Influence of carbon source and temperature on the denitrifying phosphorus removal process |
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Authors: | Wang Yayi Wang Shuying Peng Yongzhen Zhu Guibing and Ling Yunfang |
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Institution: | (1) School of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, 310014, China;(2) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100022, China;(3) School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China |
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Abstract: | To supply the valuable operating parameters for the popular usage of the new denitrifying phosphors removal process, it is
essential to study the dominant biochemical reactions and the characteristics of denitrifying phosphorus removing bacteria
(DPB). Thus, parallel batch experiments using DPB sludge were carried out to assess the effect of substrates (sewage, HAc,
and endogenous carbon source) on denitrifying dephosphorus removal efficiency in this study. The results showed that the initial
specific phosphorus release rate increased with the high concentration of the short-chain volatile fatty acids ratio in the
influent, and sufficient phosphorus was released by DPB. This improved the subsequent denitrification and phosphorus uptake
efficiency. The specific endogenous denitrification mainly relies on the internal carbon source (PHB) stored by poly-P bacteria.
Denitrifying phosphorus removing bacteria were very hungry when the internal PHB was consumed. Consequently, the specific
endogenous denitrification rate was low and the phosphorus uptake did not happen. On the other hand, in the experiment, the
denitrifying phosphorus removal performance under two temperature conditions (8–10°C and 25–26°C) was also investigated and
analyzed. It was found that the lower temperature decreased the specific phosphorus release and uptake rate, but did not inhibit
the denitrifying phosphorus removal completely. Therefore, the negative influence of the low temperature on the overall phosphorus
removal was not significant.
Translated from Acta Scientiae Circumstantiae, 2006, 26 (2): 186–192 译自: 环境科学学报] |
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Keywords: | denitrifying phosphorus removal denitrifying phosphorus removing bacteria (DPB) carbon source temperature |
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