Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 3, Pages 2455-2461Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.11.011
Keywords
Wastewater treatment; Alkaline phosphatase; Phosphorus fractions; Standards; Measurements and Testing (SMT)
Funding
- National Water Pollution Control and Management Project of China [2008ZX07101-006]
- Key Laboratory of Non-point Sources Pollution Control
- Ministry of Agriculture of the People's Republic of China
- Science Foundation of Chinese University
- National Basic Research Program of China (973 Program) [2007CB109305]
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The alkaline phosphatase activities (APA) and phosphorus fractions in activated sludge during wastewater treatment were studied. Our results showed that the phosphorus concentration and fractions in activated sludge were highly correlated with the characteristics of influents. Inorganic phosphorus (IP) and non-apatite inorganic phosphorus (NAIP) were the main phosphorus fractions of sludge. A larger phosphorus concentration was found in activated sludge due to the more readily mobilizable and bio-available forms. The APA in sludge was directly correlated with mixed liquor suspended solids (MISS) in activated sludge. The APA in the sludge is implicated the depletion of organic phosphorus forms in sludge, whilst also implying its less inhibition of inorganic phosphorus in sludge. The APA and phosphorus fractions in different sludge samples from the same wastewater treatment plant were quite stable. This stability shows their tight interactions in sludge. (C) 2010 Elsevier Ltd. All rights reserved.
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