Sludge Treatment Plant
In 1997 NESL built its first sludge treatment plant that incorporated a heavily modified forty-foot container divided into three thirteen tonne processing tanks with built in heating, circulation, dosing and transfer systems. It also included a three-phase centrifuge and separated water treatment system.
Today the evolution of the system has resulted in the NES/STP (Non Entry System/Sludge Treatment Plant) available in both modular and permanent arrangements.
Our standard systems range in size from the ST5 (5m3 p/h) through to ST50 (50m3 p/h) however larger systems if required are custom designed and built to the client’s requirements.
The major components of the Sludge Treatment System include:
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Module 1 - Mix & Blend Tank – Where the blending of heavy oil with a cutter stock is required, the MBT is a modified twenty or forty-foot shipping container with a single or twin mixing tanks with twenty thousand litre capacity. Each tank is outfitted with twin agitators, circulation pumps, level detection and a full suite of electrical controls. If required full automated steam heating coils and controls can be fitted.
Module 2 - Process Feed Tank – The PFT container is complete with in-built conditioning tank, a heavily modified forty-foot shipping container containing a single twenty thousand litre heated production tank with mixers, twin progressive cavity pumps, full chemical dosing system, flow meter, level detection, full alarm suite and complete control panel setup.
Module 3 - Two-Phase Centrifuge or Three Phase Tricanter – NESL only incorporate equipment into its systems that has been tried and tested, with a range of separation equipment from UK, European and American manufactures. Depending on requirements the systems can be fully automated or allow for on the fly changes to tricanter pond depths as needed.
Module 4 - Settling Tank - A modified twenty-foot shipping containing designed to allow liquid phase to settle out before onward movement.
Any number of additional modules can be added depending on budgets, project size etc and could include:
Re-Heat Module – A pair of heat exchangers used to reheat the liquid offtake for onward treatment or movement.
Polishing Module – Disk stack separators for the polishing of water and oil from the process.
Drying Module – Customised drying unit for the removal of moisture from the sediment removed by the decanter/tricanter.
Heat Module – A custom designed and built containerised boiler system with hot well tanks, steam blowdown and water treatment system built in.
Power Module – Custom designed and built containerised generator system to provide reliable and constant power for the system.
Filtration Module – Custom designed and built inline filter unit to pre screen and remove materials over a pre-determined size prior to either the MBT or decanter/tricanter unit