化工进展

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超声促进污泥厌氧消化效能及其机理

徐贵华,陈少华,石建稳   

  1. 中国科学院城市环境研究所城市环境与健康重点实验室,福建 厦门 361021
  • 出版日期:2010-11-05 发布日期:2010-11-05

Improving sludge anaerobic digestion performance by ultrasound and its mechanism

XU Guihua,CHEN Shaohua,SHI Jianwen   

  1. Institute of Urban Environment,Chinese Academy of Sciences,Key Laboratory of Urban Environment and Health,Xiamen 361021,Fujian,China
  • Online:2010-11-05 Published:2010-11-05

摘要:

污泥厌氧消化时间长,是一个缓慢的过程,其中水解是其主要限速步骤。针对这一问题,利用超声破碎污泥絮体和细胞壁加速污泥水解过程,从而达到促进厌氧消化的目的。研究结果表明:超声处理可显著提高污泥厌氧消化性能,起主导作用的是空化泡破碎产生的水力剪切力。

Abstract:

Anaerobic digestion is a very slow process with a long retention timesince the hydrolysis is the main rate-limiting step. In order to solve this problemultrasound was utilized to promote the anaerobic digestion process by disrupting sludge flocs and microbial cell walls. Results showed that ultrasound treatment could obviously improve the anaerobic biodegradability of sludgeand the hydromechanical shear force produced by ultrasonic cavitations was responsible for sludge disintegration.

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