Research on Ultrasonic Treatment in the Field of Actual Excess Sludge Treatment

Author:

Zhao Wei,Zhan Xianhui,Liu Weilin,Wang Shuang,Deng Jiangyang,Wei Daiyan,Sun Meng

Abstract

Abstract It is generally known that that the carbon source is always insufficient in biological denitrification, and the excess sludge is difficult to dispose of in wastewater plants. This study explored the optimized ultrasonic treatment method for the excess sludge for denitrification of sewage. The response surface methodology of three factors and three levels was used to investigate the effects of ultrasound energy density, ultrasonic time and pH on cell-lysis rate, and the optimum process parameters for ultrasonic treatment for excess sludge were confirmed. The optimum cell-lysis rate was 33.891 ± 0.5% at the ultrasonic sound energy density was 2.0 W·mL−1, ultrasonic time was 40 min and pH was 7.0. The detection of the coliforms including E.coli before and after ultrasonic cracking showed that the ultrasonically cracked sludge could kill these pathogenic bacteria and achieve the effect of making the excess sludge harmless. The ultrasonic treatment experiments showed that ultrasonic treatment could inactivate these pathogenic bacteria (including E.coli) and make the excess sludge harmless.

Publisher

IOP Publishing

Subject

General Engineering

Reference18 articles.

1. Ultrasound treatment of excess sludge as carbon source to strengthen denitrification of wastewater;Zhao;Environmental Engineering,2019

2. Optimization of ultrasonic irradiation as an advanced oxidation technology;Hua;Environmental Science and Technology,1997

3. The chemical effects of ultrasound;Suslick;Scientific American,1989

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3