焦化废水中解氰细菌的分离选育

从被氰化物长期污染的太原某焦化厂－曝活性污泥和黄血盐工段废水中,用浓度梯度法分离选育耐ＣＮ＾－性较高的１２个菌株中,选出６个菌株,并进行ＣＮ＾－降解率的测试,结果表明,顺２４℃,菌株００７号、０１２号及１＾＃混６ｈ的ＣＮ＾－降解率达８０％以上;若进水ＣＮ＾－浓度为４０ｍｇ／Ｌ,水力停留时间８ｈ,出水ＣＮ＾－下降到０．５ｍｇ／Ｌ,达到污水排放一级标准。

Lsolation and Screening of Degrading-cyanide Bacteria from Coke Wastewater

Wastewater samples contaminated by cyanogen were collected from wastewater treatment pool of a coking plant in Taiyung. Through enrichment trained,6 strains out of 12 with high tolerance to CN" were isolated and screened, and tested for CN" degradation rate have been conducted. The result showed that under 24C, 6 hours, strains 007 and 012 whose rate of degradation was more than 80%; when CN- concentration in influent was 40mg/L, and water retention time was 8 hours, then effluent CN- concentration was reduced to 0.5mg/L, met 1st grade of discharge standard.