高效脱氨氮菌株的分离纯化及其除臭效果研究

Research on Separation, Purification and Deodorant Effect of High-Efficient Ammonia Nitrogen Removal Strains

针对黑臭水体治理中氨氮去除效率低这一问题,采用改良型培养基及菌株分离技术,分离出6株利用NH_4^+作为氮源的菌株,3株利用NO_2^-作为氮源的菌株,分别编号X1~X9。从中筛选出生长速度较快的菌株X1、X3、X8,对其氨氮去除能力和亚硝酸盐去除能力进行了研究。结果表明,当菌株X1和菌株X8混合作用时,氨氮去除率比单菌株及其他混合菌株的去除率高,可达90%以上。将X1、X8混合菌株接种于污水水样,6 d后,氨氮含量降低了82.6%,嗅阈值也随之减小,除臭效果明显。

In allusion to the problem of low ammonia nitrogen removal efficiency in smelly water, the improved culture medium and strain separation technique was used to isolate six strains which using NH4＋ as the nitrogen source, and three strains which using NOr as the nitrogen source, they were numbered X1-X9. X1, X3 and X8 of high growing speed were screened, and the ammonia nitrogen removal ability and nitrite removal ability of them were studied. The result showed that the annnonia nitrogen removal rate could be up to 90% when X1 and X8 were mixed, which was significantly higher than the others. Ammonia nitrogen content reduced by 82.6% when mixed strains were inoculated in sewage water six days later, and the olfactory threshold of water samples also decreased, thus its deodorant effect was obviously.