摘要
针对高盐高浓度有机榨菜废水厌氧反应器微生物系统启动时间长的问题,探讨复合式厌氧反应器HAR(Hybrid Anaerobic Reactor)微生物系统的快速构建。结果表明,反应器在温度20～25℃,接种厌氧污泥质量浓度为30 g/L,废水盐度为1.8%(Cl^-计),负荷为1.5kgCOD/(m^3·d)的条件下,启动运行62 d后,可使进水COD为4 500mg/L的高盐榨菜废水出水COD为440 mg/L,去除率达到90.11%。反应器pH值为7.3～7.6,VFA小于300 mg/L,碱度为1 300～1 500 mg/L,氧化还原电位ORP小于-330 mV,反应器运行稳定,启动完成,反应器厌氧生物处理系统构建的时间大幅缩短。从中心区到第6反应区的COD降解速率依次降低,COD分担负荷分别为5.01 kgCOD/(m^3·d)、2.26 kgCOD/(m^3·d)、1.16 kgCOD/(m^3·d)、0.70 kgCOD/(m^3·d)、0.75kgCOD/(m^3·d)、0.29 kgCOD/(m^3·d)、0.20 kgCOD/(m^3·d),COD去除分担率分别为37.50%、22.16%、11.36%、6.82%、7.39%、2.84%、1.93%。SME监测表明,HAR反应器从中心区到第6反应区存在不同的优势微生物,中心区以甲烷八叠球菌、瘤胃甲烷短杆菌为主,外环第1至第6反应区以索氏甲烷菌为主。
The present paper is to introduce its investigative study on how to solve the slow start-up problem of the hybrid anaerobic reactor for treating the mustard tuber sewage and how to construct a highspeed removing-microbia systems in the HAR（Hybrid Anaerobic Reactor）. The effective volume of the reactor originally was 70 L, with its diameter of 0.3 m, 1.2 m o（ its height, filled with granular activated carbon of diameter of 0.6 0.9 mm. The experimental results show that at the temperature of 20- 25℃ and the inoculum anaerobic sludge concentration of 30 g/L, the influent nmstard tuber sewage tends to keep a salinity of 1.8 （Cl^-） loaded with 1.5 kgCOD/（m^3·d）, while the removal rate of the reactor was made to conlplete its start-up in a period of 62 d with its removing efficiency getting up to 90.11%. In such a situation, its reactor can have a sewage-treating power of the influent COD of 4 500 mg/L or that of 440 mg/L at a pH value of 7.3 - 7.6. At the same time, the device can be made to keep working steadily in a situation with less than 300 mg/L of VFA, 1 300 - 1 500 mg/L of alkalinity and less than - 330 mV of ORP. Besides, it was possible for the reactor to shorten the startup time and make the anaerobic biological treating system work at a much greater efficiency. And, in addition, the degradation rate can be made reduced as a result of pushing the COD from its central area to the sixth reaction one. In so doing, the COD load share can be made to reach 5.01 kgCOD/（m^3·d）, 2.26 kgCOD/（m^3·d）, 1.16 kgCOD/（m^3·d）, 0.70 kgCOD/（ m^3·d） , 0.75 kgCOD/（m^3·d）, 0.29 kgCOD/（m^3·d） and 0.20 kgCOD/（ m^3·d）, respectively, whereas the COD share removal rate can be made to reach 37.50% , 22.16%, 11.36%, 6.82%, 7.39%, 2.84% and 1.93% respectively. The results of the electronic microscope scanning indicate that different dominant microorganisms can be made to appear in the central area and the surrounding areas. Among them, the superior microorganisms of the central area wou
出处
《安全与环境学报》
CAS
CSCD
北大核心
2011年第3期41-45,共5页
Journal of Safety and Environment
基金
国家水体污染控制与治理科技重大专项(2008ZX07315-004)
关键词
环境工程学
高盐废水
厌氧污泥
启动
environmental engineering
salt water
anaerobicsludge
start-up
