SBR工艺处理校园生活污水回用研究
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摘要
随着水资源的供需矛盾和水环境日趋恶化等现象的出现,实行校园中水回用是最经济、最可靠、见效最快的办法。校园小区生活污水水量稳定、污染物组成较单一,就地可取进行二次利用,能够缓解城市缺水的现状。本文通过对江西九江学院SBR+过滤+ClO_2消毒中水回用工程的调试和运行,结果表明
(1)采用SBR+过滤+ClO_2消毒工艺处理校园生活污水,整套工艺对COD的平均去除率为90.5%;对SS的平均去除率达到94.9%;对NH_4~+-N的去除效率为68.9%。出水水质可以达到《城市杂用水水质标准》(GB/T18920-2002),用于校园冲厕、道路清扫、消防、校园绿化、车辆冲洗、建筑施工等;
(2)在保证反应器内溶解氧浓度为2-3mg/L的条件下,选择曝气反应时间为2h较为经济;
(3)SBR反应器的COD去除速率与温度之间的变化关系为:r_T=123.43×1.0022~((T-20)),20℃时的COD去除速率r_(20)=123.43 mg/(L·h),反应器的温度系数Θ=1.0022;
(4)SBR反应器稳定运行期间,系统的SV保持在20-40%左右,SVI保持在80mL/g之间。
(5)SBR反应器对污染物的降解为一级反应,反应器对基质的降解动力学模型为:(?);
(6)该工艺的运行费用:不计设备折旧,运行费用为0.46元/(m~3废水);计设备折旧费,运行费用为0.675元/(m~3废水)。
As the contradiction between supply and demand of water resources and waterenvironment deterioration, campus water reuse is the most economical, most reliableand fastest way to bear fruit. School campus sewage has stability quality and simplecomposition of pollutants, can be used to reuse to relieve the status of water shortagein cities. This paper studied the debugging and operation of the water treatmentproject in Jiujiang institute, the research shows as follows:
1 The treatment SBR, filtration, disinfection process was used treat the campussewage for reusing. This treatment have 95.5% COD removal rate, 94.9% SS removalrate and 68.9% NH_3-N removal rate. The effluent quantity can reach the WaterQuality Standard for Urban Water Consumption (GB/T18920-2002.) and is used forcampus flushing, road cleaning, fire fighting, campus greening, vehicle washing,construction, etc.
2 The condition of 2 to 3 mg/L DO concentration and 2 hours aeration time, isthe most economize operational condition.
3 The relationship between COD removal rate and temperature in SBR reactoraccord with the equation r_T=123.43×1.0022~((T-20)).The COD removal kinetic equationis r_(20)=123.43 mg/(L·h) and the temperature coefficient isΘ=1.0022, at thetemperature of 20℃.
4 The SV and SVI are 20-40% and 80mL/g respectively at SBR reactor steadyoperation time.
5 The kinetic equation accord with the first order reaction. The kinetic model ofthe substance degradation is (?);
6 The running expense is 0.46 yuan/m~3 excluding equipment depreciation, and0.675 yuan/m~3 including equipment depreciation
(1)采用SBR+过滤+ClO_2消毒工艺处理校园生活污水,整套工艺对COD的平均去除率为90.5%;对SS的平均去除率达到94.9%;对NH_4~+-N的去除效率为68.9%。出水水质可以达到《城市杂用水水质标准》(GB/T18920-2002),用于校园冲厕、道路清扫、消防、校园绿化、车辆冲洗、建筑施工等;
(2)在保证反应器内溶解氧浓度为2-3mg/L的条件下,选择曝气反应时间为2h较为经济;
(3)SBR反应器的COD去除速率与温度之间的变化关系为:r_T=123.43×1.0022~((T-20)),20℃时的COD去除速率r_(20)=123.43 mg/(L·h),反应器的温度系数Θ=1.0022;
(4)SBR反应器稳定运行期间,系统的SV保持在20-40%左右,SVI保持在80mL/g之间。
(5)SBR反应器对污染物的降解为一级反应,反应器对基质的降解动力学模型为:(?);
(6)该工艺的运行费用:不计设备折旧,运行费用为0.46元/(m~3废水);计设备折旧费,运行费用为0.675元/(m~3废水)。
As the contradiction between supply and demand of water resources and waterenvironment deterioration, campus water reuse is the most economical, most reliableand fastest way to bear fruit. School campus sewage has stability quality and simplecomposition of pollutants, can be used to reuse to relieve the status of water shortagein cities. This paper studied the debugging and operation of the water treatmentproject in Jiujiang institute, the research shows as follows:
1 The treatment SBR, filtration, disinfection process was used treat the campussewage for reusing. This treatment have 95.5% COD removal rate, 94.9% SS removalrate and 68.9% NH_3-N removal rate. The effluent quantity can reach the WaterQuality Standard for Urban Water Consumption (GB/T18920-2002.) and is used forcampus flushing, road cleaning, fire fighting, campus greening, vehicle washing,construction, etc.
2 The condition of 2 to 3 mg/L DO concentration and 2 hours aeration time, isthe most economize operational condition.
3 The relationship between COD removal rate and temperature in SBR reactoraccord with the equation r_T=123.43×1.0022~((T-20)).The COD removal kinetic equationis r_(20)=123.43 mg/(L·h) and the temperature coefficient isΘ=1.0022, at thetemperature of 20℃.
4 The SV and SVI are 20-40% and 80mL/g respectively at SBR reactor steadyoperation time.
5 The kinetic equation accord with the first order reaction. The kinetic model ofthe substance degradation is (?);
6 The running expense is 0.46 yuan/m~3 excluding equipment depreciation, and0.675 yuan/m~3 including equipment depreciation
引文
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[3]黄明祝,周琪,李咏梅.中水回用及展望[J].再生资源研究,2003,(5):19-21.
