强化循环厌氧反应器(SCAR)处理碱减量废水的启动特性  

Start-up characteristic of strengthen circulation anaerobic reactor for treating alkali-minimization wastewater

作　　者：杨波[1] 张冉冉[1] 李方[1] 田晴[1] 马春燕[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《环境工程学报》2017年第1期322-328,共7页Chinese Journal of Environmental Engineering

基　　金：上海市自然科学基金资助项目(13ZR1401000)

摘　　要：强化循环厌氧反应器(SCAR)接种厌氧颗粒污泥后启动,在固定外回流比R=0.5、HRT=24 h条件下,研究SCAR处理碱减量废水的运行特性。经过6阶段60 d的启动运行,反应器对COD的去除率稳定在42%左右,反应器出水VFA浓度基本维持在约300 mg·L^(-1),反应器沿高度方向对污染物降解出现了较明显的功能区划。反应器2号取样口污泥脱氢酶活性最高、3号取样口浓度最低,脱氢酶活性最高为5.16 mg·(g·h)-1(以VSS计),系统污泥辅酶F420浓度基本为逐渐增加趋势,启动完成时辅酶F420浓度最高稳定在0.016 7μmol·g-1(以VSS计)。SCAR对碱减量废水中不同分子量有机物贡献的COD和UV254表现出不同的去除规律,实验条件下SCAR无法实现对苯系物的彻底降解。The start-up characteristics of a strength circulation anaerobic reactor（ SCAR） have been investigated for the treatment of alkali-minimization wastewater. The reactor was inoculated with anaerobic granular sludge to treat artificial alkali-minimization wastewater under the following conditions： treatment temperature of 33 to35 ℃,R of 0. 5,pH of 6. 8 to 7. 2,and hydrolytic retention time of 24 h. After 60 days of continuous operation in six stages,the results showed that the average COD removal rate reached 42%. The volatile fatty acid（ VFA）concentration was stable at approximately 300 mg·L- 1,and there was no evidence of VFA accumulation in the system. The reactor clearly decomposed the pollutants as they passed vertically through the system. After the start-up,the dehydrogenase concentration was highest in the second outlet of the reactor（ 5. 16 mg·（ g·h）- 1）（ calculated by VSS） and lowest in the third outlet. The growth of the coenzyme F420 was initially slow and then ceased,with the highest concentration being 0. 016 7 μmol·g- 1（ calculated by VSS）. The SCAR obeyed utilized different removal processes,both COD and UV254,for the organic compounds of the alkali-minimization wastewater with different molecular weights. SCAR cannot degrade benzene series completely under laboratory conditions.

关 键 词：强化循环厌氧反应器(SCAR) 碱减量废水 厌氧颗粒污泥 脱氢酶活性 辅酶F420 

分 类 号：X703.3[环境科学与工程—环境工程]