单级自养脱氮SBR处理消化污泥上清液研究

Autotrophic Denitrification of Digested Sludge Supernatant in SBR

在瑞士联邦供水、废水处理及水资源保护研究所(Eawag)一个容积为400L的SBR中,对富含氨氮的消化污泥上清液进行了为期半年的自养脱氮(厌氧氨氧化)工艺稳定运行试验。结果表明,在同一SBR反应器中实现了亚硝化和厌氧氨氧化反应,在脱氮能力为680gN/(m3·d)及水力停留时间<1d的情况下,该反应器对氮的去除率>90%。试验结果还表明,该工艺可通过检测和控制电导率、pH或亚硝酸盐等参数达到稳定运行。

A test of autotrophic denitrification （anaerobic ammonia oxidation） of ammonia-rich digested sludge supernatant was performed for six months in a 400 litre SBR at the Swiss Federal Institute of Aquatic Science and Technology （EAWAG）. The results show that the nitrosation and anaerobic ammonia oxidation are realized in the SBR. When the nitrogen removal capacity is 680 gN/（ m^3 · d）and hydraulic retention time is less than 1 d, the removal rate of nitrogen is more than 90%. The stable operation of the process can be obtained by detecting and controlling conductivity, pH or nitrite.