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| Optimizing parameters of sludge disruption by combined low temperature thermal and ultrasonic pretreatment through response surface methodology |
| XU Hui-min1, HE Guo-fu1, DAI Ling-ling2,3, ZHANG Xiao-na1, WANG Zhong-yu1, DAI Xiao-hu2,3, XIANG Wei-ning1,4 |
1. College of Ecological and Environmental Science, East China Normal University, Shanghai 200241, China;
2. National Engineering Research Center for Urban Pollution Control, Shanghai 200092, China;
3. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;
4. Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, Shanghai 200241, China |
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Abstract The scientific gap of operating parameters of combined thermal and ultrasonic disintegration at low temperature of waste activated sludge(WAS) still needs to be filled. This study provides more insights into the technical feasibility of low organic WAS disruption pretreated by combined thermal at temperature lower than 100℃ and ultrasonic technique. Optimization of combined thermal and ultrasonic disintegration of WAS for enhanced organic releasing was carried out using response surface methodology(RSM) and Box-Behnken design of experiment. The quadratic effects as well as the interactive effects of temperature and specific energy on the disintegration degree of SCOD, soluble concentration of protein and carbohydrate were investigated. Results indicated that quadratic effect of temperature was more significant in affecting sludge disintegration than specific energy and regression models had good fitness with experimental results. The optimum disintegration degree of SCOD, soluble concentration of protein and carbohydrate achieved were 39.01%, 1360.59mg/L and 334.52mg/L, respectively, at 80℃ and 12000kJ/kg TS. In addition, the verification experiments appeared high coincide degree with predicted results, indicating that the models were reliable for application and promotion of combined thermal and ultrasonic disintegration.
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Received: 26 August 2015
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| [1] |
尹福斌,李子富,王冬泠,等.加碱预处理对致病微生物去除效果及动力学研究[J]. 中国环境科学, 2015,35(1):196-203.
|
| [2] |
Kim D, Youn Y. Characteristics of sludge hydrolysis by ultrasound and thermal pretreatment at low temperature[J]. Korean Journal of Chemical Engineering, 2011,28(9):1876-1881.
|
| [3] |
Cho S, Park S, Seon J, et al. Evaluation of thermal, ultrasonic and alkali pretreatments on mixed-microalgal biomass to enhance anaerobic methane production[J]. Bioresource Technology, 2013, 143(0):330-336.
|
| [4] |
宫常修,蒋建国,杨世辉.超声波耦合Fenton氧化对污泥破解效果的研究——以粒径和溶解性物质为例[J]. 中国环境科学, 2013,33(2):293-297.
|
| [5] |
邬艳,杨艳玲,李星,等.超声对净水沉淀污泥絮体特性及对污泥回流效能的影响[J]. 中国环境科学, 2014,34(5):1166-1172.
|
| [6] |
?ahinkaya S, Sevimli M F. Sono-thermal pre-treatment of waste activated sludge before anaerobic digestion[J]. Ultrasonics Sonochemistry, 2013,20(1):587-594.
|
| [7] |
刘阳,彭永臻,韩玉伟,等.游离氨对热水解联合中温厌氧消化处理剩余污泥的影响[J]. 中国环境科学, 2015,35(9):2650-2657.
|
| [8] |
王治军,王伟.热水解预处理改善污泥的厌氧消化性能[J]. 环境科学, 2005,26(1):68-71.
|
| [9] |
Ferrer I, Ponsá S, Vázquez F, et al. Increasing biogas production by thermal(70℃) sludge pre-treatment prior to thermophilic anaerobic digestion[J]. Biochemical Engineering Journal, 2008, 42(2):186-192.
|
| [10] |
Appels L, Degrève J, Van der Bruggen B, et al. Influence of low temperature thermal pre-treatment on sludge solubilisation, heavy metal release and anaerobic digestion[J]. Bioresource Technology, 2010,101(15):5743-5748.
|
| [11] |
Trzcinski A P, Tian X, Wang C, et al. Combined ultrasonication and thermal pre-treatment of sewage sludge for increasing methane production[J]. Journal of Environmental Science and Health, Part A, 2015,50(2):213-223.
|
| [12] |
廖足良,冉小珊,刘长青,等.热水解和超声波预处理对污泥厌氧消化效能的影响研究[J]. 环境工程, 2014,32(6):52-56.
|
| [13] |
张峰,冉晓珊,包苏俊,等.热水解超声组合预处理对污泥厌氧消化产气潜力的影响研究[J]. 环境污染与防治, 2013,35(9):71-74.
|
| [14] |
邢奕,王志强,洪晨,等.芬顿试剂与DDBAC联合调理污泥的工艺优化[J]. 中国环境科学, 2015,35(4):1164-1172.
|
| [15] |
邢奕,王志强,洪晨,等.基于RSM模型对污泥联合调理的参数优化[J]. 中国环境科学, 2014,34(11):2866-2873.
|
| [16] |
葛杰,宋永会,钱锋,等.白云石石灰结晶流化床污水除磷工艺优化[J]. 环境工程学报, 2015,9(2):586-594.
|
| [17] |
Shehu M S, Abdul Manan Z, Wan Alwi S R. Optimization of thermo-alkaline disintegration of sewage sludge for enhanced biogas yield[J]. Bioresource Technology, 2012,114(0):69-74.
|
| [18] |
Dhar B R, Nakhla G, Ray M B. Techno-economic evaluation of ultrasound and thermal pretreatments for enhanced anaerobic digestion of municipal waste activated sludge[J]. Waste Management, 2012,32(3):542-549.
|
|
|
|
