化工进展 ›› 2023, Vol. 42 ›› Issue (6): 3253-3260.DOI: 10.16085/j.issn.1000-6613.2022-1496

• 资源与环境化工 • 上一篇    下一篇

Mn2+强化臭氧调理对生物处理工艺的污泥原位减量效果

詹咏1(), 王慧1,2, 韦婷婷1,2, 朱星宇1, 王先恺3, 陈思思2, 董滨2,3()   

  1. 1.上海理工大学环境与建筑学院,上海 200093
    2.同济大学环境科学与工程学院,上海 200092
    3.中国长江三峡集团有限公司长江生态环境工程研究中心,北京 100038
  • 收稿日期:2022-08-15 修回日期:2022-11-28 出版日期:2023-06-25 发布日期:2023-06-29
  • 通讯作者: 董滨
  • 作者简介:詹咏(1971—),女,博士,副教授,研究方向为水污染控制。E-mail:jannet6@163.com
  • 基金资助:
    国家自然科学基金重大项目(52193268014);国家重点研发计划(2020YFC1908704);中国长江三峡集团有限公司项目(202003166)

In situ reduction effect of Mn2+ enhanced ozone conditioning on sludge in biological treatment process

ZHAN Yong1(), WANG Hui1,2, WEI Tingting1,2, ZHU Xingyu1, WANG Xiankai3, CHEN Sisi2, DONG Bin2,3()   

  1. 1.School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
    2.College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
    3.Yangtze Eco-Environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, China
  • Received:2022-08-15 Revised:2022-11-28 Online:2023-06-25 Published:2023-06-29
  • Contact: DONG Bin

摘要:

剩余污泥产量大、处置难已成为我国污水处理厂普遍面临的难题,近年来,采用臭氧氧化的旁路调理实现污泥原位减量技术受到关注。本研究采用小试序批式活性污泥法(SBR)装置,对比单独臭氧氧化(O3组)与Mn2+催化臭氧氧化(O3+Mn2+组)的旁路调理,对活性污泥系统的污泥原位减量效果、出水水质及污泥特性变化的差异,以验证Mn2+催化臭氧氧化的实际应用效果。结果表明:O3+Mn2+组污泥原位减量效果优于O3组,Mn2+的添加对SBR工艺出水水质无明显负面影响,且O3+Mn2+调理后出水COD、NH4+-N、TP的去除率略高于O3组;传统SBR工艺剩余污泥表观产率系数Yobs为0.32gMLSS/gCOD,O3组下降至0.25gMLSS/gCOD,O3+Mn2+组下降至0.21gMLSS/gCOD,分别降低了21.9%和34.4%,从污泥浓度(MLSS)来看,O3+Mn2+组剩余污泥减量率为O3组的2.6倍;同时,O3+Mn2+组活性污泥的絮凝、沉降、脱水性能均进一步改善。

关键词: 二价锰离子, 臭氧氧化, 化学需氧量, 污泥减量, 污泥特性

Abstract:

Large production and difficult disposal of excess sludge has become a common problem faced by sewage treatment plants in China. In recent years, the use of ozone oxidation by-pass conditioning to achieve in-situ sludge reduction technology has attracted attention. A continuous SBR device was used to compare the differences in sludge reduction effect, effluent water quality and sludge characteristics between separate ozone oxidation (O3) and Mn2+ catalytic ozone oxidation conditioning (O3+Mn2+) to verify the practical application effect of Mn2+ catalyzed ozone oxidation. The results showed that the in-situ reduction effect of sludge in O3+Mn2+ group was better than that of O3 group, and the addition of Mn2+ had no obvious negative impact on the effluent quality of SBR process, and the removal efficiency of COD, NH4+-N and TP after O3+Mn2+ conditioning was slightly higher than that of O3 group.The apparent sludge yield coefficient Yobs of traditional activated sludge system was 0.32gMLSS/gCOD, group O3 decreased to 0.25gMLSS/gCOD and the group O3+Mn2+ decreased to 0.21gMLSS/gCOD, they decreased by 21.9% and 34.4%, respectively. From the sludge concentration (MLSS), the sludge reduction rate of group O3+Mn2+ was 2.6 times of group O3. At the same time, the flocculation, sedimentation and dehydration performance of activated sludge in the group O3+Mn2+ were all further improved.

Key words: manganese ion, ozone oxidation, chemical oxygen demand (COD), sludge reduction, sludge characteristics

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