摘要：

采用9%聚乙烯醇+0.5%海藻酸钠包埋耐盐菌群的固定化生物硅藻土小球投加到循环式活性污泥(CAST)反应器中,对比传统CAST工艺和投加固定化小球的CAST工艺对含盐污水COD和氨氮的去除效果,考察固定化生物硅藻土小球强化CAST工艺处理含盐污水性能。试验结果表明:在相同运行条件下,投加固定化生物硅藻土小球的CAST工艺出水COD、氨氮去除率基本维持在88%和90%以上,与传统CAST工艺相比分别提高了15%和10%。同时,向CAST工艺添加固定化生物硅藻土有助于维持反应器中微生物浓度稳定,提高出水水质及其稳定性。

关键词: 固定化微生物, 循环式活性污泥法, 含盐污水

Abstract:

The immobilized bio-diatomite pellets,which consists of 9% of polyvinyl alcohol(PVA) and 0.5% of sodium alginate(SA) embedded salt-tolerant flora,should be added to the CAST reactor,so as to compare the removing effects of tradition CAST process and CAST process with the addition of immobilized biodiatomite pellets,on the removing rates of COD and ammonia-nitrogen from saline wastewater. The enhanced treatment capability of saline wastewater by the CAST process with immobilized biodiatomite pellets has been investigated. The results show that under the same operation conditions,the effluent COD and ammonia-nitrogent removing rates by the CAST process with the addition of immobilized bio-diatomite pellets can basically keep at 88% and 90% above,respectively. It is 15% and 10% higher,respectively,than that of the CAST process. In addition,adding immobilized bio-diatomite to CAST process is good for maintaining the stability of microbial concentration in the reactor, and for improving the effluent water quality and its stability.

Key words: immobilized microorganism, CAST, saline wastewater

中图分类号: 

• X703.1