东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (6): 868-872.DOI: 10.12068/j.issn.1005-3026.2015.06.024

• 资源与土木工程 • 上一篇    下一篇

厌氧处理结合超声空化高效破解剩余污泥

李现瑾， 苑春莉， 余宏， 朱彤   

  1. (东北大学 机械工程与自动化学院， 辽宁 沈阳110819)
  • 收稿日期:2014-04-29 修回日期:2014-04-29 出版日期:2015-06-15 发布日期:2015-06-11
  • 通讯作者: 李现瑾
  • 作者简介:李现瑾(1987-)，男，山东菏泽人，东北大学博士研究生； 朱彤(1963-)，男，陕西白水人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51178089)； 中央高校基本科研业务费专项资金资助项目(N140306001)； 教育部高等学校博士学科点专项科研基金资助项目(20130042110009).

Disintegrating Efficiently of Excess Sludge by Combined Anaerobic Treatment and Ultrasonic Cavitation

LI Xian-jin， YUAN Chun-li， YU Hong， ZHU Tong   

  1. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China.
  • Received:2014-04-29 Revised:2014-04-29 Online:2015-06-15 Published:2015-06-11
  • Contact: ZHU Tong
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摘要： 为了提高超声空化破解剩余污泥的效率，进而提高污泥的可生化性能，提出先进行短时间的厌氧处理，再进行超声空化的破解方案；并对厌氧0~6d的污泥进行了超声破解实验研究.实验结果显示:随着厌氧时间的增加，污泥自身性质发生较大改变，如化学需氧量(COD)、肽聚糖浓度大幅度增加，pH值明显降低等；对厌氧污泥进行破解，其破解效果优于新鲜污泥:对厌氧6d的污泥进行破解，其COD浓度是新鲜污泥的99.3倍，是新鲜污泥破解后的9.5倍.厌氧处理可以降低污泥的破解难度，在较大程度上提高超声空化强度，该工艺可以实现高效破解剩余污泥的目的.

关键词: 厌氧处理, 超声空化, 剩余污泥, 污泥破解, 预处理

Abstract: In order to improve the efficiency of disintegrating excess sludge and then to improve the performance of sludge biodegradability by using ultrasonic cavitation， a program of disintegrating excess sludge by ultrasonic cavitation after a short anaerobic treatment was proposed. In the experiment， excess sludge was treated 0~6days by anaerobic digestion and then disintegrated by ultrasonic cavitation. The results show as follows: with increasing of anaerobic digestion time， the properties of sludge change greatly， for example， the concentration of chemical oxygen demand(COD)and peptidogly can increase significantly， while the pH value drop observably. The efficiency of using ultrasonic cavitation method to disintegrate excess sludge after a process of anaerobic digestion is better than disintegrating excess sludge directly. For example， the result of disintegrating the excess sludge treated 6 days by anaerobic digestion shows that the concentration of COD is 99.3 times of the sludge without disintegrating， and 9.5 times of excess sludge without anaerobic digestion. This study considers that anaerobic digestion can reduce the difficulty of sludge disintegrating and the process of anaerobic digestion can significantly improve the intensity of ultrasonic cavitation to a large extent. Therefore， the process can achieve the aim of disintegrating the excess sludge efficiently.

Key words: anaerobic treatment, ultrasonic cavitation, excess sludge, sludge disintegrating, pretreatment

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