热水解条件对剩余污泥物理特性的影响  

Effect of Different Thermal Hydrolysis Conditions on Physical Properties of Excess Sludge

作　　者：肖雄 李伟[2] 袁彧 杨鹏 邹德勋[1] 刘研萍[1] XIAO Xiong;LI Wei;YUAN Yu;YANG Peng;ZOU De-xun;LIU Yan-ping(Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029,China;Research and Development Center of Beijing Drainage Group Co Ltd, Beijing Wastewater Recycling Engineering Technology Research Center, Beijing 100024,China;China aviation planning and design instituete (group) Co Ltd, Beijing 100120,China)

机构地区：[1]北京化工大学环境科学与工程系,北京100029 [2]北京城市排水集团有限责任公司科技研发中心,北京市污水资源化工程技术研究中心,北京100124 [3]中国航空工规划设计研究总院有限公司,北京100120

出　　处：《中国沼气》2020年第4期27-33,共7页China Biogas

基　　金：北京市科技计划(Z181100002418017);国家水体污染控制与治理科技重大专项(2017ZX07403002-05)。

摘　　要：热水解是剩余污泥厌氧消化的预处理技术之一,文章研究了不同热水解条件对污泥物理特性的影响。研究结果表明,在120℃~210℃/30 min^75 min条件下,热水解污泥的VSS水解率随着热水解温度升高和热水解时间的延长而呈增加趋势。毛细吸水时间从原始污泥的4816.3 s,下降至210℃处理后的59.1 s,有效提高了污泥的脱水性能;污泥粒径随着热水解温度的升高而减少,相比原始污泥,各温度组热水解后,Dx10降低了33.91%~80.94%,Dx50降低了42.56%~74.88%,Dx90也因热水解的作用而下降。污泥热水解适宜的温度为165℃~180℃,Dx10,Dx50和Dx90分别为4.365μm,15.156μm,60.256μm。Thermal hydrolysis is one of the pretreatment technologies for anaerobic digestion of excess sludge.The effects of different thermal hydrolysis conditions on the physical properties of sludge were studied in this paper.The results showed that,under the condition of 120℃~210℃/30 min^75 min,the VSS decomposition rate of sludge increased with the increase of thermal hydrolysis temperature and time.The capillary water suction time decreased from 4816.3 s of the original sludge to 59.1 s after thermal hydrolysis treatment at 210℃.The dewaterability of the sludge was improved effectively by the thermal hydrolysis.The particle size of sludge decreased with the increase of thermal hydrolysis temperature.Compared with untreated sludge,Dx10 of treated sludge decreased by 33.91%~80.94%,Dx50 decreased by 42.56%~74.88%,Dx90 also decreased due to thermal hydrolysis.The suitable temperature for the thermal hydrolysis of sludge was 165℃~180℃,Dx10,Dx50 and Dx90 were 4.365μm,15.156μm,,60.256μm,respectively.

关 键 词：剩余污泥 热水解 毛细吸水时间 污泥粒径分布 

分 类 号：S216.4[农业科学—农业机械化工程] X703[农业科学—农业工程]