超声联合热碱破解高含固污泥的理化性质变化  

Characteristics of High Solid Sludge During Simultaneous Pretreatment With Ultrasonic and Thermo-Chemical

作　　者：徐慧敏 秦卫华[1] 李中林[1] 顾琪 戴晓虎[2,3] XU Hui-min;QIN Wei-hua;LI Zhong-lin;GU Qi;DAI Xiao-hu(Nanjing Institute of Environmental Sciences,Ministry of Environmental Protection, Nanjing 210042, China;National Engineering Research Center for Urban Pollution Control, Tongji University, Shanghai 200092, China;College of Environmental Science and Engineering, TongjiUniversity, Shanghai 200092, China)

机构地区：[1]环境保护部南京环境科学研究所,江苏南京210042 [2]同济大学城市污染控制国家工程研究中心,上海200092 [3]同济大学环境科学与工程学院,上海200092

出　　处：《生态与农村环境学报》2018年第5期469-473,共5页Journal of Ecology and Rural Environment

基　　金：国家高技术研究发展计划(2012AA063502)

摘　　要：为了进一步提高能量利用效率,在前期研究的基础上,采用超声和热碱同步处理方法,在超声能量[以总固体(TS)计]9 551 kJ·kg^(-1)、温度73℃和加碱量(以TS计)0.085 g·g^(-1)处理条件下,研究不同含固率污泥预处理后有机质释放情况及规律。结果表明,含固率w为3%、5%、10%和15%的污泥经预处理后平均粒径分别降低40.14%、58.01%、93.63%和17.46%;含固率10%的污泥预处理后粒径分布中累计体积占10%、50%和90%所对应的粒径值(dp10、dp50和dp90)分别较未处理污泥降低88.38%、93.85%和96.74%。在有机物浓度变化方面,破解后污泥溶解性化学需氧量(SCOD)增量随含固率的增加而上升,而污泥破解度变化趋势则相反,含固率3%的污泥破解度最高达50.3%。在有机物组分方面,含固率10%的污泥预处理后溶解性蛋白质和多糖浓度增量最高,且可降解有机质占溶解性有机质比例最高,达88.94%。以上结论表明,在破解高浓度污泥方面,超声联合热碱处理工艺亦有较好的应用前景。The effects of simultaneous pretreatment with ultrasonic and thermo-chemical on high solid sludge disintegration for improved energy efficiency were investigated. The sludge was pretreated at specific energy of 9551 kJ·kg^-1 total solids（TS）,temperature of 73 ℃,and alkaline dosage of 0. 085 g·g^-1,which were optimal conditions obtaining maximum sludge disintegration in previous study. Experimental results show that the mean particle diameters（dp） of pretreated sludge with solid contents of 3%,5%,10%,and 15% were decreased by 40. 14%,58. 01%,93. 63%,and 17. 46%.Besides,the dp10,dp50,and dp90 of pretreated sludge with solid content of 10% decreased by 88. 38%,93. 85%,and 96. 74% after pretreatment. In terms of sludge disintegration,the increased soluble chemical oxygen demand（SCOD） concentration of pretreated sludge had a positive correlation with solid content of sludge,while the disintegration degree（DD）showed a reverse trend. The maximum DD of 50. 3% was obtained in sludge with solid content of 3%. The organic matter composition of pretreated sludge was also examined. It indicated that soluble protein and carbohydrates concentrations of sludge with 10% solid content were much higher than those of sludge with 3%,5%,and 15% solid content. Moreover,the biodegradability of pretreated sludge with 10% solid content was as high as 88. 94%. Therefore,the simultaneous pretreatment with ultrasonic and thermo-chemical has a good application prospects in high solid sludge disintegration.

关 键 词：高含固率污泥 超声联合热碱 粒径 破解度 

分 类 号：X703.1[环境科学与工程—环境工程]