垃圾渗滤液深度处理的混凝-UV-O_3组合工艺试验
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摘要
老龄的垃圾渗滤液经过生化处理之后仍然不能达标排放,需要进行深度处理。本文采用混凝/UV/O_3组合工艺对经氧化塘出水的垃圾渗滤液进行了深度处理的试验研究,探索了较优的组合处理工艺条件。结果表明:在混凝反应阶段,当pH值为5、PFS投加量为1 200 mL(100 g/1 000 mL)、PAM投加量为1 000 mL(1 g/1 000 mL),COD去除率可达60.2%;在光化学反应阶段,当反应时间为60 min、pH值为9、紫外光照强度为3.8 W·L~(-1)、臭氧通气量为80 L·h~(-1),COD去除率可达79.1%。该组合工艺对水样的COD综合去除率为91.7%,最终出水COD值由1 560 mg·L~(-1)降低至130 mg·L~(-1),出水可接近GB16889-2008排放标准。同时,研究结果还表明了混凝与光化学处理工艺组合应用的必要性,与单纯的UV/O_3光化学处理工艺相比,混凝/UV/O_3组合处理工艺对垃圾渗滤液COD的去除率提升了23.5%。
The aged landfill leachate is still unable to reach the standard after biochemical treatment and needs to be treated in depth.In this paper,the coagulation/UV/O_3 combination process was used to investigate the advanced treatment of landfill leachate treated by oxidation pond.The results showed that the optimal reaction conditions were:the condition of the coagulation reaction stage was pH=5,the dosage of PFS was 1200 mL(100 g/1 000 mL),and the dosage of PAM was 1 000 mL(1 g/1 000 mL),and COD removal rate is 60.2%;The photochemical reaction stage conditions are 60 min,pH=9,ultraviolet light intensity is 3.8 W·L~(-1),and ozone ventilation is 80 L·h~(-1),and COD removal rate is 79.1%.Overall,the combined process has COD removal rate of 91.7% for wastewater.The final effluent COD value was reduced to 130 mg·L~(-1).At the same time,the study emphasizes the importance of the combined application of coagulation and photochemical reaction units.The COD removal rate of the coagulation/UV/O_3 combination process is 23.5% higher than that of the coagulation/UV/O_3 process.
The aged landfill leachate is still unable to reach the standard after biochemical treatment and needs to be treated in depth.In this paper,the coagulation/UV/O_3 combination process was used to investigate the advanced treatment of landfill leachate treated by oxidation pond.The results showed that the optimal reaction conditions were:the condition of the coagulation reaction stage was pH=5,the dosage of PFS was 1200 mL(100 g/1 000 mL),and the dosage of PAM was 1 000 mL(1 g/1 000 mL),and COD removal rate is 60.2%;The photochemical reaction stage conditions are 60 min,pH=9,ultraviolet light intensity is 3.8 W·L~(-1),and ozone ventilation is 80 L·h~(-1),and COD removal rate is 79.1%.Overall,the combined process has COD removal rate of 91.7% for wastewater.The final effluent COD value was reduced to 130 mg·L~(-1).At the same time,the study emphasizes the importance of the combined application of coagulation and photochemical reaction units.The COD removal rate of the coagulation/UV/O_3 combination process is 23.5% higher than that of the coagulation/UV/O_3 process.
引文
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[9] 胡兆吉,孙洋,陈建新.UV/O_3高级氧化工艺深度处理垃圾渗滤液的研究[J].工业水处理,2017,37(11):42-45.
[10] MONJE RAMIREZ I,M T.ORTA DE VELASQUEZ.Removal and transformation of recalcitrant organic matter from stabilized saline landfill leachates by coagulation-ozonation coupling processes[J].Water Research,2004,38(9):0-2367.
[11] 贾玉红,杨慧茹,张灿,等.物化法对垃圾渗滤液COD的去除研究[J].给水排水,2015,41(S1):205-209
[12] 李亚峰,吕春华,陈萍,等.混凝和化学沉淀法联合处理垃圾渗滤液[J].沈阳建筑大学学报(自然科学版),2007,23(2):280-283
[13] FAN H J,SHU H Y,YANG H S,et al.Characteristics of landfill leachates in central Taiwan [J].Science of the Total Environment,2006,361(1-3):25-37.
[14] FONTANIER V,FARINES V,ALBET J,et al.Study of catalyzed ozonation for advanced treatment of pulp and paper mill effluents[J].Water Research,2006,40(2):0-310.
[15] KREETACHAT T,DAMRONGSRI M,PUNSUWON V,et al.Effects of ozonation process on lignin-derived compounds in pulp and paper mill effluents[J].Journal of Hazardous Materials,2007,142(1-2):250-257.
[2] 张源野.垃圾渗滤液处理技术研究进展[J].中国资源综合利用,2014,32(11):29-37.
[3] 汪晓军,陈思莉,顾晓扬,等.混凝-Fenton-BAF深度处理垃圾渗滤液中试研究[J].环境工程学报,2007,1(10):42-45.
[4] 宋亚朋,王建兵,聂海峰,等.管式O3/UV-BAF处理印染生化尾水的中试实验[J].环境工程学报,2019,13(2):264-271.
[5] 廖路花.高级氧化技术在给水与废水处理中的应用[J].化学工程与装备,2018(8):279-281+259.
[6] 邵云海,邓佳,黄思远,等.臭氧催化氧化-BAC处理垃圾渗滤液实验研究[J].环境工程,2016,34(S1):1-3+74.
[7] 张光明,张盼月,张信芳.水处理高级氧化技术[M].哈尔滨工业大学出版社,2007.
[8] 张龙,薛佩姣,杨慧中.基于臭氧紫外协同在线检测水体COD的研究[J].环境工程学报,2015,9(1):235-239.
[9] 胡兆吉,孙洋,陈建新.UV/O_3高级氧化工艺深度处理垃圾渗滤液的研究[J].工业水处理,2017,37(11):42-45.
[10] MONJE RAMIREZ I,M T.ORTA DE VELASQUEZ.Removal and transformation of recalcitrant organic matter from stabilized saline landfill leachates by coagulation-ozonation coupling processes[J].Water Research,2004,38(9):0-2367.
[11] 贾玉红,杨慧茹,张灿,等.物化法对垃圾渗滤液COD的去除研究[J].给水排水,2015,41(S1):205-209
[12] 李亚峰,吕春华,陈萍,等.混凝和化学沉淀法联合处理垃圾渗滤液[J].沈阳建筑大学学报(自然科学版),2007,23(2):280-283
[13] FAN H J,SHU H Y,YANG H S,et al.Characteristics of landfill leachates in central Taiwan [J].Science of the Total Environment,2006,361(1-3):25-37.
[14] FONTANIER V,FARINES V,ALBET J,et al.Study of catalyzed ozonation for advanced treatment of pulp and paper mill effluents[J].Water Research,2006,40(2):0-310.
[15] KREETACHAT T,DAMRONGSRI M,PUNSUWON V,et al.Effects of ozonation process on lignin-derived compounds in pulp and paper mill effluents[J].Journal of Hazardous Materials,2007,142(1-2):250-257.
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