摘要
为探讨水力停留时间(HRT)对一体化膜生物反应器(SMBR)工艺处理效果的影响,以生活污水为研究对象,进行了实验室研究。结果表明,在溶解氧(DO)浓度为2～3mg·L-1的条件下,HRT为3,2和1h时,反应器对COD的去除率分别为89.3%～97.2%,88.5%～97.3%和80%～91.1%,出水COD浓度分别为38.9～11.2,41.6～10.8和63.4～35.8mg·L-1。若满足达标排放要求,建议一体式膜生物反应器的HRT控制在1h;若满足中水回用标准,则HRT建议控制在2h。实验同时考察了不同HRT条件下,活性污泥浓度(MLSS)对COD去除率的影响。结果表明,在试验条件下,一体化膜生物反应器中最佳污泥浓度应控制在6000mg·L-1左右。
In order to investigate the influence of hydraulic retention time (HRT) on the organic pollutants removal in the submerged membrane bioreactor (SMBR),a lab-scale experiment was conducted using domestic sewage as influent. The dissolved oxygen (DO)concentration was controlled at 2-3 mg·L-1 during all the experimental period. The experimental results demonstrated that when HRT was at 3 ,2 and 1 h ,the removal rates of COD were 89.3%-97.2%,88.5%-97.3% and 80%-91.1%,and the effluent COD were 38.9-11.2, 41.6-10.8 and 63.4-35.8 mg·L-1,respectively. The authors suggested that HRT of 1 h could meet the normal standard of discharged domestic sewage,and HRT of 2 h could meet that of water reclamation. In addition,the effect of activated sludge concentration (MLSS) on COD removal was also investigated. It was showed that the optimum MLSS was better controlled at around 6 000 mg·L-1 in SMBR.
出处
《东北农业大学学报》
CAS
CSCD
2004年第4期408-411,共4页
Journal of Northeast Agricultural University
基金
国家863计划项目(2002AA601310)
哈尔滨市科技攻关计划项目(0014211038)
