温度对剩余活性污泥性能的影响研究
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摘要
随着我国污水处理产业的发展,污泥产量也急剧增加,给现有污泥处理处置技术带来较大的资本挑战。为帮助现有污泥处理工艺更好地实现精细化管理,以剩余活性污泥为研究对象,从污泥中有机物含量、蛋白质含量、多糖含量、脂肪含量和细菌丰度等测试指标开展分析,并研究剩余活性污泥的周期性特点。试验结果表明,高温有利于细菌丰度的增加与有机物含量的降低,且糖类、蛋白质和脂肪含量随着温度的升高呈现显著下降的趋势。建议生活污水处理厂在低温天气期间增强对活性污泥存储介质的保温工作,以利于污泥原位稳定化和减量化。
With the development of sewage treatment industry in China,the increased sewage sludge production has posed a huge challenge to the limited investment in the sewage sludge treatment and disposal. Therefore,in order to achieve a high quality management of sewage sludge treatment,this paper studied the periodical performance of excess sludge and the major indicators including the organic mass percentage,the contents of protein,polysaccharide,and lipid,and the bacteria abundance in activated sludge. The finding showed that high temperature was benefit to the growth of bacteria and the degradation of the organic matter; in addition,protein,polysaccharide,and lipid was degraded more significantly when the temperature was higher. Ultimately,it is recommended that wastewater treatment plants should focus on the heat insulation work of containers of the excess sludge to achieve the reduction and stabilization of excess sludge in situ,when the temperature is low.
With the development of sewage treatment industry in China,the increased sewage sludge production has posed a huge challenge to the limited investment in the sewage sludge treatment and disposal. Therefore,in order to achieve a high quality management of sewage sludge treatment,this paper studied the periodical performance of excess sludge and the major indicators including the organic mass percentage,the contents of protein,polysaccharide,and lipid,and the bacteria abundance in activated sludge. The finding showed that high temperature was benefit to the growth of bacteria and the degradation of the organic matter; in addition,protein,polysaccharide,and lipid was degraded more significantly when the temperature was higher. Ultimately,it is recommended that wastewater treatment plants should focus on the heat insulation work of containers of the excess sludge to achieve the reduction and stabilization of excess sludge in situ,when the temperature is low.
引文
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[2]谢小青,陈向强,刘美龄,等.免翻堆快速生物干化技术在污泥处理中的应用[J].中国给水排水,2014,30(9):142-146.
[3]Guo W Q,Yang S S,Xiang W S,et al.Minimization of excess sludge production by in-situ activated sludge treatment processes—A comprehensive review[J].Biotechnol Adv,2013,31(8):1386-1396.
[4]国家环境保护总局.水和废水监测分析方法(第4版)[M].北京:中国环境科学出版社,2002.
[5]van den Akker B,Beard H,Kaeding U,et al.Exploring the relationship between viscous bulking and ammonia-oxidiser abundance in activated sludge:A comparison of conventional and IFAS systems[J].Water Res,2010,44(9):2919-2929.
[6]CJ/T 221—2005,城市污水处理厂污泥检验方法[S].北京:中国标准出版社,2006.
[7]Ma X J,Xing M Y,Wang Y,et al.Microbial enzyme and biomass responses:Deciphering the effects of earthworms and seasonal variation on treating excess sludge[J].J Environ Manage,2016,170:207-214.