Dewatering technologies

Other sludge dewatering technologies used include vacuum filtration, centrifugation, and sludge bed drying. No pollutant removability data are currently available for this industry. 

Currently, dewatering in sludge beds and lagoons is considered to be too long and difficult to control. Therefore, instead of these beds, mechanical dewatering technology is employed. In this case the following systems are used ... 

There is a need to engineer field studies better in terms of the placement of electrodes, the maintenance of electrode conditions, and the separation/concentration of contaminants. Feasibility studies and practical data used in electrokinetic dewatering technologies may be of assistance, e.g. [85]. Undoubtedly, however, chemical changes in the soil mass must be carefully monitored and understood for efficacious remediation. 

Table 29.1 Comparison of Dewatering Technologies for Coal Fines (< 63 im)...

Dewatering technologies can be subdivided into two general processes air drying processes and mechanical processes. This chapter provides an overview of these technologies and concentrates on typical sludge dewatering operations used for wastewater treatment. 

Smollen, M. and Kafaar, A., Development of electro-osmotic sludge dewatering technology, WRC Report No. 427/1/95, CSIR, Stellenbosch, January 1995, ISBN 1 86845 163 1... 

Electrokinetics. Electrokinetics is a tested technology that has been used for over half a century to dewater and stabilize soils, and has recently been investigated for in situ use at hazardous waste sites (23). Primarily used for metals removal, the technology utilizes an electrical field to generate a flow and concentration gradient in porous and semiporous soils. 

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