visors protect the marine life from getting trapped in the dredging system. Additionally, they cause minimal to no turbidity. This characteristic is vital for the ecosystem, especially when contaminated soils are involved. Some of the other advantages of using the adaptive auger head system in environmental or remediation dredging are discussed below. 

  1. Adaptive auger head improves cleanup operations that are specifically aimed at removing contaminated sediments. This is especially important, as contaminants can endanger marine and human life.
  2. Remediation dredging means that the thinnest layers possible are accurately removed. As a result, the least possible quantities of contaminated material are dredged.
  3. Contaminated sediments pose a big risk to human health, the environment and may limit the use of many water bodies. However, treatment of contaminated sediment is costly and secure disposal areas are limited. Therefore, precision dredging offers a viable solution, as it removes the smallest amount possible. 
  4. The adaptive visors enclose the area being dredged. In this way, they prevent sediments from drifting into the surrounding waters. 

Other applications for the adaptive auger head

adaptive auger head dredger

Adaptive auger head on dredger ECO 200

Aside from environmental dredging, the adaptive auger head can be used for a variety of applications. For example, it is a useful tool in river and canal dredging, water intake cleaning, harbor maintenance and more. 

Overall, not all types of dredging or maintenance have to be very precise. However, certain projects demand environmental society clearance. In such cases, the adaptive auger head adds immense value to your product in terms of both – economic reasons for you and protection of the environment. We offer Auger dredger ECO 200, which features our adaptive auger head system. Additionally, the adaptive auger head can also be purchased separately, in order to upgrade your existing dredger. 

Contact Dredge Yard

If you would like more information or advice, please contact us here, or fill in the form below. We are happy to help! 

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More photos of the adaptive auger head

 

50 dredge ball joints: Manufactured, Tested, Delivered

As one of the first projects of 2019, Dredge Yard successfully delivered 50 heavy duty dredge ball joints to the Middle East for immediate use in the gulf region. These dredge ball joints are suitable for a thick pipe with internal diameter of 750mm at continuous pressure of at least 30 bar.

The ball joints are manufactured at Dredge Yard facilities in collaboration with our partners in the Republic of Turkey. The manufacturing process involves casting and heat treatment of all components, which is followed by machining to the finest tolerances. Some of our dredge ball joint benefits include:

  • Easy assembly and dis-assembly
  • Low maintenance required
  • Low friction between ball and gland due to grease grooves and polished ball and gland face
  • Replaceable liners made from wear resistant materials
  • Quick fix and release of locking

Dredge ball joint testing & quality control

To ensure high quality and durability, all of our ball joints undergo heavy testing and quality control. Dredge Yard team of engineers always supervise the manufacturing and testing process. Therefore, we can guarantee that all parts are delivered in accordance with Dredge Yard specifications and to customer’s satisfaction. Accordingly, each dredge ball joint component is tested both – separately, and in combination with the other parts. This ensures its functionality and interchangeability in the dredging field.

Dredge ball joint testing

Dredge ball joint testing

During delivery, dredge ball joints are tested at pressures, which exceed the maximum operating pressure on site. More specifically, several dredge ball joints are statically tested over 30 bar for a duration of one hour.

Additionally, one of the dredge ball joints is tested at a special facility in a so-called dynamic test. During the dynamic test, the dredge ball joint is fully pressurized up to 30 bar, while a movement of the ball joint is created by a hydraulic cylinder. We do this to simulate the forces encountered when in use, and ensure durability of the component under severe conditions.

Dredge ball joints for delivery

Dredge ball joints for delivery

Finally, dredge ball joints are used by welding the heavy-duty steel pipe to two parts of the ball joint. Thick heavy welds are applied in order to ensure that the complete system withstands the pressure of at least 30 bar and external forces such as currents, waves and wind.

Post purchase support

Following the thorough manufacturing and testing process, we delivered all ball joints to a customer in the Middle East. Ball joints were ordered for immediate use at a dredging project in the gulf region. Dredge Yard service team will follow up with the customer for continuous monitoring and support on the use of dredgers, as well as assist whenever needed.

all dredger engineered design

Selection of dredgers by Dredge Yard

Aside from dredge ball joints and other dredge components, Dredge Yard specializes in high quality, small to medium sized dredgers. We put special focus on high efficiency and innovative solutions in order to achieve lowest equipment prices, operational costs and impact on the environment. If you are interested and would like to know more, do not hesitate to contact us here,or fill out the form below.

