干粉煤气化废水中酚类物质的微生物毒性及其降解途径研究  

Study on microbial toxicity and degradation pathway of phenolic substance in dry powder coal gasification wastewater

作　　者：代军 Dai Jun(Coal to Liquids Company of CHN Energy Ningxia Coal Industry Co.,Ltd.,Yinchuan Ningxia 750011,China)

机构地区：[1]国家能源集团宁夏煤业有限责任公司煤制油分公司,宁夏银川750011

出　　处：《煤化工》2024年第3期74-77,共4页Coal Chemical Industry

摘　　要：针对现有废水处理技术对煤气化含酚废水的处理难以满足煤化工行业发展需要的问题,考察了厌氧和兼氧条件下酚类物质对微生物的毒性及其生物降解性。结果表明:挥发酚质量浓度在300 mg/L以上会显著抑制厌氧污泥的活性;质量浓度低于1000 mg/L的挥发酚对兼氧微生物活性不产生抑制,可以通过兼氧反应降解挥发酚和COD;挥发酚和COD的降解速度与氧化还原电位(ORP)有关,ORP越高,挥发酚和COD的降解速度越快,反应平衡时,COD去除率为60%~70%。In view of the problem that the existing coal gasification phenol-containing wastewater treatment technology is hard to meet the development needs of the coal chemical industry,the toxicity and biodegradability of phenolic substances towards microorganisms under anaerobic and facultative conditions were investigated in the study.The results showed that volatile phenol concentration above 300 mg/L could significantly inhibit the activity of anaerobic sludge.Volatile phenol concentration below 1000 mg/L did not inhibit the activity of facultative microorganisms and could degrade volatile phenols and COD through oxygenic reaction.The degradation rate of volatile phenol and COD was related to ORP.The higher the ORP,the faster the degradation rate of volatile phenol and COD,and the COD removal rate was 60%-70%when the reaction was balanced.

关 键 词：干粉煤气化 含酚废水 厌氧降解性 兼氧降解性 挥发酚 COD 

分 类 号：X703[环境科学与工程—环境工程]