摘要
为考察超声破解剩余污泥的化学效应,用超声对细菌和剩余污泥各作用0~40 min,测量其过程中产生的H_(2)O_(2)质量浓度,再用0~40 min内产生相应量的H_(2)O_(2)作用细菌和剩余污泥,并对比分析加入异丙醇前后超声对剩余污泥的破解情况。研究结果表明:超声作用细菌和剩余污泥后H_(2)O_(2)浓度持续增加,验证了超声空化存在化学效应,超声和H_(2)O_(2)对细菌均有破解作用,超声空化的多种效应能促使细胞质流出。通过对比超声和H_(2)O_(2)对剩余污泥的破解率、超声和添加异丙醇的超声作用剩余污泥后核酸和肽聚糖浓度的降低率发现,超声空化的化学效应对剩余污泥破解的贡献率为10%左右。
To investigate the chemical effect of ultrasonic disintegration of excess sludge,bacteria and excess sludge were treated with ultrasonic for 0-40 min,and the content of H_(2)O_(2)produced during the process was measured.In ad⁃dition,bacteria and excess sludge were treated with the same amount of H_(2)O_(2)as produced during the ultrasonic pro⁃cess.The effect of isopropanol on the ultrasonic disintegration of excess sludge was analyzed.The results showed that the content of H_(2)O_(2)increased continuously after ultrasonic treatment of bacteria and excess sludge,which veri⁃fied the existence of the chemical effect of ultrasonic cavitation.Both ultrasonic and H_(2)O_(2)had disintegration effect on bacteria,and multiple effects of ultrasonic cavitation could promote cytoplasmic efflux.By comparing the disinte⁃gration rates of ultrasonic and H_(2)O_(2)on excess sludge,and the reduction rates of nucleic acid and peptidoglycan con⁃centration after ultrasonic and ultrasonic with the addition of isopropanol,it was concluded that the chemical effect of ultrasonic cavitation contributed about 10%to the disintegration of excess sludge.
作者
由美雁
韩进
张秀秀
谢元华
朱彤
YOU Meiyan;HAN Jin;ZHANG Xiuxiu;XIE Yuanhua;ZHU Tong(School of Mechanical Engineering and Automation Northeastern University,Shenyang 110819,China;College of Sciences,Northeastern University,Shenyang 110819,China)
出处
《工业水处理》
北大核心
2025年第8期90-95,共6页
Industrial Water Treatment
基金
国家重点研发计划课题(N2020YFC1806402)
教育部项目基本科研业务费项目国家项目培育种子基金项目(N150304002)。
关键词
超声
剩余污泥
污泥破解
细菌
ultrasonic
excess sludge
sludge disintegration
bacteria
作者简介
第一作者:由美雁(1976—),博士,讲师,E-mail:myyou@mail.neu.edu.cn;通讯作者:朱彤,博士,教授,E-mail:tongzhu@mail.neu.edu.cn。