 

Contact

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All about WATER INJECTION DREDGING

Water Injection Dredging: what, when, how?

Water bodies including harbours, ports, canals and rivers carry sediments, which eventually settle on the waterbed and in time, result in siltation. Siltation reduces waterway access for ships, and can lead to flooding. Therefore, regular maintenance dredging is necessary to maintain appropriate water depths and safe navigation. While traditional dredging techniques are an effective solution for removal of accumulated sediments, it can be a costly process, especially for smaller ports and harbours. Water Injection Dredging (WID) is a dredging method, which is considered more environmentally friendly and cost efficient, but requires specific soil and environmental conditions.

Water Injection Dredging Diagram

Water Injection Dredging Principle

WID method involves water injection into the sediments. Therefore, a water injection dredger contains a series of nozzles located on a jetbar, which spray water. In contrast to traditional dredging methods, WID does not involve any suction, pumping or transport of the dredged materials.  More specifically, water injection dredging process can be divided into the following four steps:

  1. Injection: large amount of water is injected at low pressure into the sediments in the bottom of the waterway.
  2. Transition: the injected water loosens the sediments and creates a water and sediment mixture (fluidised soil layer). This layer results in lower density than the sediments, but higher density than that of the surrounding water.
  3. Transport: due to the difference in material densities, the fluidised soil layer is transported through the natural phenomenon of water currents, minimizing the disturbance to the natural ecosystem.
  4. Settlement: once the sediments reach deeper waters they settle down again. This process does not involve removal of materials from their natural ecosystem.

Benefits of Water Injection Dredging

Water Injection Dredger 150 3D model

3D model of our Water Injection Dredger 150

When applicable, water injection dredging features a range of economic and environmental advantages in comparison to more traditional dredging methods. Some of these are listed below:

  1. Water injection dredgers are small and compact sized. Some, including our Water Injection Dredger ECO 150, can even be transported in a single container. This makes the dredger easier to mobilise than larger dredging vessels.
  2. Due to its compact size, water injection dredger is especially manoeuvrable. Thus, it can operate in locations that are difficult to access, such as close to river or canal embankments or in smaller harbours.
  3. Water injection dredging does not require additional equipment such as pipelines or boosters. As a result, a water injection dredging project is less complicated, requires less organisation and can be started as soon as the dredger is delivered on site.
  4. Since additional support equipment is not needed, water injection dredging process becomes less costly and does not disturb shipping traffic when in operation.
  5. WID requires very little energy for water injection, in comparison to energy required for heavy material suction and transport. Therefore, fuel consumption of a water injection dredger is low, resulting in low operational costs.
  6. In the right conditions (e.g. water depths, currents, materials), water injection dredgers have high production rates. This leads to shorter project execution time frames and lower costs.

Environmental Impacts of Water Injection Dredging

Environmental Dredging Landscape

Aside from the above mentioned time and economy related advantages, water injection dredging is unique for its environmentally friendly characteristics. For example:

  1. This dredging method does not include sediment suction and removal. It uses natural phenomena including water current and gravity as a means of sediment transport. Accordingly, fluidized materials (1-3m thick) travel horizontally alongside the waterbed, while the surrounding water remains unaffected. In comparison, traditional dredging techniques involve vertical transfer of dredged materials throughout the whole water depth.
  2. Dredged sediments remain within the natural environment, avoiding the possible shortage of necessary materials in the ecosystem.
  3. Water injection dredging requires significantly less energy than traditional dredging methods, which involve suction and pumping of heavy materials. As a result, water injection dredgers have a much lower fuel consumption, and therefore, significantly lower CO2 emissions per m3 of dredged materials.

Is Water Injection Dredging an applicable dredging method for your project?

All application images

Water injection dredging is considered a cost-efficient, effective and environmentally friendly dredging solution. It is especially suitable for maintenance dredging and in locations that may be difficult to reach for larger vessels. Nevertheless, this method requires very specific conditions for safe and efficient dredging operations. Therefore, it is necessary to assess the environmental impact and conditions in and around the dredging location. Some of the points to consider include:

  • There must be a lower area at the end of the dredging site, where the dredged sediments can be transported to and settle.
  • For water injection dredging to be an efficient dredging method, river currents or tidal flow should be present. This will ease the natural transportation of the materials.
  • Sediments should not contain contaminated materials, as this can spread pollutants and cause harm to the environment.
  • There should not be any sensitive marine life such as shellfish beds, corals or the like in and around the dredging area.

