Enhanced dewaterability of anaerobically digested sewage sludge using Acidithiobacillus ferrooxidans culture as sludge conditioner
- Title
- Enhanced dewaterability of anaerobically digested sewage sludge using Acidithiobacillus ferrooxidans culture as sludge conditioner
- Author
- Mayur Bharat Kurade
- Keywords
- Acidithiobacillus ferrooxidans; Anaerobically digested sewage sludge; Sludge conditioning; Sludge dewaterability
- Issue Date
- 2014-06
- Publisher
- ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
- Citation
- BIORESOURCE TECHNOLOGY, 권: 169, 페이지: 374-379
- Abstract
- Role of Acidithiobacillus ferrooxidans culture in bioacidification and dewaterability of anaerobically digested sewage sludge (ADS) was investigated. A. ferrooxidans culture grown in 9K medium along with Fe2+ produced iron flocculant containing, secondary iron minerals and biopolymeric substances as confirmed by FT-IR, XRD, and SEM-EDX. Bioacidification of ADS was performed using 10% (v/v) A. ferrooxidans culture, isolated cells and cell-free culture filtrate; and dewaterability was assessed using the capillary suction time (CST) and specific resistance to filtration (SRF). Isolated bacterial cells significantly (P < 0.05) reduced the sludge dewaterability when supplemented with Fe2+ while the whole culture and cell-free filtrate rapidly acidified the sludge without Fe2+ and showed significant reduction of CST (71.3-73.5%) and SRF ( 84-88%). Results clearly indicated that the culture and filtrate of the A. ferrooxidans facilitated rapid sludge dewaterability while the cells supplemented with Fe2+ also enhanced dewaterability but required 2-4 days. (C) 2014 Elsevier Ltd. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S0960852414009018?via%3Dihubhttp://hdl.handle.net/20.500.11754/55735
- ISSN
- 0960-8524; 1873-2976
- DOI
- 10.1016/j.biortech.2014.06.057
- Appears in Collections:
- INDUSTRY-UNIVERSITY COOPERATION FOUNDATION[S](산학협력단) > ETC
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