自养脱氮工艺有机物去除段与硝化段精确分离的实现与实时控制

doi:10.3969/j.issn.0438-1157.2012.11.042

化工学报 ›› 2012, Vol. 63 ›› Issue (11): 3666-3672.DOI: 10.3969/j.issn.0438-1157.2012.11.042

自养脱氮工艺有机物去除段与硝化段精确分离的实现与实时控制

唐晓雪¹, 马斌², 徐竹兵¹, 彭永臻¹

1. 北京工业大学北京市水质科学与水环境恢复工程重点实验室, 北京 100124;
2. 哈尔滨工业大学城市水资源与水环境国家重点实验室, 黑龙江哈尔滨 150090

收稿日期:2012-03-20 修回日期:2012-05-21 出版日期:2012-11-05 发布日期:2012-11-05
通讯作者: 彭永臻
作者简介:唐晓雪(1985-),女,博士研究生。
基金资助:
高等学校博士学科点专项科研基金项目(优先发展领域)(20111103130002)。

Precise separation of organic removal and nitrification process and real-time control method of autotrophic nitrogen removal process

TANG Xiaoxue¹, MA Bin², XU Zhubing¹, PENG Yongzhen¹

1. Beijing Key Laboratory of Water Quality Science and Water Environment Recovery, Beijing University of Technology, Beijing 100124, China;
2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China

Received:2012-03-20 Revised:2012-05-21 Online:2012-11-05 Published:2012-11-05
Supported by:
supported by the Specialized Research Fund for the Doctoral Program of Higher Education(20111103130002).

摘要/Abstract

摘要： 为了实现城市污水处理过程中的节能降耗,提出了三段式城市污水自养脱氮工艺,阐述了除有机物SBR在整套工艺中的重要地位,探讨了不同曝气量与污泥浓度条件下,除有机物SBR中有机物的去除特征与规律。结果表明,在不同的曝气量及污泥浓度条件下,COD降解结束前NO₂^--N与NO₃^--N的浓度均低于0.1 mg·L^-1,反应器进入COD难降解阶段后,NO₂^--N与NO₃^--N的浓度快速提高,可以认为在除有机物SBR内有机物的去除和硝化过程是分步进行的,即先进行有机物的去除,而后进行硝化过程。DO曲线与pH曲线的突越点与除有机物过程的终点始终保持一致,可将其作为实时控制参数监测有机物的去除终点,对好氧曝气过程进行实时控制。

关键词: 城市污水, 自养脱氮, 有机物去除, 厌氧氨氧化, 实时控制

Abstract: To save energy consumption in domestic wastewater treatment,three-stage autotrophic nitrogen removal process including organics removal SBR,partial nitrification SBR and anammox UASB was proposed.At room temperature of (26±1)℃,short-term effect of aeration rate and MLSS on organic removal process was investigated by seeding activity sludge taken from a pilot-plant reactor of partial nitrification.The results show that both concentrations of NO₂^--N and NO₃^--N were lower than 0.1 mg·L^-1 at various aeration rates and sludge concentrations before the end of COD biodegradation stage.After that,the wastewater entered a difficult-degradating stage in reactor where COD concentration remained at nearly constant level and NO₂^--N and NO₃^--N concentrations accumulated rapidly and nitrifying-bacteria activity increased.Obviously,nitrification did not occur during the process removing organics under different aeration conditions.Therefore,under various conditions of aeration and sludge concentration the first organics was removed and then partial nitrification to remove NO₃^--N.However,for three-stage autotrophic nitrogen removal process,NO₄⁺-N concentration could decrease from 11.6 mg·L^-1 to 3.4 mg·L^-1(TN loss)during organics removal process under aeration values of 100 L·h^-1,60 L·h^-1and 20 L·h^-1.The peak point of pH profile and the inflexion of DO curve stayed the same with the end of removing organics throughout,and so they could be used as real-time control signals to indicate the end of organic removal process.

Key words: domestic wastewater, autotrophic nitrogen removal process, organic removal process, anammox, real-time control

中图分类号:

X703

唐晓雪, 马斌, 徐竹兵, 彭永臻. 自养脱氮工艺有机物去除段与硝化段精确分离的实现与实时控制[J]. 化工学报, 2012, 63(11): 3666-3672.

TANG Xiaoxue, MA Bin, XU Zhubing, PENG Yongzhen. Precise separation of organic removal and nitrification process and real-time control method of autotrophic nitrogen removal process[J]. CIESC Journal, 2012, 63(11): 3666-3672.

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自养脱氮工艺有机物去除段与硝化段精确分离的实现与实时控制

Precise separation of organic removal and nitrification process and real-time control method of autotrophic nitrogen removal process

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