Sludge Deposition Analysis and Flow Pattern Test on OxidationDitch Integrated A/A/O Technique

LI Bo-lin; ZHANG Zhi; LIU Shao-wu; LU Chang-song; CHAI Hua; WANG Wei-zhong; YUAN Xiang-gui

doi:10.11835/j.issn.1674-4764.2011.01.020

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Sludge Deposition Analysis and Flow Pattern Test on OxidationDitch Integrated A/A/O Technique

更新时间：2023-11-28

- Sludge Deposition Analysis and Flow Pattern Test on OxidationDitch Integrated A/A/O Technique
- Journal of Civil and Environmental Engineering Vol. 33, Issue 1, Pages: 118-123(2011)
- 作者机构：
  
  1. 重庆大学城市建设与环境工程学院,三峡库区生态环境教育部重点实验室,重庆,400045
  2. 重庆水务集团股份有限公司,重庆,400015
- 作者简介：
- 基金信息：
- DOI：10.11835/j.issn.1674-4764.2011.01.020
  CLC：
- Published：2011
- 稿件说明：
移动端阅览
LI Bo-lin, ZHANG Zhi, LIU Shao-wu, et al. Sludge Deposition Analysis and Flow Pattern Test on OxidationDitch Integrated A/A/O Technique[J]. Journal of Civil and Environmental Engineering, 2011, 33(1): 118-123.
DOI：

LI Bo-lin, ZHANG Zhi, LIU Shao-wu, et al. Sludge Deposition Analysis and Flow Pattern Test on OxidationDitch Integrated A/A/O Technique[J]. Journal of Civil and Environmental Engineering, 2011, 33(1): 118-123. DOI： 10.11835/j.issn.1674-4764.2011.01.020.

摘要

为了探求氧化沟内流速分布规律

解决积泥问题并实现系统能量的优化配置

以重庆市某污水处理厂的A/A/O氧化沟为试验平台

根据曝气转盘及水下推流器的不同组合方式设计了3种试验工况

重点对氧化沟外沟大弯段处的流速分布进行了测试及分析。结果表明：第1沟段下部流速过大容易造成能量浪费

间歇开/停水下推流器可以优化系统的能量配置；第2沟段水力情况复杂

外侧流速高、内侧流速低

形成了明显的滞水区

造成了内侧部分区域积泥；提出了解决积泥问题的措施

即在第2沟段的弯道处加设偏心导流墙、调整水下推流器的位置。

Abstract

To study the velocity distribution rule

the sludge deposition and the energy-optimized distribution of the oxidation ditch

the experiment was processed in a WWTP with A/A/O Oxidation Ditch technology. The study individually focused on the velocity distribution of curved sections in out-ditch by testing three operation conditions of the Oxidation Ditch. The result shows: firstly

the velocity of the first ditch is too large; easily lead to waste of energy

intermittent on/off submerged flow drivers can optimize the energy distribution of the system. Secondly

in the second ditch

the flow pattern in crook ditches were very complex

there existed high velocity outside and low inside. For such situation

it is easy to cause sludge deposit in the inside of the ditch. Finally

in order to improve the problem of sludge deposition

the measures were put forward as follows: installing off-center training in curved sections of the second ditch

adjusting the position of submerged flow driver.

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