Treatment of sewage sludge using electrokinetic geosynthetics

Journal of Hazardous Materials
Stephanie GlendinningColin J F P Jones

Abstract

The treatment and disposal of sewage sludge is one of the most problematical issues affecting wastewater treatment in the developed world. The traditional outlets for sewage sludge are to spread it on agricultural land, or to form a cake for deposit to landfill or incineration. In order to create a sludge cake, water must be removed. Existing dewatering technology based on pressure can only remove a very limited amount of this water because of the way in which water is bound to the sludge particles or flocs. Several researchers have shown that electrokinetic dewatering of sludge is more efficient than conventional hydraulically driven methods. This involves the application of a dc voltage across the sludge, driving water under an electrical gradient from positive (anode) electrode to negative (cathode) electrode. However, there have been several reasons why this technique has not been adopted in practice, not least because the, normally metallic, anode rapidly dissolves due to the acidic environment created by the electrolysis of water. This paper will describe experimentation using electrokinetic geosynthetics (EKG): polymer-based materials containing conducting elements. These have been used to minimise the problem of electro...Continue Reading

Citations

Oct 24, 2008·Environmental Technology·P A TuanS Mika
Jan 1, 2014·Bioresource Technology·Ramnath Lakshmanan, Gunaratna Kuttuva Rajarao
Jul 1, 2008·Chemosphere·Shou-Heng Liu, H Paul Wang
Apr 12, 2016·Environmental Technology·Degang MaJun Zhai
Mar 12, 2018·Environmental Science and Pollution Research International·Xianqiang TangMiklas Scholz
Mar 1, 2016·Scientific Reports·Chun Yee LimYee Cheong Lam
Aug 17, 2021·Journal of Environmental Management·Shinjini Paul Choudhury, Ajay S Kalamdhad
Jul 25, 2017·Analytical Chemistry·Chun Yee LimYee Cheong Lam

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