摘要
为研发适用于我国农村的分散式污水处理装置,采用UASB串联两级表面流人工湿地(FWS1、FWS2)的组合工艺处理农村生活污水。按照污水通过UASB的不同水力停留时间(HRT)共分4个阶段进行试验,探讨工艺对COD、BOD5、NH4+-N、TN、TP、SS的去除效果。结果表明,当UASB、FWS1、FWS2的HRT分别为2、45、64 h时,整个系统的综合处理效果最佳,对COD、BOD5、SS、NH4+-N、TN、TP的去除率分别为88%、96%、90%、77%、72%、98%。此外,随着UASB反应器HRT的缩短,对COD、BOD5、SS的去除率有降低趋势,当HRT为1 h时,对SS没有去除效果;NH4+-N、TN主要依靠湿地系统的植物转化及微生物的硝化反硝化作用来降解;UASB及人工湿地对TP的去除均起到重要作用。采用一级反应动力学方程计算COD、BOD5、SS、TP、NH4+-N、TN的一级反应速率常数(KV),均值分别为(0.23±0.09)、(0.22±0.03)、(0.18±0.09)、(0.25±0.09)、(0.09±0.03)、(0.11±0.03)d-1,并根据监测数据给出了一级反应速率常数与水温的关系式。
To develop decentralized sewage treatment devices suitable for rural areas in China,a combined technology of upflow anaerobic sludge blanket(UASB)and two-stage surface flow constructed wetlands(FWS1,FWS2)was applied to treat rural domestic sewage.The experiment was divided into four stages according to different hydraulic retention time(HRT)of sewage passing through the UASB,and the removal effect of COD,BOD5,NH4+-N,TN,TP and SS was explored.When the HRTs of UASB,FWS1 and FWS2 were 2 h,45 h and 64 h,respectively,the comprehensive treatment efficiency of the whole system was the best,and the removal rates of COD,BOD5,SS,NH4+-N,TN and TP were 88%,96%,90%,77%,72%and 98%,respectively.It was found that the removal efficiencies of COD,BOD5 and SS decreased with the shortening of HRT of UASB.The degradation of NH4+-N and TN mainly relied on the plant transformation and biological nitrification and denitrification of the wetland system.Both UASB and constructed wetlands played an important role in the TP removal.The first order reaction rate constants(KV)of COD,BOD5,SS,TP,NH4+-N and TN were calculated by using the first-order reaction kinetics,which were(0.23±0.09)d-1,(0.22±0.03)d-1,(0.18±0.09)d-1,(0.25±0.09)d-1,(0.09±0.03)d-1 and(0.11±0.03)d-1,and the relationship between the first-order reaction rate constant and water temperature was constructed.
作者
王晓云
蒋柱武
付爱民
WANG Xiao-yun;JIANG Zhu-wu;FU Ai-min(School of Ecological Environment and Urban Construction,Fujian University of Technology,Fuzhou 350008,China;Fujian Ningde Nuclear Power Co.Ltd.,Ningde 355200,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2020年第11期21-26,共6页
China Water & Wastewater
基金
国家自然科学基金资助面上项目(51878171)
福建省高校产学合作重大项目(2016H6003)。
关键词
农村分散式污水
升流式厌氧污泥床
人工湿地
水力停留时间
一级反应速率常数
rural domestic sewage
upflow anaerobic sludge blanket
constructed wetland
hydraulic retention time
the first-order reaction rate constant
