污泥龄对SBR/OSA工艺中污泥减量效果的影响
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摘要
针对序批式活性污泥与厌氧反应器组合工艺(SBR/OSA工艺),分析了污泥龄(SRT)对污泥减量效果的影响。试验结果表明,在SRT分别为30、20和15 d条件下,SBR/OSA工艺连续运行9个月,在不影响出水水质的前提下,SRT=20 d时污泥减量率可以达到39%,污泥减量效果最佳。分析厌氧柱污泥上清液的多糖、蛋白质、挥发性脂肪酸(VFA)等指标发现,厌氧柱内发生的污泥衰减作用是污泥减量的主要原因。
Effect of sludge retention time( SRT) on sludge reduction efficiency was analyzed in a combined process of sequencing batch activated sludge reactor and anaerobic reactor( SBR/OSA process). SBR/OSA process was continuously operated for 9 months at SRT of 30 d,20 d and 15 d. Under the premise of not affecting the effluent quality of SBR/OSA process,the best sludge reduction efficiency was achieved when SRT was 20 d,and the sludge reduction rate could reach 39%. It was found that sludge decay in the anaerobic reactor was the main reason of sludge reduction through analyzing the polysaccharide,protein and volatile fatty acid( VFA) concentration in the mixed sludge supernatant of the anaerobic reactor.
Effect of sludge retention time( SRT) on sludge reduction efficiency was analyzed in a combined process of sequencing batch activated sludge reactor and anaerobic reactor( SBR/OSA process). SBR/OSA process was continuously operated for 9 months at SRT of 30 d,20 d and 15 d. Under the premise of not affecting the effluent quality of SBR/OSA process,the best sludge reduction efficiency was achieved when SRT was 20 d,and the sludge reduction rate could reach 39%. It was found that sludge decay in the anaerobic reactor was the main reason of sludge reduction through analyzing the polysaccharide,protein and volatile fatty acid( VFA) concentration in the mixed sludge supernatant of the anaerobic reactor.
引文
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[2] Semblante G U,Hai F I,Bustamante H,et al. Effects of iron salt addition on biosolids reduction by oxic-settling-anoxic(OSA)process[J]. Int Biodeterior Biodegrad,2015,104:391-400.
[3]唐悦恒,方闻,罗莹,等. SBR/OSA工艺的污泥减量化运行机理研究[J].中国给水排水,2011,27(5):104-108.Tang Yueheng,Fang Wen,Luo Ying,et al. Operation mechanism of SBR/OSA process for sludge reduction[J].China Water&Wastewater,2011,27(5):104-108(in Chinese).
[4]王建芳,赵庆良,刘志刚,等.好氧-沉淀-厌氧工艺剩余污泥减量化的影响因素[J].中国环境科学,2008,28(5):427-432.Wang Jianfang,Zhao Qingliang,Liu Zhigang,et al. Influence factors of excess sludge reduction of the oxic-settling-anaerobic technique[J]. China Environmental Science,2008,28(5):427-432(in Chinese).
[5] Demir,Filibeli A. The investigation of the sludge reduction efficiency and mechanisms in oxic-settling-anaerobic(OSA)process[J]. Water Sci Technol,2016,73(10):2311-2323.
[6] Pareja P M R,Jiménez A R,Aragón C A,et al. Changes in enzymatic and microbiological activity during adaptation of a conventional activated sludge(CAS)to a CASoxic-settling-anaerobic(OSA)adapted process[J]. Desalination and Water Treatment,2015,57(6):2719-2725.
[7]李彬彬.污泥减量的序批式活性污泥法工艺研究[D].扬州:扬州大学,2016.Li Binbin. The Study on a Sequencing Batch Reactor Activated Sludge Process for Sludge Reduction[D]. Yangzhou:Yangzhou University,2016(in Chinese).