滨海河网地区城镇污水处理厂污泥产率影响因素研究

Research on the Influencing Factors of Sludge Yield in Urban Sewage Treatment Plants in Coastal River Network Areas

本文以广州市滨海河网地区4座典型城镇污水处理厂为研究范围,分析了进水COD、BOD、SS浓度以及气温等对污泥产率的影响。研究结果表明:(1)滨海河网地区城镇污水处理厂的污泥产率相对较低,不同污水处理工艺的污泥产率季节变化规律不同,CASS工艺夏季污泥产率较高,AAO工艺秋季污泥产率较高;(2)污泥产率与进水水质密切相关,对于进水浓度较低的污水厂,污泥产率与COD、BOD、SS浓度呈现弱的负相关关系,反之,呈现正相关关系,且浓度越高,相关性越强;(3)滨海河网地区四季温差不大,气温对污水厂的污泥产率影响较小。(4)通过控制进水水量水质,优化运行参数优化等措施尽可能保障活性污泥处理系统安全稳定高效运行,实现污泥减量化。

This article takes four typical urban sewage treatment plants in the coastal river network area of Guangzhou as the research scope,and analyzes the effects of influent COD,BOD,SS concentration,and temperature on sludge yield.The research results indicate that:(1)the sludge yield of urban sewage treatment plants in coastal river network areas is relatively low,and the seasonal variation pattern of sludge yield is different for different sewage treatment processes.The CASS process has a higher sludge yield in summer,while the AAO process has a higher sludge yield in autumn;(2)The sludge yield is closely related to the influent water quality.For sewage plants with lower influent concentrations,the sludge yield shows a weak negative correlation with COD,BOD,and SS concentrations.On the contrary,it shows a positive correlation,and the higher the concentration,the stronger the correlation;(3)The temperature difference in the coastal river network area is not significant throughout the four seasons,and the impact of temperature on the sludge yield of sewage plants is relatively small.(4)By controlling the inflow water quantity and quality,optimizing operating parameters,and other measures,we aim to ensure the safe,stable,and efficient operation of the activated sludge treatment system,achieving sludge reduction.