Effect of pretreatment methods on breaking up bacteria and solubilization of organic substances in waste activated sludge

SHENG Yuxing; CAO Hongbin; LI Yuping; ZHANG Yi

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Effect of pretreatment methods on breaking up bacteria and solubilization of organic substances in waste activated sludge

更新时间：2025-12-10

- Effect of pretreatment methods on breaking up bacteria and solubilization of organic substances in waste activated sludge
- CIESC Journal Issue 6, Pages: 1496-1501(2008)
- 作者机构：
  
  1. 中国科学院过程工程研究所
  2. 中国科学院研究生院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 June 2008，
  
  Published：05 June 2008
- 稿件说明：
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SHENG Yuxing, CAO Hongbin, LI Yuping, et al. Effect of pretreatment methods on breaking up bacteria and solubilization of organic substances in waste activated sludge[J]. CIESC Journal, 2008, (6): 1496-1501.
DOI：

SHENG Yuxing, CAO Hongbin, LI Yuping, et al. Effect of pretreatment methods on breaking up bacteria and solubilization of organic substances in waste activated sludge[J]. CIESC Journal, 2008, (6): 1496-1501. DOI：

摘要

废弃活性污泥(WAS)的生物处理效率直接取决于WAS中各种有机物的生物可降解性。为此需要对污泥进行预处理以提高污泥的生物消解效率。本文研究了碱处理、热处理、超声处理以及耦合处理对细胞内及胞外总有机物(TCOD)、多糖、细胞DNA等溶出行为的影响，并通过实验结果对3种预处理方法的处理行为进行了探讨。结果发现，热处理中，污泥中细胞破碎和有机物的溶出效果最好，热量在污泥中的传递效率决定热处理的效果。超声处理对污泥分散效果最好，超声效应首先容易发生在污泥中胞外聚合物(EPS)上。碱处理能够较好地削减污泥，并促进污泥溶液中的多糖进一步水解。

Abstract

The efficiency of treating waste activated sludge(WAS) by biologic methods is connected with efficiency of digesting the organic substances in WAS.In order to enhance the digestion rate of WAS

it needs to be pretreated.In this study

the effects of several pretreatment methods

including thermal

alkaline

ultrasonic and combined methods

on the solubilization of chemical oxygen demand (COD)

carbohydrates and DNA in WAS were investigated.It was found that the process of thermal pretreatment was the best in breaking up bacteria

and the effects of thermal pretreatment were related to the efficiency of heat transfer in the sludge.Ultrasonic pretreatment was the best in disintegration of WAS

and ultrasonic effects occurred more easily in extracellular polymeric substance (EPS).Alkaline pretreatment could reduce WAS well

and it could accelerate the hydroxylation of carbohydrates.

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