Xin Feng , Hengyi Lei , Jinchuan Deng , Qiang Yu , Hualiang Li
{"title":"Physical and chemical characteristics of waste activated sludge treated ultrasonically","authors":"Xin Feng , Hengyi Lei , Jinchuan Deng , Qiang Yu , Hualiang Li","doi":"10.1016/j.cep.2008.03.012","DOIUrl":null,"url":null,"abstract":"<div><p>This study investigates the physical–chemical characteristics of sludge treated with controlled levels of ultrasound. The results indicate that the energy used for sonication strongly influences the physical–chemical characteristics of sludge. Based on turbidity and settling velocity measurements, 1000<!--> <!-->kJ/kg total solids (TSs) is recommended as an optimal specific energy input for improving sludge settling. For purposes of sludge disintegration, applying higher specific energies to the sludge is more efficient than applying lower levels. Nevertheless, a single, optimal energy level for thoroughly disintegrating sludge could not be determined. Possible mechanisms of ultrasonic treatment are also discussed.</p></div>","PeriodicalId":9929,"journal":{"name":"Chemical Engineering and Processing - Process Intensification","volume":"48 1","pages":"Pages 187-194"},"PeriodicalIF":3.8000,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.cep.2008.03.012","citationCount":"139","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering and Processing - Process Intensification","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0255270108000780","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 139
Abstract
This study investigates the physical–chemical characteristics of sludge treated with controlled levels of ultrasound. The results indicate that the energy used for sonication strongly influences the physical–chemical characteristics of sludge. Based on turbidity and settling velocity measurements, 1000 kJ/kg total solids (TSs) is recommended as an optimal specific energy input for improving sludge settling. For purposes of sludge disintegration, applying higher specific energies to the sludge is more efficient than applying lower levels. Nevertheless, a single, optimal energy level for thoroughly disintegrating sludge could not be determined. Possible mechanisms of ultrasonic treatment are also discussed.
期刊介绍:
Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.