A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effects of nitrite on phosphate uptake in anaerobic-oxic process
Abstract An anaerobic-oxic (A/O) biological phosphorus removal reactor was operated to study the effect of nitrite on phosphate uptake. The phosphorus uptake profile was determined under different operating conditions. The results indicated that in addition to oxygen and nitrate (DPBNa, nitrate denitrifying phosphorus removal), to some extent, nitrite could also serve as an electron acceptor to achieve nitrite denitrifying phosphorus removal (DPBNi). The quantity and rate of phosphorus uptake of DPBNi, however, were evidently lower than that of DPBNa. The experiment results revealed that nitrite would bring toxic action to phosphate-accumulating organisms (PAOs) when NO2 −-N ⩾ 93.7 mg/L. The nitrite existing in the anoxic reactor made no difference to the quantity and rate of denitrifying phosphorus removal, but it could reduce the consumption of nitrate. Moreover, the data showed that the aerobic phosphate uptake of DPBNi was lower than that of anaerobic phosphorus-released sludge in a traditional A/O process. However, there was not much difference between these two kinds of sludge in terms of the total phosphorus uptake quantity and the effluent quality.
Effects of nitrite on phosphate uptake in anaerobic-oxic process
Abstract An anaerobic-oxic (A/O) biological phosphorus removal reactor was operated to study the effect of nitrite on phosphate uptake. The phosphorus uptake profile was determined under different operating conditions. The results indicated that in addition to oxygen and nitrate (DPBNa, nitrate denitrifying phosphorus removal), to some extent, nitrite could also serve as an electron acceptor to achieve nitrite denitrifying phosphorus removal (DPBNi). The quantity and rate of phosphorus uptake of DPBNi, however, were evidently lower than that of DPBNa. The experiment results revealed that nitrite would bring toxic action to phosphate-accumulating organisms (PAOs) when NO2 −-N ⩾ 93.7 mg/L. The nitrite existing in the anoxic reactor made no difference to the quantity and rate of denitrifying phosphorus removal, but it could reduce the consumption of nitrate. Moreover, the data showed that the aerobic phosphate uptake of DPBNi was lower than that of anaerobic phosphorus-released sludge in a traditional A/O process. However, there was not much difference between these two kinds of sludge in terms of the total phosphorus uptake quantity and the effluent quality.
Effects of nitrite on phosphate uptake in anaerobic-oxic process
Li, Jie (author) / Xiong, Biyong (author) / Zhang, Shude (author) / Yang, Hong (author) / Zhang, Jie (author)
2007-02-01
4 pages
Article (Journal)
Electronic Resource
English
The Research Progress on Oxic-Settling-Anaerobic Sludge Reduction Process
| British Library Conference Proceedings | 2014
Anaerobic/oxic Treatment of Slurry-type Swine Waste
| British Library Online Contents | 2008
Mechanism on minimization of excess sludge in oxic-settling-anaerobic (OSA) process
| Springer Verlag | 2008
Characteristics of nitrification and denitrification of the media-anaerobic-anoxic-oxic process
| British Library Conference Proceedings | 1996
Characteristics of nitrification and denitrification of the media-anaerobic-anoxic-oxic process
| British Library Conference Proceedings | 1996