水力停留时间对氧化沟处理农村污水的影响
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摘要
采用改进型氧化沟装置处理模拟农村生活污水,考察HRT对该系统脱氮除磷效果的影响。结果表明,随着HRT从14 h逐步缩短至8 h,COD和NH_4~+-N的去除率逐渐提高达到最大并维持稳定,TP的去除率显著提高但达到最大后有所下降。在进水COD为300 mg/L,NH_4~+-N、TP的质量浓度分别为40、3 mg/L时,采用HRT为10 h为优化运行条件时,系统对COD、NH_4~+-N和TP的去除率分别达到91%、96%和66%。出水COD和NH_4~+-N含量达到了GB18918-2002的一级A标准,表明装置针对农村污水处理具备可行性。
A improved oxidation ditch system was designed to treat simulated rural domestic sewage. The effect of HRT on nitrogen and phosphorus removal was investigated. The results showed that, with HRT shorted from 14 h to 8 h gradually, the removal rate of COD and NH_4~+-N increased to the maximum and kept stable, the removal of TP was significantly increased, but it decreased after reaching the maximum. When COD was 300 mg/L, mass concentration of NH_4~+-N and TP was 40 and 3 mg/L respectively in influent, and HRT was 10 h, the removal rate of COD, NH_4~+-N and TP reached 91%,96% and 66% respectively by this system. The content of COD and NH_4~+-N in effluent reached the first grade A standard of GB 18918-2002, which indicated the feasibility of the device for rural sewage treatment.
A improved oxidation ditch system was designed to treat simulated rural domestic sewage. The effect of HRT on nitrogen and phosphorus removal was investigated. The results showed that, with HRT shorted from 14 h to 8 h gradually, the removal rate of COD and NH_4~+-N increased to the maximum and kept stable, the removal of TP was significantly increased, but it decreased after reaching the maximum. When COD was 300 mg/L, mass concentration of NH_4~+-N and TP was 40 and 3 mg/L respectively in influent, and HRT was 10 h, the removal rate of COD, NH_4~+-N and TP reached 91%,96% and 66% respectively by this system. The content of COD and NH_4~+-N in effluent reached the first grade A standard of GB 18918-2002, which indicated the feasibility of the device for rural sewage treatment.
引文
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[28]刘灿灿,金吴云,沈耀良,等.HRT对瓷粒BAF处理生活污水效能的影响[J].环境科学与技术,2009,32(2):151-154.
[29]GUO M,HUANG J,HU H,et al.UV inactivation and characteristics after photoreactivation of Escherichia coli with plasmid:Health safety concern about UV disinfection[J].Water Research,2012,46(13):4031-4036.
[30]LV X M,SONG J S,LI J.et al.Reduction of excess sludge in a sequencing batch reactor by lysis-cryptic growth using quick lime for disintegration under low temperature[J].Environmental Technology,2017,38(15):1835-1842.
[31]城镇污水处理厂污染物排放标准:GB 18918-2002[S].
[2]张鑫,武瑞颖.我国北方农村水环境污染研究[J].环境工程,2015,33(s1):248-250.
[3]尹爱经,薛利红,杨林章,等.生活污水氮磷浓度对水稻生长及氮磷利用的影响[J].农业环境科学学报,2017,36(4):768-776.
[4]王昶,王莹,杨晓娇,等.曝气量对家庭生活污水处理净化槽的水质影响[J].农业环境科学学报,2014,33(7):1436-1441.
[5]曹蕾,陆继来,周军,等.江苏省太湖流域农村生活污水处理技术评价[J].环境科技,2015,28(1):24-27.
[6]JAROSZYNSKI L W,CICEK N,SPARLING R,et al.Impact of free ammonia on anammox rates(anoxic ammonium oxidation)in a moving bed biofilm reactor[J].Chemosphere,2012,88(2):188-195.
[7]GAO H,YIN H,DOU Y,et al.Simultaneous nitrogen and phosphorus removal using sequencing batch biofilm reactor and granular sludge process[J].China Water&Wastewater,2012,28(5):12-15.
[8]王涛,刘霞,周晓威,等.经济溶解氧在氧化沟节能运行中的应用研究[J].环境工程学报,2012,6(3):829-832.
