摘要
采用一体化膜-序批式生物反应器(SMSBR)处理焦化废水,初步研究表明:在水力停留时间(HRT)为32.7h,泥龄(SRT)为600d,平均COD容积负荷为0.45kg/(m3·d)的条件下,生物反应器上清液的COD难以降至100mg/L以下(平均为111.4mg/L),而通过膜的出水,COD可以稳定在100mg/L以下(平均为86.4mg/L),膜所截留的COD在后续的反应中得到进一步降解而未产生显著积累;在保证温度和碱度的情况下,出水NH3-N浓度低于1mg/L;硝酸盐细菌比亚硝酸盐细菌对温度的冲击更敏感,从而引起出水NO2-N的积累;系统在好氧反应阶段同时存在硝化和反硝化作用;膜分离对污泥的浓缩过程并未使剩余难降解有机物的去除得到强化,而膜污染速率在这一过程中表现较快。
The submerged membrane sequencing batch reactor (SMSBR) was used to treat coke wastewater. The result during the first month showed that: (1) the COD of supernatant in bioreactor was always above 100mg/ L, and the COD in membrane permeation could below 100mg/L steadily. This proved that the membrane could seem some organics. There was no sign that the COD in the bioreactor was accumulated, which implied that the organics stemmed were decomposed in the next period; (2) concentration of NH-N in effluent mainly depended on the alkalinity when temperature was moderate. When the excess alkalinity in effluent was above Σ3.5 mg/L, concentration of NH3-N in effluent could below Img/L.
出处
《上海环境科学》
CAS
CSSCI
CSCD
北大核心
2001年第1期24-27,共4页
Shanghai Environmental Sciences
基金
高等学校博士点基金项目
编号:522-0400-232009。
关键词
焦化
废水处理
一体化膜-序批式生物反应器
工艺流程
Coke wastewater Membrane Sequencing batch reactor Submerged membrane squencing batch reactor
