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Effect of sludge type on the fermentation products
- Source :
-
Chemosphere . Jun2010, Vol. 80 Issue 4, p445-449. 5p. - Publication Year :
- 2010
-
Abstract
- Abstract: Primary sludge (PS), waste activated sludge (WAS) and a mixture of WAS and PS were fermented at 21°C. The sludge was collected from two plants: the biological nutrient removal (BNR) West End Water Pollution Control Center (WEWPCC) and carbon-removal only South End WPCC (SEWPCC). The PS fermentation predictably generated a significantly higher amount of soluble COD than WAS. WAS fermentation released considerable amounts of phosphate and ammonium. Co-fermentation of WAS with PS enhanced soluble COD production and increased the release of phosphate and ammonium. The semi-continuous flow fermenters showed that regardless of the sludge source, with a similar total COD load, there was no significant difference in soluble COD production observed during co-fermentation between the two plants. Volatile fatty acids were the primary components of the soluble COD generated during fermentation. 20–22% volatile solids destruction was achieved due to sludge fermentation. The WEWPCC sludge released a higher concentration of phosphate than the SEWPCC sludge – the latter originating from a non-BNR process. Fermentation of combined PS and WAS sludge generated a concentration of phosphate high enough to allow phosphorus recovery as struvite at both plants. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00456535
- Volume :
- 80
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Chemosphere
- Publication Type :
- Academic Journal
- Accession number :
- 51402899
- Full Text :
- https://doi.org/10.1016/j.chemosphere.2010.04.026