石化废水微好氧水解酸化与厌氧水解酸化的运行对比  

Comparative Study of Micro-aerobic and Anaerobic Hydrolysis Acidifications of Petrochemical Wastewater

作　　者：王佩超[1,2] 吴昌永[2] 周岳溪[2] 刘明国[2,3] 刘恒明[1] 刘诚[4] 

机构地区：[1]大连海洋大学海洋科技与环境学院,辽宁大连116032 [2]中国环境科学研究院水污染控制技术研究中心,北京100012 [3]中国地质大学(北京)水环境与资源学院,北京100083 [4]中国石油天然气股份有限公司吉林石化分公司污水处理厂,吉林吉林132021

出　　处：《环境工程技术学报》2013年第5期386-390,共5页Journal of Environmental Engineering Technology

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07201-005);国家自然科学基金项目(51208484)

摘　　要：以石化废水为研究对象,采用微好氧水解酸化与厌氧水解酸化进行对比试验,探讨微好氧条件对难降解工业废水水解酸化的影响。维持微好氧的溶解氧(DO)浓度为0.5 mg/L左右,厌氧反应器的ORP低于-300 mV。微好氧水解酸化对CODCr的平均去除率为25.0%,厌氧水解酸化对CODCr的平均去除率为23.5%;相对于厌氧水解酸化,微好氧水解酸化的UV254/CODCr低一些,对难降解的芳香有机物和含有共轭双键化合物的大分子处理效果更好。厌氧水解酸化的产酸量与酸化度稍高,这是由于微好氧水解酸化的传质效率高,氧气的存在使得产生的部分VFA同时被异养菌降解;厌氧水解酸化废水中SO42-浓度降低明显,而微好氧水解酸化的SO42-还原在一定程度上被抑制,SO42-浓度没有显著降低,比厌氧水解酸化更能降低恶臭有毒气体H2S的产生。在溶解氧控制适当的情况下,微好氧水解酸化更适合用于高含盐难降解石化废水的处理。Micro-aerobic and anaerobic hydrolysis acidifications of petrochemical wastewater were conducted and compared to investigate the influence of micro-aerobic condition on the high salt content and refractory industrial wastewater.The dissolved oxygen（DO） of micro-aerobic condition is about 0.5 mg/L,and the oxidation reduction potential（ORP） of anaerobic reactor is below-300 mV.The results showed that the average removal rate of CODCr with micro-aerobic hydrolysis acidification was 25.0%,while the average removal rate of CODCr with the anaerobic hydrolysis acidification was 23.5%.The rate of UV254 /CODCr with micro-aerobic hydrolysis acidification was higher than that of anaerobic hydrolysis acidification,indicating a higher removal of aromatic and conjugated double bond organics in micro-aerobic condition than in anaerobic condition.The acid production and acidification rate was higher in anaerobic condition than in micro-aerobic condition because part of produced acid could be used by heterotrophic bacteria simultaneously during the hydrolysis acidification.The SO42- in anaerobic reactor reduced obviously,while it did not decrease in micro-aerobic reactor because the activity of sulfate reducing bacteria was restrained by oxygen.Therefore,the micro-aerobic condition can decrease the production and emission of H2S.Micro-aerobic hydrolysis acidification is more suitable for high salt content and refractory petrochemical wastewater treatment if DO can be controlled properly.

关 键 词：石化废水 微好氧 水解酸化 硫酸盐还原 

分 类 号：X703.1[环境科学与工程—环境工程]