Original scientific paper

Utilization of Electrohydrodynamic Cavitation in Primary Sludge Conditioning

T. A. Marcinkowski ; Wroclaw University of Technology, Institute of Environment Protection Engineering, Plac Grunwaldzki 9, 50-377 Wroclaw, Poland
P. J. Aulich ; Wroclaw University of Technology, Institute of Environment Protection Engineering, Plac Grunwaldzki 9, 50-377 Wroclaw, Poland

Abstract

This paper presents a brief characterization of the method of electrochemical conditioning of sludge, using the effect of low-temperature plasma. Primary sludge from the municipal wastewater treatment plant in Gorzów was analysed. The sludge was conditioned electrochemically, chemically with calcium hydroxide and dihydrogen dioxide, and using a combined method – electrochemical and chemical. For each conditioned sludge its settlement characteristics, hydration, dry mass content, organic and mineral
substances, calculated and measured specific filtration resistance, effectiveness of filtration, iron content in ash, as well as energy-consumption in the process were determined. For the electrochemical, chemical and combined processes of primary sludge conditioning, their courses were compared. It was proved that (1) processes of conditioning cause changes in properties of primary sludge; (2) electrochemical conditioning causes mineralization
and stabilization; (3) dewaterability of sludge is improved; (4) the process can be supported using additionally calcium hydroxide and dihydrogen dioxide; (5) optimization of the process can be performed only by improving the effectiveness of selected process parameters.

Keywords

Electrochemical conditioning; chemical conditioning; specific resistance of filtration; effectiveness of filtration; power consumption; optimization

Hrčak ID:

59069

URI

https://hrcak.srce.hr/59069

Publication date:

30.9.2010.

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