摘要
采用硫自养填充床反应器处理模拟高浓度高氯酸盐(Cl O-4)污染水,考察不同进水Cl O-4浓度及水力停留时间(HRT)下的Cl O-4降解特性.结果表明,HRT为12 h时,进水Cl O-4浓度由50 mg·L^(-1)增加到194 mg·L^(-1)时,Cl O-4能被完全降解;进水Cl O-4浓度为194 mg·L^(-1)时,HRT由12 h减少至4 h时,Cl O-4去除率仅为74%;SO_2-4的产量随着进水Cl O-4浓度与HRT的增加而增加;进水pH和碱度(以Ca CO_3计)分别为8.0和500 mg·L^(-1),出水pH和碱度(以Ca CO_3计)分别为6.7和100mg·L^(-1);反应器底部氧化还原电位(ORP)稳定在-380^-330 m V,反应器上部氧化还原电位(ORP)稳定在-300^-250m V.分子生物学分析表明,反应器内的菌群结构随高度的变化而变化,硫氧化菌Sulfurovum随反应器高度的增加而减少,由底部57.78%减少到上部的32.19%,同时硫化氢氧化菌Hydrogenophilaceae随反应器高度的增加而增加,由底部4.35%增加到上部的22.24%.
The effects of perchlorate concentration and hydraulic retention time（ HRT） on perchlorate reduction characteristics were investigated in a sulfur-based perchlorate reduction reactor. The results showed that the perchlorate was completely removed at HRT of12 h and the influent perchlorate concentration ranged from 50 mg·L^-1to 194 mg·L^-1; The perchlorate removal efficiency was 74% at HRT of 4 h and the influent perchlorate concentration was 194 mg·L^-1; The yield of sulfate was increased by increasing the influent perchlorate concentration and HRT; The influent pH and alkalinity was approximately 8. 0 and 500 mg·L^-1Ca CO3,and the effluent pH and alkalinity was approximately 6. 7 and 100 mg·L^-1Ca CO3,respectively; The oxidation reduction potential（ ORP） ranged from-380 m V to-330 m V at the bottom of the reactor,however,ORP ranged from-300 m V to-250 m V at the top of the reactor; The molecular biological analysis showed that the microbial consortium structure was different along the flow path in the reactor,Sulfurovum which is known to oxidize sulfur was decreased from 57. 78% to 32. 19% and Hydrogenophilaceae which is known to oxidize hydrogen sulfide was increased from 4. 35% to 22. 24%.
作者
张超
陶华强
宋圆圆
逯彩彩
郭延凯
廉静
郭建博
ZHANG Chao TAO Hua-qiang SONG Yuan-yuan LU Cai-cai GUO Yan-kai LIAN Jmg GUO Jian- bo(Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environment Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2017年第1期247-252,共6页
Environmental Science
基金
河北省应用基础研究计划项目(12966739D)
河北省杰出青年基金项目(E2012208012)
河北省高校百名优秀创新人才支持计划项目(BR2-211)
国家自然科学基金项目(51678387)
关键词
硫自养
高氯酸盐
水力停留时间(HRT)
氧化还原电位(ORP)
菌群分析
sulfur autotrophic
perchlorate
hydraulic retention time（HRT）
oxidation reduction potential（ORP）
consortium structure analysis
