HRT对EGSB反应器处理低浓度有机废水的影响  

Effect of HRT on treatment of low concentration organic wastewater by EGSB reactor

作　　者：邵文歆 刘杰[1] 伏小勇[2] 郭一令[1] SHAO Wenxin;LIU Jie;FU Xiaoyong;GUO Yiling(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266525,China;School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266525 [2]兰州交通大学环境与市政工程学院,兰州730070

出　　处：《青岛理工大学学报》2023年第3期9-14,41,共7页Journal of Qingdao University of Technology

基　　金：国家自然科学基金资助项目(52174336)。

摘　　要：以果糖工业的生产废水(COD=1400~2000 mg/L)为试验用水,研究膨胀颗粒污泥床(EGSB)反应器处理低浓度有机废水时,水力停留时间(HRT)对系统的运行效果、产气性能以及厌氧微生物生长的影响。结果表明,在37℃、HRT为36 h的条件下,反应器启动并稳定后的COD去除率在70%左右。在HRT由36 h缩短至9 h的过程中,COD去除率呈现出先上升后下降的趋势;HRT为18 h时,COD去除率最高,可达80%;当HRT缩短至9 h时,COD去除率降至65%左右。去除单位COD产生的沼气量随着HRT的缩短而有所升高,但在达到峰值后不再随着HRT的缩短而上升。HRT为18 h时,去除单位COD所产生的沼气量达到峰值,在0.5 m 3/kg COD左右。在HRT为36 h以及24 h条件下运行了23 d后,EGSB反应器内的污泥浓度不增反降,污泥量减少了约1/5,之后随着HRT的缩短,污泥浓度停止下降并有增长的趋势。Taking the fructose industrial wastewater(COD=1400-2000 mg/L)as the test water,this study investigated the impacts of hydraulic retention time(HRT)on the operation performance,gas production performance and anaerobic microbial growth of Expanded Granular Sludge Bed(EGSB)reactor for treating low concentration organic wastewater.The results showed that the COD removal rate was about 70%after the reactor was started and stabilized at 37℃and HRT of 36 h.With a gradual decrease in the HRT from 36 h to 9 h,the COD removal rate first increased and then decreased.When the HRT was 18 h,the COD removal rate was the highest,up to 80%.When the HRT was shortened to 9 h,the COD removal rate decreased to about 65%.The amount of biogas generated by removing unit COD increased with the shortening of HRT,but no longer increased after reaching the peak.When the HRT was 18 h,the amount of biogas generated by removing unit COD reached the peak value of about 0.5 m 3/kg COD.After 23 days of operation at HRT of 36 h and 24 h,the sludge concentration in the EGSB reactor did not increase but decreased.The amount of sludge decreased by about 1/5.After that,with the shortening of HRT,the sludge concentration stopped decreasing and had an increasing trend.

关 键 词：EGSB反应器 低浓度有机废水 HRT COD去除率 沼气产量 污泥浓度 

分 类 号：X703.1[环境科学与工程—环境工程]