超声波-缺氧/好氧消化与传统好氧消化效果的比较研究
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摘要
为考察超声波-缺氧/好氧消化对污泥降解的效果,通过实验室中试对比试验,研究了污泥超声波-缺氧/好氧消化对传统好氧消化的比较优势。研究结果表明,经过25 d的消化后,超声波-缺氧/好氧消化污泥TSS和VSS的去除率分别达到了35.77%和50.02%,比好氧消化污泥分别提高了3.90%和8.99%;超声波-缺氧/好氧消化污泥稳定时间比好氧消化污泥缩短了近6 d;超声波-缺氧/好氧消化污泥的TN去除率为40.8%,远高于传统好氧消化,并且超声波-缺氧/好氧消化污泥上清液中氨氮和硝态氮浓度却远低于传统好氧消化,因而降低了上清液回流氨氮和硝态氮对污水处理系统的负荷压力。
In order to explore the efficiency of ultrasonic-aerobic/anoxic digestion for sludge biodegradation, the contrastive pilot scale experiments of ultrasonic-aerobic/anoxic digestion and conventional aerobic digestion were conducted. The results showed that, TSS and VSS removal efficiency of ultrasonic-aerobic/anoxic digestion achieved to 35.77 % and 50.02 %, which were increased by 3.90 % and 8.99 %, respectively, after digestion time of 25 d. The digestion time for ultrasonic-aerobic/anoxic digestion was shortened by 6 d compared to conventional aerobic digestion; TN removal efficiency of ultrasonic-aerobic/anoxic digestion was 40.8 %, which was much higher than that of aerobic digestion. Furthermore, ammonia and nitrate concentrations in sludge supernatant of ultrasonic-aerobic/anoxic digestion were lower than that of aerobic digestion, so that the pressure of circumfluence to wastewater treatment plant was reduced.
In order to explore the efficiency of ultrasonic-aerobic/anoxic digestion for sludge biodegradation, the contrastive pilot scale experiments of ultrasonic-aerobic/anoxic digestion and conventional aerobic digestion were conducted. The results showed that, TSS and VSS removal efficiency of ultrasonic-aerobic/anoxic digestion achieved to 35.77 % and 50.02 %, which were increased by 3.90 % and 8.99 %, respectively, after digestion time of 25 d. The digestion time for ultrasonic-aerobic/anoxic digestion was shortened by 6 d compared to conventional aerobic digestion; TN removal efficiency of ultrasonic-aerobic/anoxic digestion was 40.8 %, which was much higher than that of aerobic digestion. Furthermore, ammonia and nitrate concentrations in sludge supernatant of ultrasonic-aerobic/anoxic digestion were lower than that of aerobic digestion, so that the pressure of circumfluence to wastewater treatment plant was reduced.
引文
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[10]郑莉,孙水裕,许燕滨,等.正交实验优化超声波预处理污泥的工况研究[J].环境工程学报,2010,11(4):2613-2618.
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[13]Neis U,Nickel K,Lunde A.Improving anaerobic and aerobic degradation by ultrasonic disintegration of biomass.Journal of Environmental Science and Health,2008,43:1541-1545.
[14]陈岩,韩洪军.污泥好氧厌氧交替消化的实验研究[J].哈尔滨商业大学学报(自然科学版),2007,23(4):405-414.
[15]Chen Y,Han H J.Experimental research on aerobic-anoxic sludge digestion.Journal of Harbin University of Commerce(Natural science edition),2007,23(4):405-414.
[16]张艳萍,彭永臻.好氧/缺氧消化降解污泥特征分析[J].环境工程学报,2009,3(4):673-676.
[2]张锡辉,刘勇弟.废水生物处理(第2版)[M].北京:化学工业出版社,2003.
[3]Daigger G T,Bailey E.Imporving aerobic digestion prethickening,and aerobic-anoxic operation:Four full-scale demonstrations[J].Water Enviornmental Research,2000,72(3):260-270.
[4]姚炜婷,孙水裕,郑莉,等.超声波-缺氧/好氧消化过程污泥胞外聚合物和溶出物的变化研究.环境科学,2011,31(9):1925-1932.
[5]Yu G H,He P J,Shao L M,et al.Extracellular proteins,polysaccharides and enzymes impact on sludge aerobic digestion after ultrasonic pretreatment[J].Water Research,2008,42(8-9):1925-1934.
[6]Kim D J,Lee J.Ultrasonic sludge disintegration for enhanced methane production in anaerobic digestion:effects of sludge hydrolysis efficiency and hydraulic retention time[J].Bioprocess and Biosystems Engineering,2012,35(1-2):289-96.
[7]叶运弟,孙水裕,郑莉,等.超声波促进好氧/缺氧污泥消化过程中水解酶活性变化研究.2012,33(8):248-253.
[8]Neis U.Ultrasound in water,wastewater and sludge treatment[J].Water 21,2000,11(6):36-39.
[9]曹秀芹,陈珺,唐臣,等.超声处理后剩余污泥性质变化及分析[J].环境工程,2005,23(5):84-86.
[10]郑莉,孙水裕,许燕滨,等.正交实验优化超声波预处理污泥的工况研究[J].环境工程学报,2010,11(4):2613-2618.
[11]国家环境保护总局.水和废水监测分析方法(第4版).北京:中国环境科学出版社,2002.
[12]GB18918-2002,城镇污水处理厂污染物排放标准.
[13]Neis U,Nickel K,Lunde A.Improving anaerobic and aerobic degradation by ultrasonic disintegration of biomass.Journal of Environmental Science and Health,2008,43:1541-1545.
[14]陈岩,韩洪军.污泥好氧厌氧交替消化的实验研究[J].哈尔滨商业大学学报(自然科学版),2007,23(4):405-414.
[15]Chen Y,Han H J.Experimental research on aerobic-anoxic sludge digestion.Journal of Harbin University of Commerce(Natural science edition),2007,23(4):405-414.
[16]张艳萍,彭永臻.好氧/缺氧消化降解污泥特征分析[J].环境工程学报,2009,3(4):673-676.