EGSB反应器在20℃下处理啤酒废水的工艺及微生物学研究  

Performance and Microbial Characteristics of an EGSB Reactor Treating Brewery Wastewater Under 20℃

作　　者：李津[1] 左剑恶[1] 邢薇[1] 

机构地区：[1]清华大学环境科学与工程系,北京100084

出　　处：《环境科学》2008年第4期990-995,共6页Environmental Science

基　　金：国家自然科学基金项目(50678091)

摘　　要：在20℃下连续运行厌氧膨胀颗粒污泥床(EGSB)反应器,对其处理模拟啤酒废水的工艺运行、污泥特性及微生物种群结构进行研究,结果表明:①HRT为18 h,经184 d的运行,EGSB反应器的有机负荷(以COD计)可达10 kg/(m3.d),COD去除率为85%以上,去除1 kg COD可产沼气0.58 m3;②随有机负荷逐渐提高,颗粒污泥粒径逐渐增大,沉降性能逐渐提高,但当负荷达到10 kg/(m3.d)时,颗粒污泥平均粒径有变小趋势;与中温厌氧污泥相比,低温污泥的胞外多聚物(ECP)总量有较大增加,其中蛋白质含量增加明显;③与接种污泥相比,在20℃下运行不同时期污泥中产甲烷菌的种类未发生明显变化,但接种同样颗粒污泥在15℃下运行6个月后污泥中的优势产甲烷菌种发生了明显的变化.A lab-scale EGSB reactor fed by artificial brewery wastewater was operated under 20℃ continuously,and its process performance,characteristics of granular sludge,microbial community structure were investigated.The results indicated that：①after 184 days＇ operation,the organic loading rate of EGSB reactor could reach 10kg/（m^3·d） at HRT of about 18 h,the COD removal efficiencies were above 85%,and the specific biogas production was about 0.58 m^3 per kilogram COD removed.②As the organic loading rate increased,the average diameter of the granule increased,and the settling velocity increased too,but when the loading rate reached about 10kg/（m^3·d）,the granular average diameter decreased slightly.Compared with the granular sludge operated at mesophilic condition,the ECP contents especially the protein contents in the granular sludge operated at 20℃ increased obviously.③Compared with the seed sludge,the main Archaea（methanogenes） species in the sludge samples operated at different loading rates under 20℃ did not change greatly,but the dominant methanogenes in the sludge operated under 15℃ for 6 months seeded with the same mesophilic sludge changed obviously.

关 键 词：EGSB反应器 胞外多聚物 种群结构 

分 类 号：X797[环境科学与工程—环境工程]