化工进展 ›› 2015, Vol. 34 ›› Issue (07): 2049-2054,2079.DOI: 10.16085/j.issn.1000-6613.2015.07.040

• 资源与环境化工 • 上一篇    下一篇

响应面法优化微波热解剩余污泥产酸

闫凤英1,2, 池勇志1,2, 刘晓敏3, 田哲2, 张昱2, 费学宁1   

  1. 1 天津城建大学环境与市政工程学院天津市水质科学与技术重点实验室, 天津 300384;
    2 中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;
    3 天津华兴勘察设计有限公司, 天津 300241
  • 收稿日期:2014-12-10 修回日期:2015-01-06 出版日期:2015-07-05 发布日期:2015-07-05
  • 通讯作者: 池勇志,教授,从事污泥、污水处理与资源化理论和技术研究。E-mail:yzchi@tcu.edu.cn。
  • 作者简介:闫凤英(1988—),女,硕士研究生。E-mail:yanfengying0428@126.com。
  • 基金资助:
    国家国际科技合作专项项目(2013DFG50150)。

Application of response surface methodology for volatile fatty acids recovery from waste activated sludge using microwave pretreatment process

YAN Fengying1,2, CHI Yongzhi1,2, LIU Xiaomin3, TIAN Zhe2, ZHANG Yu2, FEI Xuening1   

  1. 1 Tianjin Key Laboratory of Water Quality Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China;
    2 State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, CAS, Beijing 100085, China;
    3 Tianjin Huaxing Exploration & Design Co., Ltd., Tianjin 300241, China
  • Received:2014-12-10 Revised:2015-01-06 Online:2015-07-05 Published:2015-07-05

摘要: 目前微波预处理污泥主要局限在污泥水解率及其对厌氧消化的影响, 常用溶解性COD来进行表征预处理效果, 在污泥产酸方向少有报道。为了确定微波热解剩余污泥产酸的最佳工艺条件, 通过单因素实验选取实验因素与水平, 根据中心组合设计原理, 在单因素试验的基础上采用四因素三水平的响应面分析法, 考察了微波加热温度、微波加热时间、过氧化氢投加量和乙酸投加量对污泥产酸的影响。微波热解剩余污泥产酸的最佳工艺条件为:加热温度180℃, 加热时间21min, 过氧化氢投加量0.18g/(gSS), 乙酸投加量49mg/(gSS), 最大预测乙酸增量值581mg/L, 试验值与预测值之间的相对偏差在0.033~0.074之间。研究结果表明:本工艺可有效提高污泥有机酸产率, 试验值与预测值吻合较好, 可为污泥原位碳源开发提供理论和实际指导。

关键词: 废物处理, 辐射, 优化设计, 微波预处理, 剩余污泥, 乙酸

Abstract: The current microwave pretreatment of waste activated sludge is limited to sludge hydrolysis ratio and the effect to anaerobic digestion, soluble COD is often used to evaluate pretreatment effect, and volatile fatty acids recovery from sludge is rarely reported. In order to determine the optimal process conditions of volatile fatty acids recovery from waste activated sludge using microwave pretreatment process, the factors and their levels were established by single factor experiment first, and response surface methodology of four factors and three levels was used based on the center combination design. The four factors included heating temperature, heating time, dosage of H2O2, and dosage of acetic acid. The optimal process conditions were as follows:microwave heating temperature of 180℃, microwave heating time of 21min, H2O2 dosage of 0.18g/(gSS), acetic acid dosage of 49mg/(gSS). Under these conditions, the maximum predicted acetic acid concentration was 581mg/L, the relative deviation was 0.033—0.074 between the predicted values and the experimental values. The results showed that this method could effectively improve volatile fatty acids recovery from sludge, the predicted values were in accordance with the experimental values, and this method could provide theoretical and practical guidance for in situ carbon source production from sludge.

Key words: waste treatment, radiation, optimal design, microwave pretreatment, waste activated sludge, acetic acid

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