| 混合硫酸盐还原菌与Cu/Fe颗粒协同处理含铬废水的研究 |
| 摘要点击 4077 全文点击 2384 投稿时间：2010-08-11 修订日期：2010-11-01 |
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| 中文关键词 硫酸盐还原菌 Cu/Fe颗粒 Cr(Ⅵ) 还原 废水 厌氧 |
| 英文关键词 sulfate reducing bacteria copper-iron bimetallic Cr(Ⅵ) reduction wastewater anaerobic |
| DOI 10.13227/j.hjkx.20110721 |
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| 中文摘要 |
| 利用化学沉淀法制备Cu/Fe双金属颗粒，并从工业污泥中驯化得耐Cr(Ⅵ)硫酸盐还原菌厌氧混合菌群（SRB），将两者协同处理含Cr(Ⅵ)废水.研究比较了SRB-Cu/Fe体系与传统SRB体系、Cu/Fe体系处理废水的效果，并探讨了不同QCu/Fe、pH值对SRB-Cu/Fe体系处理效果的影响.结果表明，SRB-Cu/Fe体系的处理效果明显优于SRB或Cu/Fe体系的效果.Cu/Fe双金属颗粒的参与不仅明显缩短了SRB的适应期,提高了硫酸盐、Cr(Ⅵ)的还原速率，而且显著增强了SRB对 Cr(Ⅵ)耐受性，其耐铬能力提高了200%（从100mg·L-1增加到300mg·L-1）.在 Cr(Ⅵ)浓度为300mg·L-1、Cu/Fe双金属颗粒比值（QCu/Fe）为7.5%、pH为5.0～8.0条件下，室温处理48 h后，出水的 Cr(Ⅵ)浓度低于0.071mg·L-1，总铬浓度低于0.512mg·L-1， Cu浓度接近于0.本研究新构建的SRB-Cu/Fe体系处理效果显著，兼具生物和化学处理的优点，在含铬废水的处理中具有广阔的应用前景. |
| 英文摘要 |
| Copper-iron bimetallic particles were prepared by chemical precipitation technique. Under the help of the particles Cr(Ⅵ)-containing wastewater was well treated by a consortium of sulfate reducing bacteria, which were enriched from industrial wastewater and acclimatized to tolerant to high concentrations of Cr(Ⅵ). SRB-Cu/Fe system, traditional SRB system and Cu/Fe system were experimented in the batch bioreactor, respectively. It is demonstrated that SRB-Cu/Fe bimetallic system perform much better than traditional SRB system or copper-iron bimetallic. The acclimation period of SRB was significantly reduced and the inhibiting concentration of Cr(Ⅵ) of SRB was also greatly increased by approximately 200% (from 100mg·L-1 to 300mg·L-1). Under the conditions of Cr(Ⅵ) 300mg·L-1, QCu/Fe 7.5%, pH 5.0-8.0, the concentration of total chromium was less than 0.512mg/L, Cr(Ⅵ) less than 0.071 mg, Cu next to zero after 48 h treatment. Having biological, chemical advantages and high efficiency, the novel SRB-Cu/Fe system should have the broad application prospects in industrial wastewater. |
