氯霉素合成废水厌氧生物处理的研究

Study of Anaerobic Biotreatment of Chloromycetin Wastewater

对氯霉素合成废水的厌氧生物处理作了研究。结果表明：（１）氯霉素合成废水的平均ＣＯＤ浓度高达３０６ｇ／Ｌ，但平均ＢＯＤ５浓度仅为７７２ｇ／Ｌ。ＢＯＤ５／ＣＯＤ比值为０２５３。从ＢＯＤ５／ＣＯＤ比值和降解动力学来评定，氯霉素废水属于生物处理可行性较难的工业废水。（２）石灰兼备中和酸性与去除一定量ＣＯＤ的双重作用，可用于该废水的预处理。（３）由于基质的抑制性，在反应器的操作中，应将废水ＣＯＤ浓度控在６０００ｍｇ／Ｌ以下。（４）反应器的运试结果良好。平均水力停留时间１００天；平均进水ＣＯＤ浓度４６１３ｍｇ／Ｌ；平均出水ＣＯＤ浓度１０６７ｍｇ／Ｌ；平均ＣＯＤ去除率７７％；ＢＯＤ５去除率达９５％以上；平均容积ＣＯＤ负荷和容积产气率分别为４６７ｋｇ／（ｍ３ｄ）和０９９ｍ３／（ｍ３ｄ），沼气的甲烷含量为７２％。

A study of anaerobic biotreatment of chloromycetin wastewater was carried out.The results showed that:(1) The average COD and BOD 5 concentration of chloromycetin wastewater were 30 6g/L and 7 72g/L,respectively.Judged by the ration of BOD 5 to COD and degradation kinetics,the wastewater was not easy to treat biologically.(2) Calcium oxide could remove some of the COD and neutralize the acid,and could therefore be used in the pretreatment.(3) Because of the inhibition from substrate,the inflow COD concentration should be controled below 6000 mg/L.(4) The anaerobic reactor performance was good and some operation parameters were as follows:average HRT 1 day;influent COD 4613 mg/L;effluent COD 1067 mg/L;average COD removal 77%;BOD 5 removal above 95%;average volumetric COD loading rate and volumetric biogas production rate 4.67 kg/(m 3 d) and 0.99m 3/(m 3·d) respectively;methane content of biogas 72%.