EGSB反应器处理含氯苯有机废水的试验研究

在间歇条件下,针对未接触和接触过氯苯的颗粒污泥,研究了氯苯对它们产甲烷活性的抑制及恢复;在动态条件下,研究了EGSB反应器处理含氯苯有机废水的情况.结果表明,不同浓度的氯苯均会对未接触氯苯的颗粒污泥的活性产生抑制;而接触过氯苯的颗粒污泥具有一定适应能力,只有氯苯浓度为100mg/L时才有较明显抑制.在动态运行过程中,进水氯苯浓度为10～50mg/L,前65天出水氯苯浓度均低于7mg/L,66d后出水氯苯浓度突增至25mg/L以上,停止投加氯苯后,出水氯苯浓度在3.4～38.32mg/L之间无规律波动,说明反应器内颗粒污泥对氯苯有较强吸附,生物降解作用不明显.

Experimental Study on the Treatment of Organic Wastewater Containing Chlorobenzene by Using an EGSB Reactor

In this paper, the study on the inhibition and recovery of the methanogenic activity of the granular sludge which uncontacted and contacted with chlorobenzene caused by chlorobenzene, and the study of the treatment of organic wastewater containing chlorobenzene by using an EGSB reactor were conducted. The results showed that the activity of the granular sludge which had not contacted with chlorobenzene would be inhibited by different concentrations chlorobenzene; but for the granular sludge which had contacted with chlorobenzene, its activity would be inhibited only by higher concentration (100 mg/L) chlorobenzene. Using EGSB reactor to treat organic wastewater containing chlorobenzene, when the influent chlorobenzene concentration was about 10-50 mg/L, the effluent concentration was lower than 7 mg/L before 65 days, but after the 66th day, the effluent concentration suddenly reached above 25 mg/L, and after stopping adding chlorobenzene, the effluent chlorobenzene concentration was between 3.4-38.32 mg/L, this showed that the high chlorobenzene removal efficiency was mainly due to the strong adsorption by granular sludge, and the biological degradation of chlorobenzene was not obvious.