[4]邱俊,朱乐辉,闵根平,项忠平.SBR/过滤/ClO_2消毒工艺处理校园污水并回用[J].中国给水排水,2009,25(18):76-78.
[5]解晓强,沙琪,杨俊才.我国中水回用状况的分析与展望[J].安装,2003,(2):17-20..
[6]万兴,万金保.二段生化+物化法处理污水及中水回用的研究与设计[J].废水处理,2005,(4):1-4.
[7]房发俐..小区生活污水中水回用的研究[D].西北农林科技大学环境工程系,2007.6:2-5.
[8]褚俊英,陈吉宁,王志华等.中水回用的经济与中水利用的潜力分析[J].中国给水排水,2002,(5):83-86.
[9]颜春兰.小区中水回用及中水过滤消毒一体化设备的试验研究[D].重庆大学硕士学位论文,2005:4-8.
[10]朱兆亮.生活小区污水处理与中水回用试验研究[D].西安建筑科技大学硕士学位论文,2004:5-13.
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[12]叶雯,刘美南.我国城市污水再生利用的现状与对策[J].中国给水排水,2002,18(12):31-33.
[13]黎卫东.中水回用技术研究[J].广东化工,2005,(2):25-26.
[14]颜春兰.小区中水回用及中水过滤消毒一体化设备的试验研究[D].重庆大学硕士学位论文,2005:7-13.
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[16]Frank R., Asnieres. Method and Apparatus for Purifying Waste Water [P]. US: 15019268,1991.
[17]张忠波,陈吕军,胡纪萃.新型曝气生物滤池Biostyr[J].给水排水,2000,26(6):16-18.
[18]Pierre C, Mouchet, Joan-Yves B. Method, Device and use of Said Method for Biological Elimination of Metal Element s Present in an Ionized Statein Water[P], US: 16569336, 2003.
[19]吴建磊.污水处理新工艺-DENSADEG+BIOFOR[J].中国给水排水,2003,19(1):103-104.
[20]乔晓时,许云闳,全燮.BIOFOR曝气生物滤池用于城市污水处理[J].中国给水排水,2004,20(7):83-85.
[21]张忠祥,钱易.废水生物处理新技术[M].北京:清华大学出版社,2004.
[22]Rebecca M., Joanne Q., Tom S. The effects of media size on the performance of biological aerated filters[J]. Wat Res 2001, 35(10): 2514-2522.
[23]T.Mann A. Performance of floating and sunken media biological aerated filters under unsteady state conditions[J]. Water Research, 1999, 33(4): 1108-1113.
[24]Puznava N., Payraudeau M., Thornberg D. Simultaneous nitrification and denitrification in biofilters with real time aeration control[J]. Wat Sci & Tech, 2001, 43(1): 269-276.
[25]Pujol R., Lemmel H., Gousailles M. A keypoint of nitrification in an upflow biofiltration reactor[J]. Wat Sci & Tech, 1998, 38(3): 43-49.
[26]邱立平,马军.曝气生物滤池的短程硝化反硝化机理[J].中国给水排水,2002,18(11):1-4.
[27]马军,邱立平.曝气生物滤池的亚硝酸盐积累及其影响因子[J].环境科学,2003,24(1):84-90.
[28]Kerrn-Jespersen J. P., Henze M. Biological phosphorus uptake under anoxic and aerobic conditions[J]. Wat Res, 1993, 27: 617-624.
[29]Kerrn-Jespersen J. P., Henze M., Strube R. Biological phosphorus release and uptake under alternating anaerobic and anoxic conditions in a fixed-film reactor[J]. Wat Res, 1994, 28(5):1253-1255.
[30]严子春.折流曝气生物滤池处理城市污水的特性及其除磷脱氮效能研究[D].重庆:重庆大学,2004.
[31]李汝琪,钱易,孔波.曝气生物滤池处理啤酒废水的研究[J].环境科学,1999,20(4):83-85.
[32]李汝琪,孔波,钱易.曝气生物滤池处理生活污水试验[J].环境科学,1999,20(5):69-71.
[33]李汝琪,孙长虹,钱易.曝气生物滤池去除污染物的机理研究[J].环境科学,1999,20(6)49-52.
[34]田文华,文湘华,钱易.沸石滤料曝气生物滤池去除COD和氨氮[J].中国给水排水,2002,18(12):12-15.
[35]田文华,文湘华,钱易.沸石滤料曝气生物滤池启动性能研究[J].环境污染治理技术与设备,2002,3(12):38-42.
[36]桑军强,王占生.BAF在微污染源水生物预处理中的应用[J].中国给水排水,2003,19(2):21-23.
[37]王劲松,胡勇有.曝气生物滤池填料的研究进展[J].工业用水与废水,2002,33(05):7-9.
[38]Dillon G. R. A pilot-scale evaluation of the biocarbone process for the treatment of settled sewage and for teriary nitrification of secondary effluent[J]. Water science and technology,1990, 22(1-2): 305-316.
[39]Kent T. D., Fitzpatrick C. S. B., Williams S. C. Testing of biological aerated filter (BAF)media[J]. Water science and technology, 1996, 34(3-4): 363-370.
[40]郑俊,吴浩汀,程寒飞.曝气生物滤池污水处理工艺及其工程实例[M].北京:化学工业出版社,2002.
[41]纪轩.废水处理技术问答[M].北京:中国石化出版社出版社,2003.
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