NaCl盐度对吡啶缺氧反硝化降解的影响

采用批量实验研究NaCl盐度对常规活性污泥(非耐盐污泥)缺氧反硝化降解吡啶的影响。结果表明,吡啶降解受到盐度的影响,在盐度为5.0 g/L时,降解率最高。硝酸盐氮在盐浓度为2.5 g/L时,降解率可达85%,当盐度大于10.0 g/L时,氨氮浓度呈上升趋势,高盐度使微生物结构发生破坏是氨氮浓度升高的原因;在不同盐度条件下,总氮降解浓度会发生变化,在盐度为2.5 g/L时,总氮降解率最高。

Influences of NaCl salinity on anoxic denitrification degradation of pyridine

Using batch experiments,the influences of NaCl salinity on anoxic denitrification degradation of pyridine by conventional activated sludge(non-salt tolerant sludge) have been studied. The results show that pyridine degra-dation is affected by salinity. The degradation rate is the highest ,when the salinity is 5.0 g/L. The degradation rate of nitrate nitrogen can reach 85%,when the salinity is 2.5 g/L. When salinity is higher than 10.0 g/L ,ammonia nitrogen concentration tends to rising up. High salinity causes microbial structure to be damaged ,which results in the rising up of ammonia nitrogen concentration. Under different salinity conditions ,the total nitrogen degradation concentra-tion may change. When the salinity is 2.5 g/L ,the degradation of total nitrogen is the highest.