Effect of Aluminum (Al(3+)) on Granulation in Upflow Anaerobic Sludge Blanket Reactor Treating Low-Strength Synthetic Wastewater
DSpace at IIT Bombay
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Title |
Effect of Aluminum (Al(3+)) on Granulation in Upflow Anaerobic Sludge Blanket Reactor Treating Low-Strength Synthetic Wastewater
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Creator |
SONDHI, A
GUHA, S HARENDRANATH, CS SINGH, A |
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Subject |
uasb reactor
start-up enhanced granulation domestic sewage heavy-metals performance polymers hydrogen binding system upflow anaerobic sludge blanket reactor granulation aluminum additive image analysis environmental scanning electron microscopy |
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Description |
The effect of aluminum on agglomeration in the sludge bed and chemical oxygen demand (COD) removal efficiency in laboratory-scale upflow anaerobic sludge blanket (UASB) reactors treating low-strength synthetic wastewater (approximately 665 to 738 mg/L of COD) was investigated. Continuous application of aluminum chloride (200 mg/L) caused poor COD removal, less sludge density, and adversely affected agglomeration in the sludge bed. An adverse effect on granulation also was observed when 300 mg/L aluminum chloride was added only during the startup, and the effect continued even after it was discontinued. A lower concentration of aluminum chloride (50 mg/L) added for 30 days after the reactors reached steady-state did not affect the COD removal efficiency, but adversely affected the growth of agglomerates and caused temporary degeneration of existing agglomerates. The adverse effect of aluminum appeared to stem from the precipitation of aluminum hydroxide on the surfaces of agglomerates. The effect of aluminum on agglomeration was shown to be a function of influent strength. Water Environ. Res., 82, 715 (2010).
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Publisher |
WATER ENVIRONMENT FEDERATION
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Date |
2011-09-01T10:24:08Z
2011-12-26T12:59:36Z 2011-12-27T05:52:06Z 2011-09-01T10:24:08Z 2011-12-26T12:59:36Z 2011-12-27T05:52:06Z 2010 |
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Type |
Article
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Identifier |
WATER ENVIRONMENT RESEARCH, 82(8), 715-724
1061-4303 http://dx.doi.org/10.2175/106143010X12609736966603 http://dspace.library.iitb.ac.in/xmlui/handle/10054/12749 http://hdl.handle.net/10054/12749 |
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Language |
en
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