[Research on CANON process for municipal sewage in room temperature].
In the room temperature 14.7-24.7 degrees C, simultaneous nitrification-ANAMMOX (CANON) process for municipal sewage was tested by SBR while the DO was controlled between 0.05 and 0.30 mg/L. As a result, the research shows that CANON process can be applied to the nitrogen treatment of municipal wastewater in room temperature by SBR. DO can be regarded as the indication parameter of reaction terminal, and 1 mg/L has been confirmed in the experiment. In the exploring SBR experiments, the consumption velocity of NH4(+) -N was 0.164-0.218 kg/(m3 x d), the production velocity of NO3(-) -N was 0.026-0.036 kg/(m3 x d), the removal velocity and efficiency of TN were 0.124-0.194 kg/(m3 x d) and 65%-75% respectively. Additionally, in the improving SBR experiments, there were three methods for avoiding nitrite accumulation and increasing the nitrogen removal efficiency. They were improving temperature, adding non-aeration period of time and increasing the quantity of ANAMMOX bacteria. Therefore, the removal efficiency of TN was increased to 77%-88% through the three ways above. However, in view of the nitrogen removal velocity and the fact of engineering application condition, the third approach was the best to advance the general ability of ANAMMOX.
Wang
Jun-An
JA
Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China. wangjunan@emails.bjut.edu.cn
Li
Dong
D
Tian
Zhi-Yong
ZY
Zhang
Jie
J
Zhu
Zhao-Liang
ZL
Fu
Kun-Ming
KM
D000693:Anaerobiosis; D019149:Bioreactors / Q000382:microbiology*; D002947:Cities; D009573:Nitrites / Q000378:metabolism; D009584:Nitrogen / Q000302:isolation & purification*; D009606:Nitrosomonas / Q000378:metabolism*; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*; D012722:Sewage / Q000737:chemistry*; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*
D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D012722:Sewage; D009584:Nitrogen