摘要
针对高盐榨菜腌制废水生物处理过程中微生物系统难于构建的问题,研究了采用逐步驯化法构建高盐微生物处理系统的可行性及投加甜菜碱对高盐条件下生物脱氮系统建立的影响。试验结果表明:采用每次提高进水盐度为0.5%(以NaCl计)的逐步驯化方法,可建立能适应盐度为7%(以NaCl计)的高盐微生物处理系统,优势菌群为杆状嗜盐菌;在温度为25℃、DO为5mg/L、有机负荷为1.0 kgCOD/(m3.d)时,反应器对COD的去除率达到了97.4%;投加甜菜碱对高盐环境下硝化菌及反硝化菌的培养具有促进作用,缩短了生物硝化及反硝化系统的构建时间。
In order to solve the difficult problems in the establishment of microbiological system during the treatment of high-salinity mustard tuber wastewater, the feasibility of establishing high-salinity microbiological treatment system by progressive domestication method and the effect of betaine addition on the establishment of biological nitrogen removal system under high-salinity condition were investigated. The result shows that under the progressive domestication process, in which inflow salinity is periodically increased by 0.5% （ calculated as NaCl） , a high-salinity microbiological treatment system can be established to endure salinity level of 7% （calculated as NaCl） , and the predominant microorganisms are the bacilliform halophiles. Under the temperature of 25 ℃ , the DO of 5 mg/L and the organic loading of 1.0 kgCOD/（m^3 · d） , the COD removal rate reaches 97.4%. Furthermore, the addition of betaine can accelerate the cultivation of nitrobacteria and denitrifying bacteria in high-salinity environment and shorten the time of forming biological nitrification and denitrification systems under high-salinity condition.
出处
《中国给水排水》
CAS
CSCD
北大核心
2007年第15期17-20,25,共5页
China Water & Wastewater
基金
重庆科委攻关项目(7986)
关键词
榨菜废水
高盐
微生物系统构建
逐步驯化法
mustard tuber wastewater
high salinity
establishment of microbiological system
progressive domestication process
