Phosphorus Release Mechanism in Phosphorus-Rich Waste Activated Sludge under Anozic Conditions
The effect of nitrate on phosphorus release was investigated with 3 groups brown anaerobic reactors by the additions of nitrate. The investigated object, phosphorus-rich excess sludge, comes from a sewage treatment plant in which the A/O process (an enhanced biological phosphorus removal process) was used. A series of indicators of sludge such as SCOD, PO4 3--P, NO3 —N and PHB were measured every certain time during experimental period. The results indicated that: the phosphorus release was inhibited obviously at the presence of nitrate. The accumulation of SCOD under anoxic conditions exceeded that under anaerobic conditions probably due to the methane production actions under anaerobic conditions; the metering ratio between PO4 3-- and PHB production are 1.0 mg PO4 3--P: 0.618 mg PHB and 1.0 mg PO4 3--P: 0.649 mg PHB under anaerobic and anoxic conditions, respectively; The relationship between the consumption of nitrate and intake of phosphorus in this work was shown as P= 0.069】N, which indicated strongly that nitrate were used to not only denitrifying phosphorus removal action, but also others such as anoxic denitrifying and ANAMOX etc.
phosphorus release mechanism phosphorus-rich waste activated sludge nitrate anaerobic condition
BI Dongsu
Chemical Engineering School of Shanghai Institute of Technology,Shanghai,200235,China;Environmental Science and Engineering School of Tongji University,Shanghai,200092,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
2241-2245
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）