常温下加装脱硫装置的MCAnMBR处理高硫酸盐有机废水试验  

Methane Cycle Anaerobic Membrane Bioreactor with Desulfurization for Treating High Sulfate Organic Wastewater at Normal Temperature

作　　者：徐婷[1,2] 金艳青[1,2] 李勇[1,2] 

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]苏州科技大学环境生物技术研究所,苏州215009

出　　处：《环境科学》2017年第12期5132-5138,共7页Environmental Science

摘　　要：研究了加装脱硫装置的沼气循环厌氧膜生物反应器对含高硫酸盐有机废水的处理效能.在26~34℃的室温下,历时63d成功地启动了加装脱硫装置的MCAnMBR反应器.调试初期,通过调节气路平衡和采用甲醇驯化的方法有效解决了MCAnMBR反应器在处理高硫酸盐有机废水时存在的跑泥和pH上升问题.结果表明,当控制HRT为120 h,有机负荷(以COD计)为3.61~4.36 kg·(m^3·d)^(-1),pH为7.18~7.61时,在23.3~25.4℃的室温下,对含SO_4^(2-)浓度为650~5 800 mg·L^(-1)的有机废水处理效果极佳,出水COD浓度最低可至23 mg·L^(-1),COD总去除率稳定在96.23%~99.77%,SO_4^(2-)还原率可达83.83%~95.51%.说明加装脱硫装置可有效解决硫化物的次级抑制作用问题,且通过梯度试验发现本反应器处理高硫酸盐有机废水的上限为:COD浓度18 000~21 000mg·L^(-1)、SO_4^(2-)浓度9082~9600 mg·L^(-1),COD/SO_4^(2-)为2.The operational performance of a methane cycle anaerobic membrane bioreactor （MCAnMBR） with desulfurization for the treatment of high sulfate organic wastewater was investigated. Within 63 days, the MCAnMBR with desulfurization was started successfully at a normal temperature of 26-34℃ . The two main problems at the beginning of debugging, sludge loss and increased pH, were effectively solved by adjusting the gas path system and adding methanol to the inflow for acclimation. The results show that the inflow concentration of SO2 -4 from 650 mg·L - 1 to 5800 mg·L - 1 can be treated well with the conditions of hydraulic retention time （HRT） = 120 h, a volume loading of 3. 61-4. 36 kg·（m3·d） - 1 , pH of 7. 18-7. 61, and temperature of 23. 3-25. 4℃ . The effluent chemical oxygen demand （COD） concentration could be lowered to 23 mg·L - 1 . The total removal rate of COD could remain stable at 96. 23% -99. 77% , and the SO2 -4 conversion rate was about 83. 83% -95. 51% . These results indicated that the MCAnMBR reactor with desulfurization could effectively solve the problem of secondary sulfide inhibition. A gradient experiment revealed that the high Na2 SO4 inflow could be treated when the influent COD ranged from 18000 mg·L - 1 to 21000 mg·L - 1 , the concentration of SO2 -4 ranged between 9082 mg·L - 1 and 9600 mg·L - 1 , and the COD/ SO2 -4 = 2.

关 键 词：沼气循环 厌氧膜生物反应器 高硫酸盐有机废水 H2S抑制 碳硫比 

分 类 号：X703.1[环境科学与工程—环境工程]