摘要
榨菜废水常温两相厌氧处理工艺的调试具有高盐、常温厌氧启动难等不利条件。重庆某榨菜废水处理采用水解酸化//L氧接触氧化工艺,通过控制厌氧单元的pH值、驯化厌氧耐盐微生物、观察和分析厌氧接触池生物膜与产甲烷菌属、灵活调整两相厌氧反应器功能等方法,探讨了在进水COD浓度偏低的条件下,常温两相厌氧系统达到稳定运行的技术途径。调试结果表明,保持水解酸化池和厌氧接触池的pH值分别为(6.5~7.5)和(6.8~7.4)、容积负荷分别为1.31和0.17kgCOD/(m。·d)、盐度(以NaCl计)为1%左右,可使系统运行稳定,对COD的去除率约为75%.
High salinity and difficult start-up are common problems faced by commissioning of two- phase anaerobic biological process for treating mustard tuber production wastewater at ambient tempera- ture. The hydrolysis acidification/anaerobic contact oxidation process was applied to wastewater treatment in a mustard tuber production plant in Chongqing. Several approaches, such as controlling the pH of an- aerobic unit, domesticating anaerobic salt-tolerant microbes, analyzing biofilm and methanogens in anae- robic contact reactor and adjusting the function of two-phase anaerobic reactor, were investigated to a- chieve stable operation under low influent COD concentration. The commissioning results showed that the two-phase anaerobic biological process at ambient temperature could be operated stably, and the removal rate of COD was around 75% when pH and volumetric load of the hydrolysis acidification reactor were 6.5 to 7.5 and 1.31 kgCOD/( m3 . d). Those of the anaerobic contact reactor were 6.8 to 7.4 and 0.17 kgCOD/(m3 . d) respectively, and the salinity was about 1% (measured by NaC1).
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第17期5-10,共6页
China Water & Wastewater
关键词
高盐榨菜废水
两相厌氧工艺
常温
生产性调试
pH值
厌氧耐盐微生物
产甲烷菌属
high-salinity mustard tuber production wastewater
two-phase anaerobic biologicalprocess
ambient temperature
productive commissioning
pH
salt-tolerant anaerobic microbes