Rapid Dewatering of a Stored Sludge – Focus on High Throughput

Background

The factory has a long tradition in precious metal processing for the electrical engineering and automotive sector. This high-density chemical sludge contains a lot of metals with nearly any fibre content (0.5%). AMCON was invited to dewater about 10 – 15m3 of sludge from a storage tank which had been stored for several months. The task was to dewater it as quickly as possible, so the focus was on achieving a high throughput.

Installation Details

The VOLUTE DUO™ RVP-241 dehydrated 10 m3 of sludge in approximately 16 hours with a flow rate of 60 kg-DS/h and a dryness of more than 34%. In all tests, the flocculation was dosed only by means of an in-line mixer in the absence of the flocculation tank. The VOLUTE DUO™ with its small footprint and high flow rate met the needs of this type of plant, and therefore could soon replace other dehydration technologies typically used in the chemical industry.

Wastewater Treatment Plant Conditions and Performance Data

Model:	RVP-241
Sludge type:	Chemical
Total solids:	18%
Inorganic contents:	79.5%
Flow rate:	0.33 m3/h
Feeding DS throughput:	60.0 kg-DS/h
Cake DS content:	34.7%
Neat polymer dosage:	10.5 g/kg-DS
Capture rate:	98.1%