处理城市污水的多功能混合菌研究

Study on Multiple Functional Mixed Microbes for Treating Municipal Sewage

从城市污水及工业废水中分离选育出一种高效多功能混合菌群 ,包括具有絮凝作用的芽孢杆菌 7株 (同时还有降解污染物的功能 ) .能利用其他有机物和降解某些工业污染物的细菌 6株、酵母 7株 .该混合菌群生长的 p H和温度范围较广 ,p H为 6～ 1 0 ,最适 p H7～ 8,温度为 1 5～ 37℃ ,最适为 30℃ .生长碳源以红糖最优 ,有机氮优于无机氮 .利用多功能混合菌完整细胞对合成城市污水处理效果表明 ,当细胞浓度达 2 0 mg· ml- 1 时只需通气 2 0 min就可将污水中 580 .64mg· L- 1 CODCr和 376.2 6mg·L- 1 BOD5完全去除 .从通气条件看 ,好氧和缺氧交替进行有利于处理效果的提高 .关键词 :城市污水 ,处理技术 ,多功能混合菌 .

A multiple functional mixed microbes was isolated and selected from municipal sewage and industrial wastewater.It included 7 strains of Bacillus sp.of floc forming,6 strains of other bacteria and 7 strains of yeast utilizing some organic compounds for growth and degrading some pollutants of municipal sewage.The range of pH and temperature for growth of them are wide,pH is 6～10 and optimum is 7～8,temperature is 15～37℃ and the optimum is 30℃.Sugar is the best carbon source,the organic nitrogen source is better than inorganic nitrogen for the growth.The results of synthetic municipal sewage treated by cells of the mixed microbes shwoed that the COD Cr (580 64mg·L -1 )and BOD 5(376 26mg·L -1 )of it may be removed totally during aeration for 20 minutes by 20mg·ml -1 of intact cells.The altering process of aeration and non aeration was used for increasing efficiency of treatment.