优质地表水源突发污染后长距离输水水质稳定性研究
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摘要
采用球墨铸铁管循环装置模拟长距离输水系统,研究优质地表水源万绿湖水在正常及分别受到藻类、氨氮、亚硝氮物质污染后主要水质指标的变化情况.试验结果表明,原水未受污染时,在输水过程中溶解氧呈下降趋势,氮类物质及浊度均维持在地表Ⅰ类水要求限值内;受到藻类污染后,溶解氧浓度下降,浊度、氮类物质均沿程升高;受到氨氮、亚硝氮污染后,由于管道生物膜的生物降解作用,氨氮和亚硝氮的去除率分别为61.79%和68.05%.综上,万绿湖水源在分别遭受藻类、氨氮、亚硝氮污染后均有溶解氧、余氯沿程下降和较为明显的亚硝氮积累,水质稳定性差.
The long-distance water conveyance system was simulated by a ductile iron pipe circulation device to study the changes of the main water quality indexes of the high-quality surface water source Wanlv Lake raw water after normal and separately contaminated by algae, NH+4~+-N and NO_2~--N. The test results showed that when the raw water was not contaminated, the DO showed a downward trend, and NH+4~+-N, NO_2~--N and turbidity were all maintained within the limits of the Surface Water Standard of Class Ⅰ requirements; when subjected to algae pollution, the DO concentration decreased and turbidity, NH+4~+-N and NO_2~--N increased along the course. When being polluted by NH+4~+-N and NO_2~--N, due to biodegradation of the biofilm of the pipeline, it showed great purification ability on NH+4~+-N and NO_2~--N, with removal efficiency respectively being 61.79% and 68.05%. In summary, the Wanlv Lake suffered from poor water quality stability after being contaminated by algae, NH+4~+-N and NO_2~--N, and all have decreased DO and residual chlorine concentration and obvious accumulation of NO_2~--N.
The long-distance water conveyance system was simulated by a ductile iron pipe circulation device to study the changes of the main water quality indexes of the high-quality surface water source Wanlv Lake raw water after normal and separately contaminated by algae, NH+4~+-N and NO_2~--N. The test results showed that when the raw water was not contaminated, the DO showed a downward trend, and NH+4~+-N, NO_2~--N and turbidity were all maintained within the limits of the Surface Water Standard of Class Ⅰ requirements; when subjected to algae pollution, the DO concentration decreased and turbidity, NH+4~+-N and NO_2~--N increased along the course. When being polluted by NH+4~+-N and NO_2~--N, due to biodegradation of the biofilm of the pipeline, it showed great purification ability on NH+4~+-N and NO_2~--N, with removal efficiency respectively being 61.79% and 68.05%. In summary, the Wanlv Lake suffered from poor water quality stability after being contaminated by algae, NH+4~+-N and NO_2~--N, and all have decreased DO and residual chlorine concentration and obvious accumulation of NO_2~--N.
引文
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[3]杜青平,陈展明,李彦旭,等.活性炭含量对PVA-SA固定化小球处理氯苯微污染废水的影响[J].广东工业大学学报,2017,34(4):22-26.DU Q P,CHEN Z M,LI Y X,et al.Effects of activated carbon in sodium alginate and polyvinylacohol immobilization pellets of Penicillium sp.on chlorobenzene removal[J].Journal of Guangdong University of Technology,2017,34(4):22-26.
[4]倪婉敏.湖库藻华监测与微囊藻毒素细胞毒性风险评价方法研究-以杭州青山湖水库为例[D].杭州:浙江大学,2012,1-2.
[5]唐代军,王志红,邹祥俊,等.络合铁形态和浓度对两种典型淡水藻增殖的影响及对比分析[J].广东工业大学学报,2018,35(1):67-72.TANG D J,WANG Z H,ZOU X J,et al.Effect and comparative analysis of complex iron form and concentration on the growth of two species of freshwater algae[J].Journal of Guangdong University of Technology,2018,35(1):67-72.
[6]仇永婷,王志红,刘立凡,等.水华鱼腥藻在不同络合态铁环境下的增殖规律[J].广东工业大学学报,2017,34(2):48-53.QIU Y T,WANG Z H,LIU L F,et al.Growth regularity of anabaena flos-aquae in different complex iron environment[J].Journal of Guangdong University of Technology,2017,34(2):48-53.
[7]环境保护部.中国环境状况公报[M].北京:环境保护部,2013,13-20.
[8]孙俊峰,康雅.水泥砂浆内衬管通水初期对水质的影响及应对措施[J].中国给水排水,2015,31(7):46-49.SUN J F,KANG Y.Study on initial impact of cement mortar lining on water quality and its control measures[J].China Water&Wastewater,2015,31(7):46-49.
[9]赵乐乐,李星,杨艳玲,等.南洲水厂原水长距离输水管道水质变化规律研究[J].中国给水排水,2014,30(15):70-72.ZHAO L L,LI X,YANG Y L,et al.Study on water quality variation in long-distance water delivery pipeline of Nanzhou Water Treatment Plant[J].China Water&Wastewater,2014,30(15):70-72.
[10]张达,杨艳玲,李星,等.原水水质对输水管道硝化作用形成的影响[J].中国环境科学,2014,34(2):359-363.ZHANG D,YANG Y L,LI X,et al.Effect of raw water quality on formation of nitrification in water distribution pipes[J].China Environmental Science,2014,34(2):359-363.
[11]张达,杨艳玲,李星,等.溶解氧对长距离输水管道水质影响[J].化工学报,2014,65(4):1424-1428.ZHANG D,YANG Y L,LI X,et al.Effect of dissolved oxygen on water quality in long distance pipeline transportation[J].CIESC Journal,2014,65(4):1424-1428.
[12]朱永娟,杨艳玲,李星.长距离输水管道微生物存在水平及水质变化规律[J].中国给水排水,2012,28(21):34-36.ZHU Y J,YANG Y L,LI X.Occurrence of microorganism and variation of water quality in long distance water delivery pipeline[J].China Water&Wastewater,2012,28(21):34-36.
[13]LUO J H,LIANG H,YAN L J,et al.Microbial community structures in a closed raw water distribution system biofilm as revealed by 454-pyrosequencing analysis and the effect of microbial biofilm communities on raw water quality[J].Bioresour Technol,2013,148:189-195.
[14]杨艳玲,张达,李星,等.原水输送管道生物净水效能[J].哈尔滨工业大学学,2014,46(10):106-116.YANG Y L,ZHANG D,LI X,et al.Biological purification efficiency in raw water delivery pipelines[J].Journal of Harbin Institute of Technology,2014,46(10):106-116.
[15]李颖,施择,张榆霞,等.关于用藻密度对蓝藻水华程度进行分级评价的方法和运用[J].环境与可持续发展,2014(2):67-68.LI Y,SHI Z,ZHANG Y X,et al.Evaluation method and application on Cyanobacteria bloom degree classification with algal density[J].Environment and Sustainable Development,2014(2):67-68.
[16]曲志军,尤作亮,徐洪福.原水水质在管道输送中的变化规律[J].供水技术,2007,1(2):5-9.QU Z J,YOU Z L,XU H F.Variation of raw water quality in distribution pipes[J].Water Technology,2007,1(2):5-9.
[17]赵乐乐,李星,杨艳玲,等.预氯化对原水长距离输水管道硝化性能的破坏与恢复[J].化工学报,2013,64(4):1403-1407.ZHAO L L,LI X,YANG Y L,et al.Destruction and restorative of nitrification performance in aqueduct by pre-chlorination[J].CIESC Journal,2013,64(4):1403-1407.
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