Water Injection Dredgers

Water injection Dredger ECO 150 Arrangement

Water Injection Dredger ECO 150 Arrangement

There is a large variety of dredging equipment engineered for water injection dredging applications, ranging from small to larger vessels. However, water injection dredging method is usually most applicable for smaller maintenance dredging projects. An example of such applications can be reoccurring harbour or canal deepening. Dredge Yard specializes in manufacturing small to medium sized dredgers, which are ideal for maintenance projects. Last week we introduced our new addition to our dredger family – Water Injection Dredger ECO 150 – a compact, manoeuvrable, easy to operate dredger. See Water Injection Dredger specifications here.

Are you curious if water injection dredging can be the right method for your project? Do you need more information on the suitable equipment or price? Contact Dredge Yard here, we will be happy to advice & get back to you within 48 hours.

More Information on Water Injection Dredging

Water injection dredging is getting more attention again due to its environmental and economical benefits. Therefore, “Impacts & Benefits of Water Injection Dredging” is going to be one of the key topics at the 4th European Dredging Summit held in Rotterdam, Netherlands on 6-8th March 2019. European Dredging Summit focuses on sustainability, challenges and opportunities with the European dredging industry. See More information here.

Find more information on the history and principle of Water Injection Dredging on TU Delft article here.

For more details on Water Injection Dredging click here.

Introducing: Our new dredger series ECO 150

At Dredge Yard, we started the year 2019 with a new addition to our dredging equipment selection – dredger series ECO 150!

ECO 150s are compact, budget dredgers. They feature a convertible design, which means that the two side pontoons can fold upwards. This makes the dredgers extremely compact and easily transportable in a standard, high cube (40 feet) container, completely assembled. Additionally, this design ensures that the dredger is easy to launch, operate, remove from water & store for later use. Therefore, ECO 150 dredgers are ideal for small, reoccurring maintenance projects.

dredger ECO 150 convertible design

dredger ECO 150 convertible design

Types of dredgers

All of the ECO 150 dredgers are of the same compact size and design, which can be easily transported to any location. Additionally, they are one-man operated and have low fuel-consumption, which results in lower CO2 emissions and lower overall operating costs. Yet, the ECO 150s series consists of three different types of dredgers with different dredging processes for a variety of applications.

Auger Dredger ECO 150

Auger Dredger ECO 150 3d Model

Auger dredger ECO 150, 3D model

Auger ECO 150 is a budget dredger, which causes minimal turbidity. Therefore, it is ideal for environmental, cleaning & maintenance dredging projects. For example, settling pond cleaning or water intake dredging and maintenance.

Plain Suction Dredger ECO 150

Plain Suction ECO150 in water 3D model

Plain Suction ECO 150 in water, 3D model

Plain Suction ECO 150 features a maximum dredging depth of 8 metres, which can be easily extended up to 20 metre depth, depending on the project requirements. Therefore, this dredger is especially suitable for thick layered sand extraction projects, deep-dredging projects and loose sediment dredging and suction. Some of the applications for this dredger include reservoir, lake & dam dredging.

Water Injection Dredger ECO 150

Water Injection Dredger 150 3D model

Water Injection Dredger 150, 3D model

Everyday, sustainability and environmental impact of dredging are becoming as significant as ever. Therefore, we believe that it is important to strive for innovation of the most responsible, greener solutions, but also pay attention to the existing dredging techniques. Therefore, among our new dredge series – we have a Water Injection Dredger ECO 150.

Water Injection Dredging is a hydrodynamic dredging method, considered to be one of the more cost-efficient and environmentally friendly dredging solutions. For a thorough insight into water injection dredging, when it is applicable and with what environmental impact, read here.

Water Injection dredger ECO 150 is an environmentally friendly solution, due to its low CO2 emissions & water injection method, which does not involve material removal from the ecosystem. It is ideal for silt dredging & other small maintenance projects, such as river, canal or channel dredging.

More Information on different types of dredgers

Find more information and specifications:

Auger ECO 150 here

Plain Suction ECO 150 here

Water Injection dredger ECO 150 here

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