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VOLUTE DUO™ successfully dewaters highly abrasive sludge from petrol tank cleaning
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VOLUTE DUO™ successfully dewaters highly abrasive sludge from petrol tank cleaning

Petrochemical sludge treatment, France

  • VOLUTE DUO™ Dewatering Press
  • Oil
  • Raw wastewater
Petrochemical sludge treatment, France

Background

An industrial site in France collecting hazardous sludge from petrol tank washing and mixing with other hydrocarbon sludges sought to improve their sludge dewatering process. The sludge contained a high proportion of inorganic matter, sand, and fibrous residues, including wood and plastic fragments, making it extremely abrasive and difficult to homogenise. The site was separating liquids from solids by sedimentation in a sludge tank. AMCON recommended conducting a pilot test with the VOLUTE DUO™ RVP-241 unit to verify its suitability and performance under these harsh conditions, which led to the full-scale commissioning of the RVP-501 model.

1. Comparison of sludge and filtrate
1. Comparison of sludge and filtrate
2. Typical flocculation quality
2. Typical flocculation quality
3. Typical cake quality
3. Typical cake quality

Installation details

Following the successful pilot phase, the commissioned VOLUTE DUO™ RVP-501 achieved a cake dryness of 43.3% DS and a high throughput of 233.4 kg-DS/h. The capture rate reached 99.6%, and the client is very satisfied. Thanks to AMCON’s recommendation, the client installed a tumbler screen and an agitator in the sludge tank to facilitate the dewatering process. A TS meter is also a crucial element for the installation of the VOLUTE DUO™ dewatering press to optimise polymer consumption when the sludge TS content varies so significantly.

Wastewater treatment plant conditions and performance data

Details:
Model: RVP-241
Sludge type: Raw wastewater
Total solids: 33.9 %
Inorganic content: 83.3 %
Fibre content: 23.5 %
Flow rate: 0.5 m³/h
DS throughput: 169.3 kg-DS/h
Cake solids content: 47.2 %
Active poly dosage: 1.5 g/kg-DS
(polymer YESfloc COEX88)
Capture rate: 99.7 %