中山大学学报自然科学版 ›› 2011, Vol. 50 ›› Issue (6): 125-129.

• 研究论文 • 上一篇    下一篇

大型生物膜反应器的宏观水流混合特性研究

孙国胜1,2,贾晓珊1

  

  1. (1中山大学环境科学与工程学院,广东 广州 510006;2广东粤港供水有限公司,广东 深圳 518021)
  • 收稿日期:2010-11-15 修回日期:1900-01-01 出版日期:2011-11-25 发布日期:2011-11-25
  • 通讯作者: 贾晓珊

Study on Flow Mixing Characteristics of the Largescale Biofilm Reactor

SUN Guosheng1,2,JIA Xiaoshan1   

  1. (1.School of Environmental Science and Engineering Sun Yatsen University, Guangzhou 510006,China;2. Guangdong Yuegang Water Supply CO,LTD, Shenzhen 518021,China)
  • Received:2010-11-15 Revised:1900-01-01 Online:2011-11-25 Published:2011-11-25

摘要: 基于多级理想完全混合反应器(CSTR)串联假设,以东深供水原水生物预处理工程(目前世界同类工程之最大规模工程)的生物接触氧化池为研究对象,采用罗丹明B作示踪剂试验,运用MATHLAB编程对各级反应器出口浓度系数和混合距离作曲线拟合,推算反应器的串联级数。结果表明:生物池单级CSTR长约13 m,全池270 m的CSTR反应器串联级数n=21;将生物池水流模型简单地视为推流式模型,将产生较大偏差;曝气管层的水流在每隔4.5 m区段有71.8%的水体发生交换,每级CSTR不存在短流情况。

关键词: 生物膜反应器, 水流模型, 示踪剂, 微污染原水, 曝气

Abstract: Based on the hypothesis of series multistage continuous stirred reactor(CSTR), rodamine B tracing experiments were carried out in the biocontact oxidation tank of Dongshen raw water biopretreatment engineering, the largest engineering in the world, in order to get the fitting curve of the outlet concentration coefficient and mixed distance of CSTR stages using Mathlab, and then calculate series number of the reactor. Results show that the length of a singlestage CSTR is 13 m. The whole tank series number of CSTR with a length of 270 m is 21. It is incorrect that the biotank is considered simply as a plug flow reactor. About 71.8% water exchange occurs every 4.5 m at the aeration tube layer. The short flow does not exist in a singlestage CSTR.

Key words: biofilm reactor, flow model, tracer, micropolluted raw water, aeration

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