[9]张朝升,林峰,荣宏伟,等.C/N对Carrousel 2000氧化沟同步脱氮除磷的影响研究[J].环境工程学报,2009,3(3):451-454.
[10]FAN J,LIANG S,ZHANG B,et al.Enhanced organics and nitrogen removal in batch-operated vertical flow constructed wetlands by combination of intermittent aeration and step feeding strategy[J].Environmental Science&Pollution Research,2013,20(4):2448-2455.
[11]LI W W,YU H Q,HE Z.Towards sustainable wastewater treatment by using microbial fuel cells-centered technologies[J].Energy&Environmental Science,2014,7(3):911-924.
[12]SAITO T,BRDJANOVIC D,VAN LOOSDRECHT M C.Effect of nitrite on phosphate uptake by phosphate accumulating organisms[J].Water Research,2004,38(17):3760-3768.
[13]WANG Z,WANG X,LI B,Et al.Nitritation and denitrifying phosphorus removal via nitrite pathway from domestic wastewater in a continuous MUCT process[J].Bioresource Technology,2013,143(9):187-195.
[14]LI N,HU Y,LU Y Z,et al.In-situ biogas sparging enhances the performance of an anaerobic membrane bioreactor(AnMBR)with mesh filter in low-strength wastewater treatment[J].Applied Microbiology&Biotechnology,2016,100(13):6081-6089.
[15]国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[16]杨彦飞,杨暖,薄涛,等.连续流微生物电解池处理有机废水同步生产甲烷[J].应用与环境生物学报,2015,21(5):854-859.
[17]许睿骁,李冰,张勇,等.压力环境下活性污泥的耐盐驯化过程[J].环境工程学报,2017,11(7):3952-3956.
[18]于凤庆,孙宝盛,陈谊,等.MBR活性污泥培养驯化过程中生物多样性研究[J].环境科学学报,2012,32(9):2084-2090.
[19]刘睿,高艳梅,王晓慧,等.水力停留时间对MFC-A2/O工艺处理生活污水的影响[J].环境科学学报,2017,37(2):680-685.
[20]YANG S F,LIN C F.WU C J,et al.Fate of sulfonamide antibiotics in contact with activated sludge--sorption and biodegradation[J].Water Research,2012,46(4):1301-1308.
[21]尹航,何理,卢健聪,等.水力停留时间对生物膜/颗粒污泥耦合工艺脱氮除磷的影响[J].化工学报,2014,65(6):2294-2300.
[22]HUANG X,LI W,ZHANG D,et al.Ammonium removal by a novel oligotrophic Acinetobacter sp.Y16 capable of heterotrophic nitrification-aerobic denitrification at low temperature[J].Bioresource Technology,2013,146(10):44-50.
[23]LENNON J T,JONES S E.Microbial seed banks:the ecological and evolutionary implications of dormancy[J].Nature Reviews Microbiology,2011,9(2):119-130.
[24]WANG X L,WANG S Y,PENG Y Z.Anoxic biological phosphorus uptake in A2O process[J].Chinese Journal of Chemical Engineering,2005,13(4):516-521.
[25]JIN L,ZHANG G,TIAN H.Current state of sewage treatment in China[J].Water Research,2014,66:85-98.
[26]HOU W,ZHOU H,SHI J,et al.Effects of carbon sources,temperature and hydraulic retention time on nitrate removal from groundwater[J].Journal of Zhejiang University,2014,40(3):314-321.
[27]WANG X M,WANG J L.Denitrification of nitrate-contaminated groundwater using biodegradable snack ware as carbon source under low-temperature condition[J].International Journal of Environmental Science&Technology,2012,9(1):113-118.
[28]刘灿灿,金吴云,沈耀良,等.HRT对瓷粒BAF处理生活污水效能的影响[J].环境科学与技术,2009,32(2):151-154.
[29]GUO M,HUANG J,HU H,et al.UV inactivation and characteristics after photoreactivation of Escherichia coli with plasmid:Health safety concern about UV disinfection[J].Water Research,2012,46(13):4031-4036.
[30]LV X M,SONG J S,LI J.et al.Reduction of excess sludge in a sequencing batch reactor by lysis-cryptic growth using quick lime for disintegration under low temperature[J].Environmental Technology,2017,38(15):1835-1842.
[31]城镇污水处理厂污染物排放标准:GB 18918-2002[S].