不同碳硫比条件下底物类型对硫酸盐去除的差异性  

Study on the Difference of Sulfate Removal with Different Substrates and COD_(Cr)/SO_4^(2-) Ratios

作　　者：张净瑞 朱葛夫[1,2] 潘小芳[1,2] 刘超翔[1,2] 黄栩[1,2] 刘琳[1,2] 

机构地区：[1]中国科学院城市环境研究所,福建厦门361021 [2]中国科学院宁波环境观测研究站,浙江宁波315800

出　　处：《环境工程技术学报》2015年第4期253-258,共6页Journal of Environmental Engineering Technology

基　　金：宁波市自然科学基金项目(2013A610177);国家自然科学基金项目(21276248;50808152;21477122);国家科技支撑计划项目(2012BAC25B04);厦门市科技计划项目(3502Z20120012)

摘　　要：为探索底物和碳硫比(COD_(Cr)/SO_4^(2-))对硫酸盐去除的影响,分别以乙醇、乳酸、丙酸、丁酸、乙酸为底物,采用静态试验考察了不同COD_(Cr)/SO_4^(2-)条件下利用不同底物去除硫酸盐的差异性。结果表明,在35℃条件下,COD_(Cr)/SO_4^(2-)为2.0时,硫酸盐还原菌(SRB)对乙醇的适应性最好;COD_(Cr)/SO_4^(2-)为2.5时,以乳酸、乙醇、丙酸为底物的系统中硫酸盐去除率分别可达90.29%、81.27%和80.69%;COD_(Cr)/SO_4^(2-)为3.0也可维持较高的硫酸盐去除率,以丁酸、乙酸为底物的系统中硫酸盐去除率分别可达88.78%和73.69%。研究表明,COD_(Cr)/SO_4^(2-)对SRB可利用的底物类型影响较大,根据底物类型选择最优的COD_(Cr)/SO_4^(2-),能够显著提高硫酸盐的去除效果,可为缩短厌氧脱硫反应器的启动时间提供新的思路。To explore the effects of COD_（Cr）/SO_4^（2-）and substrate on the removal of sulfate,the difference of the sulfate removal to five different substrates,i. e. lactic,ethanol,propionic,butyric and acetic,under different COD_（Cr）/SO_4^（2-）ratios was studied in the conical flask with static condition. Results reveal that SRB with the substrate of ethanol has higher affinity than any other substrates at the COD_（Cr）/SO_4^（2-）of 2. 0 at the temperature of 35 ℃.When the COD_（Cr）/SO_4^（2-）increases to 2. 5,the system with lactic,ethanol and propionate as substrate rapidly reaches high sulfate removal rate,being 90. 29%,81. 27% and 80. 69%,respectively. At the COD_（Cr）/SO_4^（2-）of3. 0,the system with butyrate and acetate as substrate has high sulfate-reducing rate,being 88. 78% and 73. 69%,respectively. It is shown that COD_（Cr）/SO_4^（2-）rate has significant effects on the consumption of different substrates in the anaerobic system. Therefore,keeping the system at optimal COD_（Cr）/SO_4^（2-）according to the substrates is an effective approach to increase the sulfate-reducing rate. This also provides a new thought to shorten the set-up time of anaerobic sulfate-reducing reactor.

关 键 词：碳硫比(CODCr/SO42-) 底物 硫酸盐去除率 硫酸盐还原菌(SRB) 产甲烷菌(MPB) 厌氧生物处理 

分 类 号：X703.1[环境科学与工程—环境工程]