The electrodewatering of sewage sludges
- CSIRO, North Ryde, New South Wales (Australia). Div. of Coal and Energy Technology
Electrodewatering (EDW), the enhancement of conventional pressure filtration by an electric field, is an emerging technology with the potential to improve dewatering especially for difficult materials. CSIRO has many years of experience in EDW, ranging from bench scale tests to demonstration trials. A recent program has investigated the applicability of EDW to aerobic wastewater treatment sludges which are particularly difficult to dewater using conventional equipment. The bench scale filtration experiments produced cakes with solids contents of 35--46 wt% using EDW, compared with 24--30 wt% using pressure filtration alone. The paper: describes how the dewatering results were achieved; identifies a relationship between moisture removal limits by EDW and the forms of water within the sludge; and shows the results of preliminary attempts to mathematically model the EDW process.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 355701
- Journal Information:
- Drying Technology, Vol. 17, Issue 3; Other Information: PBD: Mar 1999
- Country of Publication:
- United States
- Language:
- English
Similar Records
A hydrate process for dewatering sewage sludge: Feasibility and energy resource potential
Coal as a supplemental heat source in sewage sludge incineration