摘要
在中温下,用125L的污泥床滤器(SBAF)和150L的结合式厌氧折流反应器(HABR)处理酒精蒸馏废水,最低水滞留期、最高COD负荷率、最高产气率、平均甲烷含量、氢分压分别为22h和35h,10.9kg_(CH_4-COD)/m^3·d和5.5kg_(CH_4-COD)/m^3·d,5.43m^3/m^3·d和3.06m^3/m^3·d,76％和74％,1.5×10^(-4)和4.0×10^(-4)atm.两者的COD去除率(根据负荷的高低)保持在78％～98％。SBAF运转稳定、高效,HABR能将甲烷八叠球菌存留于反应器内并能积累较多污泥。根据两种发酵器的运转过程和优势产甲烷茵的生理特性,可设计一种两步发酵器,使在不同阶段富集不同的乙酸裂解产甲烷菌,达到进一步提高处理效率的自的。
A 125 1 sludge bed anaerobic filter(SBAF) and a 150 1 hybridized anaerobic baffled reactors (HABR) are carried out to treat molassese stillage evaporator condensate wastewater in mesophilic condition(37℃).The lowest hydraulic retention times, the maximum COD loading rates, the maximum gas production rates, the methane contents of the overall performance, and hydrogen partial pressures are 22 h and 35h, 10.9kg_(CH_4-COD) /m^3·d and 5.5kg_(CH_4-COD)/m^3·d, 5.43m^3 / m^3.d and 3.06m^3/m^3·d, 76% and 74%, 1.5×10^(-4) and 4.0×10^(-4) atm respectively. The COD removal rates of 78%-98% in accordance with different loading rates for both reactors are reached. Stable operation and high treatment efficiency are obtained with SBAF reactor, while HABR can remain Methanosarcina and increase the biomass-retaining capacity. According to the results of the process and the physiological characteristics of predominant methanogens in this investigation, a two-phase reactor can be designed to enrich the different acetoclastic methanogens in different phase of the reactor in order to increase the treatmert efficiency further.
关键词
厌氧发酵器
酒精废水
结合式
甲烷
sludge bed anaerobic filter(SBAF), hybridized anaerobic baffled reactor (HABR), hydraulic retention times, COD loading rate, COD removal rate, hydrogen partial pressure.
