Performances of Dominant Strains for Degradation of COD in Leachate
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摘要: 采用不断增大垃圾渗滤液浓度的方法,筛选出5株有效降解垃圾渗滤液化学需氧量(COD)的优势菌株,研究其对渗滤液COD的降解特性.结果表明,5株优势菌株均是好氧微生物,对COD的最佳降解时间为120 h,最适pH均为7;混合菌株比单一菌株的降解效果好,在30℃,pH为7时COD去除率为45.3%;加入碳源有利于渗滤液COD的降解,但加入无机氮源使COD的去除率降低.Abstract: Five dominant strains that can effectively degrade COD in leachate were selected based on a series of experiments,in which the concentration of leachate was increased step by step.The performances of the five dominant strains for degradation of COD were studied.The experimental results show that the degradation rate of the composite strains is 45.3% under the condition of 30℃ and pH 7.All the five strains are aerobic.The optimum time of degradation of COD in leachate is 120 h, and the best pH is 7 for all of five strains.The degradation performances of the composite strains are better than those of single ones.Carbon source has positive effect on leachate degradation,while nitrogen source negative.
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Key words:
- dominant strains /
- leachate /
- COD /
- degradation /
- performance
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