Audit, improvement, reliability and debottlenecking of an effluent treatment plant
Project phases: Feasibility studies
Study period: 3 months
Emdelen Mission :
- Pilot laboratory tests
- Physico-chemical treatment and determination of optimal settling speed
- FeCl3 coagulation at different dosages and comparison with the coagulant used
- Sludge filtration
- Multi-pH regulation with soda and lime milk
- Installation audit
- Non-optimized on/off operation with large flow variation
- Lack of pH regulation
- Decanter at the capacity limit
- High water consumption for washing the belt filter press
- On the basis of the audit and the results of the laboratory tests, our client is proposing the following modifications:
- Installation of a buffer basin upstream of the station for smoothing incoming effluent
- Mixing and homogenization of sludge pressing filter returns
- Packaging with ferric chloride (coagulant) and lime milk (pH regulation) which makes it unnecessary to use the floating function downstream of the settling tank
- Decrease in settling speed by splitting settling structures by placing the settling tank and the modified existing floating tank in parallel (transformation of the floating operation into a settling tank)
- Recycling of sludge in flocculation tanks
- Replacement of the belt filter press by a 100-litre tray filter press
- Installation of sand filters
- Expected results: TSS < 10 mg/l, sludge dryness 60%.
- Implementation of PIDs, functional analysis, implementation plans
- Sizing of the building’s structural modifications to accommodate new equipment
- CAPEX, OPEX and planning
Total amount of the project :
Range A < €10 million
Range B: between €10 and €20 million
Range C: between €20 and €50 million
Range D > €50 million
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