© 2019 by Maverick-USA, Inc.

M/LTE’s mechanical dewatering process begins with a detailed plan developed by our team of experienced chemists and technicians. Once the goals of the project have been aligned with the composition of the materials to be removed, M/LTE employs its fleet of reliable and advanced mobile dewatering units to efficiently begin the process. Focusing on minimal turbidity while capturing a high percentage of solid sludge and silt, our multi-stage dewatering methods result in a dry cake that can be removed, recycled or applied to an existing land project. M/LTE has completed many mechanical dewatering projects to remove sand, sediment, manufacturing byproducts, biosolids, and mine tailings from both manmade and natural waterways.

 

Mechanical Dewatering the most rapid dewatering process but is usually the most expensive. Utilizing mechanical dewatering equipment allows for the material to be dewatered and hauled off as it is being dredged. For some upscale communities, this convenience is often worth the additional costs. For many municipal and industrial applications, due to limited real estate, there is no other option.

 

Typical mechanical dewatering equipment consists of belt presses, filter presses, hydro cyclones, shaker/vibratory screens, or a combination of all these products. M/LTE operates multiple mechanical dewatering plants that are capable of dewatering slurry volumes up to 10,000+ gpm. These types of systems are ideal for ash ponds, material processing plants, tailings ponds, and more.

The need for sediment dewatering may be  motivated  by  a  need  for  disposal  of  contaminated  sediment,  a  reduction  in  the  size  of  confined  disposal  areas, or the scarcity of acreage adjacent to dredge sites.  In recent years the need to recycle these sediments for “reuse” where dredging sediments are successfully treated and dewatered to be used as construction fill, agriculture additives and even beach sand have also become a major motivation for treatment and dewatering.  For these reasons and more, solids containment and dewatering practices have increased in importance in recent years. The material handling aspect of a dredging project must now be regarded as a solids dewatering  project.

The variables that influence equipment choices are many and must be considered in conjunction with the overall objectives of a given sediment dewatering project.

The driest cakes are generated by plate and frame presses and geotextiles. This is due to the length of time the solids are exposed to hydraulic pressures and the relatively low shear forces exerted during their use. Larger amounts of chemical additives are required to build stronger bonds, which can withstand stronger shear forces in certain types of equipment. Accordingly, chemical dosing is lowest for plate and frame presses and geotextiles with low shear forces.

 

Ease of operation depends on the operating complexity of the equipment. Geotextiles are the easiest to operate because there are no moving parts. On the other hand, they also require large amounts of space. Plate and frame presses also have relatively large footprints because they operate in batch mode, and multiple units are required to ensure a continuous operation.

Geotextile tubes are large sludge dewatering bags or Geo-containers constructed from high strength, permeable geotextiles. They work with any material that is hydraulically transported. In most applications, the use of polymers is recommended to enhance the dewatering process. Geotextile tubes are cost-effective, fast, and efficient and have minimal environmental impact.

 

The list of materials that can been dewatered by geotextile tubes includes:

  • Municipal water treatment and wastewater sludge

  • Contaminated dredged material

  • Marine dredge sediments

  • Agricultural animal waste

  • Fine-grained, inorganic industrial sludge

  • Construction dewatering

  • Shale fracking waste water

As an alternative to sludge lagoons, wet hauling, sand drying beds, wedge wire systems, presses and other mechanical dewatering methods, geotextile tubes offer significant cost savings. And they are environmentally friendly. Often, the decanted water can be reused or discharged into local water tables, streams or storm drainage systems. Because they dewater faster than open-air pits and do not require standard heavy equipment, they create a smaller foot-print, increasing the number of potential dewatering sites and optimizing land usage when the area for containment and dewatering is limited. Sludge dewatering tubes are made from tough, UV resistant geotextiles.

 

  • Cost-effective alternate to traditional methods

  • Minimal environmental impact

  • Small footprint

  • Optimize land usage

  • Work with a large variety of sediments, sludge and sand

  • High-strength, permeable geotextile

  • Tough, UV resistant