摘要
为了实现深度脱氮除磷效果,利用生物吸附/MBR/硫铁自养反硝化组合工艺进行优化研究,考察了不同HRT和硫铁体积比对系统脱氮除磷的影响.结果表明,MBR池和硫铁自养反硝化滤池的HRT分别在9h和3h条件下,污染物去除效果最佳,63%的COD在生物吸附段被去除,工艺系统平均出水COD、NH_4^+-N、NO_3^--N、TN浓度分别为18.9,0.36,0,3.3mg/L,实现了污染物的超低排放.硫铁反硝化滤池的硫铁体积比为3:1条件下,出水TP平均浓度为0.29mg/L;其中大部分NO_3^--N在滤池高度10~30cm处被去除,脱氮速率约为46.1g NO_3^--N/(m^3·h).同时组合工艺在运行期间,采用间歇抽吸方式和较高曝气量能有效减缓膜污染进程.
In order to realize the effect of deep nitrogen and phosphorus removal,a combined biological adsorption-MBR-sulfur/iron autotrophic denitrification process was optimized,and the influence of HRT and volume ratio of sulfur-iron to nitrogen and phosphorus removal were both investigated.The experimental results showed that the optimal contaminants removal performance was achieved when the respective HRT of MBR and sulfur/iron autotrophic denitrification filter was 9h and 3h,and 63%of COD was adsorbed by biological adsorption process.The average effluent COD,NH4＋-N,NO3--N and TN were 18.9,0.36,0 and 3.3mg/L,respectively,which was beneficial for deep nitrogen and phosphorus removal.In addition,the average effluent TP was as low as 0.29mg/L as the volume ratio of sulfur and iron was 3：1 in the sulfur/iron autotrophic denitrification filter.Most of nitrate was reduced in the region of 10 to 30cm height in the sulfur/iron autotrophic denitrification filter,and the corresponding nitrogen removal rate was 46.1g NO3--N/（m3？h）.Furthermore,it was found that the membrane fouling could be effectively alleviated by providing intermittent suction to membrane module and high aeration rate to MBR process.
作者
支尧
张光生
钱凯
李激
王硕
ZHI Yao1, ZHANG Guang-sheng1,2,3, QIAN Kai1, LI Ji1,2,3, WANG Shuo1,2,3(1.School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;2.Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, China; 3.Jiangsu College of Water Treatment Technology and Material Collaborative Innovation Center, Suzhou 215009, Chin)
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2018年第6期2097-2104,共8页
China Environmental Science
基金
国家水体污染控制与治理科技重大专项(2015ZX07306001-05
2017ZX07202001-01)
关键词
生物吸附
膜污染
硫自养反硝化
化学除磷
biological adsorption
membrane fouling
sulfur autotrophic denitrification
chemical phosphorus removal
