| 硫酸盐还原生物滤池对含镉废水去除效果试验研究 |
| 摘要点击 1710 全文点击 1201 投稿时间：2013-08-28 修订日期：2013-11-12 |
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| 中文关键词 硫酸盐还原菌 含镉废水 生物滤池 滤速 包埋固定化 |
| 英文关键词 sulfate-reducing bacteria(SRB) Cd(Ⅱ)-bearing wastewater biological filter filtration rate embedded immobilization |
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| 中文摘要 |
| 在18.0~22.3℃ 条件下，以含镉（Cd2+）废水为研究对象，首先对分离纯化出的硫酸盐还原菌（SRB）采用细胞包埋固定化技术同沸石填料制成具有生物活性的载体，建立硫酸盐还原生物滤池，培养驯化完成后进行了生物滤池对废水中Cd2+、COD和SO42-的去除效果试验研究.结果表明，利用SRB采用生物滤池的运行方式可以对废水中的重金属镉（Cd2+）进行良好地去除.当滤速（V）=0.4 m·h-1时，生物滤池对进水Cd2+浓度≤15 mg·L-1的废水处理效果最好.在稳定运行期间，生物滤池对Cd2+、COD和SO42-的去除率分别在99%、75%和50%以上，经过生物滤池处理后出水中Cd2+含量低于0.1 mg·L-1，达到国家《污水排入城镇下水道水质标准》（CJ 343-2010）中对Cd2+的排放要求.生物滤池对Cd2+、COD和SO42-的去除效果主要集中在60 cm以上的空间.当V<0.6 m·h-1时，滤池对Cd2+有高效稳定的去除效果. |
| 英文摘要 |
| At the temperature of 18.0-22.3℃, biological carriers were produce from pure SRB and zeolite by the embedding immobilized method, and a sulfate-reducing biological filter filled with filter carriers was built to treat cadmium-containing wastewater. Experimental research on removal efficiency of Cd2+, COD and SO42- in wastewater by the biological filter was carried out after SRB domestication. Results show that cadmium can be removed satisfactorily from wastewater using SRB by the biological filter filled with sulfate-reducing bacteria. When the filtration rate was 0.4 m·h-1 and the cadmium concentration in wastewater was not more than 15 mg·L-1, the processing efficiency was the best. In the formal running period, the removal rates of Cd2+, COD and SO42- by the biological filter were more than 99%, 75% and 50%. The effluent Cd2+ concentration was less than 0.1 mg·L-1,which could meet the cadmium emission requirements in the wastewater quality standards for discharge to municipal sewers(CJ 343-2010). The removal of Cd2+, COD and SO42- by biological filter mainly occurs in the top 60 cm of the filter bed during stable operation. When the filtration rate was less than 0.6 m·h-1, Cd2+ can be removed by the biological filter with high efficiency and stability. |
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