1.苏州市职业大学环境与分析实验室，苏州 215104
基金项目: 苏州市科技局（产业前瞻性应用研究（工业）指导性计划）
苏州市职业大学“青蓝工程”项目
苏州市职业大学课题（SVU2015YY02）
Dehydration and reduction treatment effects of sweep-frequency ultrasound on municipal sludge treatment
YU Sheng1,1.Laboratory of Environment and Analysis, Suzhou Vocational University, Suzhou 215104, China
-->
摘要
HTML全文
图
参考文献
相关文章
施引文献
资源附件
访问统计
摘要:以苏南某10万t·d-1市政污水厂污泥浓缩池剩余污泥为研究对象，利用非直接接触管槽式超声反应器，在20~100 kHz扫频（周期2 s）超声条件下分析超声输入功率和超声时间对污泥脱水和减量化效果的影响。结果表明，在20~100 kHz扫频超声污泥处理工艺过程中，从处理成本和处理效率考虑，优化后的超声输入功率为0.3 W·mL-1、超声作用时间为0.5 min。与原工艺相比，泥饼折算体积Ω（含固率20%）、混合液含固率ρ、混凝剂用量以及每天污泥处理成本分别减少了(43.8±1.2)%、(50.0±1.6)%、(38.9±1.7)%和(41.9±2.2)%。此外，核算改造后污泥处理经济效益，设备投资回收时间为17个月。可见，引入新技术工艺后，该污水处理厂污泥处理处置和管理运行费用大幅降低，并可实现盈利，经济效益明显。
关键词: 扫频超声/
市政污泥/
脱水/
减量化
Abstract:Under the conditions of 20 to 100 kHz sweep-frequency ultrasound (cycle time=2 s), the dehydration and reduction of the concentrated sludges from a municipal sewage plant of 100 000 t·d-1 in South of Jiangsu was illustrated with non-directly contacted tube ultrasonic reactor. It was resulted that the optimized ultrasonic input power and action time on consideration of the processing cost and efficiency were 0.3 W·mL-1 and 0.5 min within the progresses of 20 to 100 kHz sweep-frequency ultrasound treatments. Compared with the original treatment, the converted volumes of the mud cakes (containing solid of 20%), the solid contents of the mixed liquids, coagulant dosages and sludge treatment costs of the new one were decreased by (43.8±1.2)%, (50.0±1.6)%, (38.9±1.7)% and (41.9±2.2)%, respectively. Moreover, the investment-recovery time of the ultrasound equipment was about 17 months after the reformation. Thus, the operation and management costs of the sludge treatment in the plant would be remarkably reduced and profited by the new ultrasonic process.
Key words:sweep-frequency ultrasound/
municipal sludge/
dehydration/
reduction.
| [1] | 郑贤助, 陈胜, 谢敏. 预浓缩调质+高压隔膜压滤机+烘干工艺处理污水厂污泥[J]. 中国资源综合利用, 2017,35(10):25-28 |
| [2] | 刘峻, 刘永德, 赵继红, 等. 超声处理对系统剩余污泥减量效果的研究[J]. 中国给水排水, 2011,27(1):58-60 |
| [3] | 闫怡新, 高健磊, 丁静雨. 超声波促进污泥过程减量化的研究进展及展望[J]. 环境工程, 2017,35(8):116-120 10.1007/s00170 017-1457-9 |
| [4] | JIMéNEZ M A, MEXICANO A, GARCíA F, et al.Ultrasound used to guarantee process control in the manufacture of components.A case study[J].International Journal of Advanced Manufacturing Technology, 2018,96(1/2/3/4):669–676 10.1007/s00170-017-1457-9 |
| [5] | 赵继红, 刘楠, 刘永德. 超声对SBR工艺中剩余污泥的减量化研究[J]. 环境科学与技术, 2008,31(2):77-79 10. 3969/j.issn.l 003-6504.2008.02.020 |
| [6] | XIE B Z, LIU H.Optimization of the proportion of the activated sludge irradiated with low-intensity ultrasound for improving the quality of wastewater treatment[J].Water, Air & Soil Pollution, 2011,215(1/2/3/4):621-629 10.1007/s11270-010-0504-z |
| [7] | 徐慧敏, 何国富, 熊南安, 等. 双频超声波促进剩余污泥的破解[J]. 环境工程学报, 2017, 11(4): 2452-2456 10.12030/j.cjee.201510194 |
| [8] | ZHANG P Y, WAN T, ZHANG G G.Enhancement of sludge gravitational thickening with weak ultrasound[J].Frontiers of Environmental Science & Engineering, 2012,6(5):753-760 10.1007/s11783-011-0368-5 |
| [9] | MAO H Z, CHI Y, WANG F, et al.Effect of ultrasonic pre-treatment on dewaterability and moisture distribution in sewage sludge[J].Waste and Biomass Valorization, 2018,9(2):247-253 10.1007/s12649-016-9799-3 |
| [10] | SHEN J F, YIN X, GU H P.Studies of ultrasound disintegration of residual sludge and its energy consumption in water treatment of petrochemical plant[J].Frontiers of Chemical Engineering in China, 2007,1(4):395-398 10.1007/s11705-007-0072-y |
