Quick start and maintenance of nitrifying granular sludge in SBR process

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Quick start and maintenance of nitrifying granular sludge in SBR process

更新时间：2025-12-10

- Quick start and maintenance of nitrifying granular sludge in SBR process
- CIESC Journal Issue 11, (2010)
- 作者机构：
  
  北京工业大学环境与能源学院，北京市水质科学与水环境恢复工程重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 November 2010，
  
  Published：05 November 2010
- 稿件说明：
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吴蕾. Quick start and maintenance of nitrifying granular sludge in SBR process[J]. CIESC Journal, 2010, (11).
DOI：

吴蕾. Quick start and maintenance of nitrifying granular sludge in SBR process[J]. CIESC Journal, 2010, (11). DOI：

摘要

Abstract

In order to explore the optimal conditions of nitrifying sludge granulation

test was carried out in a sequencing batch reactor (SBR) at operation conditions: temperature 28℃

aeration 0.2 m3·h-1

dissolved oxygen(DO)>2.0 mg·L-1

sludge age (SRT) 15d

leading to settling time shorten to 2min. The granulation of nitrifying floccular activated sludge was achieved successfully after 80 stable cycles (19d) by parameter control of ammonia oxidation process

by optimization of aerobic time and against over-aeration

and average diameter of sludge granular obtained was between 1.5—2.0 mm. The efficiency of COD and ammonia removal was 80% and 95%

respectively. The nitrite accumulation rate (NO-2-N/NO-x-N) was over 95%.The quantitative results from fluorescence in situ hybridization (FISH) analysis for molecular biology show that the dominant micro-organism was still AOB

about 17.8% of total bacteria，while NOB only 0.6%. The main factors for stable performance of nitrification were FA inhibition and real-time control.

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