一株高效产絮菌的筛选、絮凝条件优化及对重金属废水处理性能研究
doi: 10.13205/j.hjgc.201506014
SCREENING,CULTURING OF A STRAIN OF FLOCCULANT-PRODUCING BACTERIA AND REMOVAL OF HEAVY METALS FROM WASTEWATER
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摘要: 从活性污泥、水体底泥、植物根系土壤和草莓种植土壤中筛选、分离、纯化,获得了高絮凝活性的菌株,并考察发酵液用量、助凝剂用量以及碳、氮源种类对絮凝活性的影响及菌株对实际重金属废水的絮凝作用。结果表明:以葡萄糖为碳源,酵母膏为氮源,菌体发酵液用量0.2 m L,助凝剂用量0.8 m L时,菌株QB1的絮凝性最高,可达到93%。其对多种重金属废水均具有较好的处理性能,对含铅废水的去除率最高可达99%以上。Abstract: High flocculating activity strains were screened and cultivated from activated sludge,water sediment,plant roots soil and strawberry planting soil. The flocculating activity of the strains was investigated by changing fermentation liquid dosage,coagulant dosage,carbon and nitrogen sources,and applied in the heavy metal wastewater treatment. The results showed that the strain QB1 can reach the highest flocculation rate of 93%,when using glucose as carbon source and yeast extract as nitrogen source,with the bacteria liquid dosage of 0. 2 mL,and coagulant dosage of 0. 8 mL. The removal rate of lead ion from the wastewater can be as high as 99% above.
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