| [11] | 喻艳菁, 丁国际, 邱慧琴, 等. 超声处理对剩余污泥的粒径和溶出物的影响[J]. 环境科学学报, 2009,29(4):703-708 10.332 l/j.issn:0253-2468.2009.04.005 |
| [12] | ZHANG Z Q, ZHANG J, ZHAO J F, et al.Effect of short-time aerobic digestion on bioflocculation of extracellular polymeric substances from waste activated sludge[J].Environmental Science and Pollution Research, 2015,22(3):1812-1818 10.1007/s11356-013-1887-3 |
| [13] | WESTERHOLM M, CRAUWELS S, VANGEEL M, et al.Microwave and ultrasound pre-treatments influence microbial community structure and digester performance in anaerobic digestion of waste activated sludge[J].Applied Microbiology and Biotechnology, 2016,100(12):5339-5352 10.1007/s00253-016-7321-2 |
| [14] | 李玉瑛, 何文龙, 邓斌, 等. 超声波联合高分子絮凝剂对污泥的调理研究[J]. 工业水处理, 2015,35(2):57-60 |
| [15] | SEGURA Y, PUYOL D, BALLESTEROS L, et al.Wastewater sludges pretreated by different oxidation systems at mild conditions to promote the biogas formation in anaerobic processes [J].Environmental Science and Pollution Research, 2016,23:24393-24401 10.10 07/s11356-016-7535-y |
| [16] | TYAGI V K, LO S L.Application of physico-chemical pretreatment methods to enhance the sludge disintegration and subsequent anaerobic digestion: An up to date review[J].Reviews in Environmental Science and Bio/Technology, 2011,10(3):215-242 10.1007/s11157-011-9244-9 |
| [17] | JUNG Y, KO H, JUNG B, et al.Application of ultrasonic system for enhanced sewage sludge disintegration: A comparative study of single- and dual- frequency[J].KSCE Journal of Civil Engineering, 2011,15(5):793-797 10.1007/s12205-011-0832-6 |
Turn off MathJax -->
点击查看大图计量
文章访问数:461
HTML全文浏览数:336
PDF下载数:125
施引文献:0
出版历程
刊出日期:2018-09-20
-->
扫频超声处理技术对市政污泥脱水与减量化处理效果
俞晟1,1.苏州市职业大学环境与分析实验室，苏州 215104
基金项目: 苏州市科技局（产业前瞻性应用研究（工业）指导性计划） 苏州市职业大学“青蓝工程”项目 苏州市职业大学课题（SVU2015YY02）
关键词: 扫频超声/
市政污泥/
脱水/
减量化
摘要:以苏南某10万t·d-1市政污水厂污泥浓缩池剩余污泥为研究对象，利用非直接接触管槽式超声反应器，在20~100 kHz扫频（周期2 s）超声条件下分析超声输入功率和超声时间对污泥脱水和减量化效果的影响。结果表明，在20~100 kHz扫频超声污泥处理工艺过程中，从处理成本和处理效率考虑，优化后的超声输入功率为0.3 W·mL-1、超声作用时间为0.5 min。与原工艺相比，泥饼折算体积Ω（含固率20%）、混合液含固率ρ、混凝剂用量以及每天污泥处理成本分别减少了(43.8±1.2)%、(50.0±1.6)%、(38.9±1.7)%和(41.9±2.2)%。此外，核算改造后污泥处理经济效益，设备投资回收时间为17个月。可见，引入新技术工艺后，该污水处理厂污泥处理处置和管理运行费用大幅降低，并可实现盈利，经济效益明显。
English Abstract
Dehydration and reduction treatment effects of sweep-frequency ultrasound on municipal sludge treatment
YU Sheng1,1.Laboratory of Environment and Analysis, Suzhou Vocational University, Suzhou 215104, China
Keywords: sweep-frequency ultrasound/
municipal sludge/
dehydration/
reduction
Abstract:Under the conditions of 20 to 100 kHz sweep-frequency ultrasound (cycle time=2 s), the dehydration and reduction of the concentrated sludges from a municipal sewage plant of 100 000 t·d-1 in South of Jiangsu was illustrated with non-directly contacted tube ultrasonic reactor. It was resulted that the optimized ultrasonic input power and action time on consideration of the processing cost and efficiency were 0.3 W·mL-1 and 0.5 min within the progresses of 20 to 100 kHz sweep-frequency ultrasound treatments. Compared with the original treatment, the converted volumes of the mud cakes (containing solid of 20%), the solid contents of the mixed liquids, coagulant dosages and sludge treatment costs of the new one were decreased by (43.8±1.2)%, (50.0±1.6)%, (38.9±1.7)% and (41.9±2.2)%, respectively. Moreover, the investment-recovery time of the ultrasound equipment was about 17 months after the reformation. Thus, the operation and management costs of the sludge treatment in the plant would be remarkably reduced and profited by the new ultrasonic process.
