超声联合热碱破解高含固污泥的理化性质变化

doi:10.11934/j.issn.1673-4831.2018.05.012

生态与农村环境学报 ›› 2018, Vol. 34 ›› Issue (5): 469-473.doi: 10.11934/j.issn.1673-4831.2018.05.012

超声联合热碱破解高含固污泥的理化性质变化

徐慧敏¹, 秦卫华¹, 李中林¹, 顾琪¹, 戴晓虎^2,3

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

收稿日期:2017-07-21 出版日期:2018-05-25 发布日期:2018-05-25
通讯作者: 秦卫华 E-mail:qinweihua2002@sina.com
作者简介:徐慧敏(1989-),女,江苏泰州人,助理研究员,博士,主要从事污泥资源化利用方面的研究。E-mail:huimin0905@163.com
基金资助:
国家高技术研究发展计划（2012AA063502）

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

XU Hui-min¹, QIN Wei-hua¹, LI Zhong-lin¹, GU Qi¹, DAI Xiao-hu^2,3

1. Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China;
2. National Engineering Research Center for Urban Pollution Control, Tongji University, Shanghai 200092, China;
3. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

Received:2017-07-21 Online:2018-05-25 Published:2018-05-25

摘要/Abstract

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。

关键词: 高含固率污泥, 超声联合热碱, 粒径, 破解度

Abstract:

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.

Key words: high solid sludge, combined ultrasonic and thermo-chemical, particle diameter, disintegration degree

中图分类号:

X703.1

徐慧敏, 秦卫华, 李中林, 顾琪, 戴晓虎. 超声联合热碱破解高含固污泥的理化性质变化[J]. 生态与农村环境学报, 2018, 34(5): 469-473.

XU Hui-min, QIN Wei-hua, LI Zhong-lin, GU Qi, DAI Xiao-hu. Characteristics of High Solid Sludge During Simultaneous Pretreatment With Ultrasonic and Thermo-Chemical[J]. Journal of Ecology and Rural Environment, 2018, 34(5): 469-473.

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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

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