餐厨垃圾湿法厌氧处理的污泥流变性特征及其成因  

Rheological Characteristics of Sludge from Wet Anaerobic Digestion of Kitchen Waste and Its Causes

作　　者：梁玉帅 王侃宏 徐宇峰 刘吉宝[1,3,4] 郁达伟 祝金星[5] 陈梅雪 魏源送 李娇[5] 樊华 LIANG Yu‑shuai;WANG Kan‑hong;XU Yu‑feng;LIU Ji‑bao;YU Da‑wei;ZHU Jin‑xing;CHEN Mei‑xue;WEI Yuan‑song;LI Jiao;FAN Hua(State Key Joint Laboratory of Environmental Simulation and Pollution Control,Research Center for Eco‑Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;School of Energy and Environmental Engineering,Hebei University of Engineering,Handan 056000,China;Laboratory of Water Pollution Control,Research Center for Eco‑Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China;Beijing Environmental Research and Development Co.Ltd.,Beijing 100101,China)

机构地区：[1]中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室,北京100085 [2]河北工程大学能源与环境工程学院,河北邯郸056000 [3]中国科学院生态环境研究中心水污染控制实验室,北京100085 [4]中国科学院大学,北京100049 [5]北京环卫集团环境研究发展有限公司,北京100101

出　　处：《中国给水排水》2023年第13期117-125,共9页China Water & Wastewater

基　　金：国家重点研发计划项目(2018YFD1100600)。

摘　　要：餐厨垃圾厌氧处理的污泥流变性是影响厌氧处理反应器混合能耗的重要因素,但是污泥浓度影响流变性的机制尚不明确。为此,采集北京市某餐厨垃圾综合处理厂的湿法厌氧处理污泥,考察了污泥粒径分布、溶解态有机物组分和温度等因素对污泥流变性的影响。结果表明,升温对污泥上清液和TS含量为2%~6%的污泥流变性起到了促进作用,升温可使颗粒物水解成小分子有机物,从而导致流变性增强。当TS≤2%时,污泥的流变性主要由溶解态有机物贡献,芳香类蛋白质Ⅱ转化为芳香类蛋白质Ⅰ导致屈服应力τ_(0)降低;当TS≥4%时,污泥流变性主要由颗粒物贡献,屈服应力τ_(0)提高而稠度指数k降低,粒径分布较稳定;当温度>80℃时,蛋白质变性导致屈服应力τ_(0)明显升高,但稠度指数k明显降低。The rheology of anaerobic digested sludge is an important factor affecting the mixed energy consumption of anaerobic digester for kitchen waste.However,mechanism of the effect of sludge concentration on rheology is still unclear.In this paper,the sludge from wet anaerobic digestion was collected from a comprehensive kitchen waste treatment plant in Beijing,and the effects of sludge particle size distribution,dissolved organic compounds and temperature on sludge rheology were investigated.Temperature rise promoted the rheology of sludge supernatant and sludge with TS content of 2%-6%,and hydrolyzed particulate matter into small molecular organic matter,resulting in increased rheology.When TS was no more than 2%,the rheology of sludge was mainly contributed by dissolved organic compounds,and the yield stressτ_(0)was reduced by the conversion of aromatic proteinⅡto aromatic proteinⅠ.When TS was greater than 4%,the rheology of sludge was mainly contributed by particulate matter,the yield stressτ_(0)increased,the viscosity index k decreased,and the particle size distribution was relatively stable.When the temperature was greater than 80℃,the yield stressτ_(0)increased obviously due to protein denaturation,but the viscosity index k decreased obviously.

关 键 词：餐厨垃圾 湿法厌氧处理 污泥流变性 

分 类 号：TU992[建筑科学—市政工程]