氯酸钠抑制剂对SBBR工艺亚硝化过程的影响研究

Effect of sodium chlorate inhibitor on the nitrosification process of SBBR process

研究了NaClO_(3)抑制剂对SBBR工艺亚硝化过程的影响,并对NaClO_(3)抑制剂潜在生态毒性进行了分析。研究结果表明,投加NaClO_(3)对NH_(4)^(+)-N的去除无明显影响,但可以提高NO_(2)^(-)-N的积累速度,当NaClO_(3)投加量为1mol/L时,实现NO^-_(2)-N积累的时间比不投加NaClO_(3)缩短了10 d;且活性污泥颗粒化程度更高,生成颗粒污泥速度更快。NaClO_(3)毒性分析结果表明,投加1 mol/L NaClO_(3)不会对水体造成二次污染。投加NaClO_(3)抑制剂有利于SBBR工艺亚硝态氮的快速积累,能够在更短的时间内实现亚硝化。

The influence of NaClO_(3) inhibitor on the nitrosation process of SBBR process was studied,and the poten-tial ecotoxicity of NaClO_(3)inhibitor was analyzed.The research results showed that adding NaClO_(3) had no obvious eff-ect on the removal of NH_(4)^(+)-N,but it could increase the accumulation rate of NO_(2)^(-)-N.When the dosage of NaClO_(3) was 1 mol/L,the time to achieve NO_(2)^(-)-N accumulation was 10 days shorter than that of no NaClO_(3).The degree of granulation of activated sludge was higher,and the rate of granular sludge generation was faster.The NaClO_(3) toxicity analy-sis results showed that adding 1 mol/L NaClO_(3)would not cause secondary pollution to the water body.The addition of NaClO_(3) inhibitor was conducive to the rapid accumulation of nitrite nitrogen in the SBBR process and could achieve nitrosation in a shorter time.