Mn2+强化臭氧调理对生物处理工艺的污泥原位减量效果

doi:10.16085/j.issn.1000-6613.2022-1496

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

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.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.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/Abstract

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Y_obs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 Y_obs 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

中图分类号:

詹咏, 王慧, 韦婷婷, 朱星宇, 王先恺, 陈思思, 董滨. Mn²⁺强化臭氧调理对生物处理工艺的污泥原位减量效果[J]. 化工进展, 2023, 42(6): 3253-3260.

ZHAN Yong, WANG Hui, WEI Tingting, ZHU Xingyu, WANG Xiankai, CHEN Sisi, DONG Bin. In situ reduction effect of Mn²⁺ enhanced ozone conditioning on sludge in biological treatment process[J]. Chemical Industry and Engineering Progress, 2023, 42(6): 3253-3260.

图/表 10

参考文献 34

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实验试剂	用量/mg·L^-1
乙酸钠（CH₃COONa）	100.0
葡萄糖（C₆H₁₂O₆）	100.0
蔗糖（C₁₂H₂₂O₁₁）	100.0
淀粉 [(C₆H₁₀O₅) _n ]	100.0
氯化铵（NH₄Cl）	225.0
磷酸二氢钾（KH₂PO₃）	37.5
氯化钙（CaCl₂·2H₂O）	0.4
硫酸镁（MgSO₄·7H₂O）	5.0
氯化锰（MnCl₄·H₂O）	0.3
硫酸锌（ZnSO₄·7H₂O）	0.5
氯化铁（FeCl₃）	1.5
硫酸铜（CuSO₄·5H₂O）	0.4
氯化钴（CoCl₂·6H₂O）	0.4

实验试剂	用量/mg·L^-1
乙酸钠（CH₃COONa）	100.0
葡萄糖（C₆H₁₂O₆）	100.0
蔗糖（C₁₂H₂₂O₁₁）	100.0
淀粉 [(C₆H₁₀O₅) _n ]	100.0
氯化铵（NH₄Cl）	225.0
磷酸二氢钾（KH₂PO₃）	37.5
氯化钙（CaCl₂·2H₂O）	0.4
硫酸镁（MgSO₄·7H₂O）	5.0
氯化锰（MnCl₄·H₂O）	0.3
硫酸锌（ZnSO₄·7H₂O）	0.5
氯化铁（FeCl₃）	1.5
硫酸铜（CuSO₄·5H₂O）	0.4
氯化钴（CoCl₂·6H₂O）	0.4

分析指标	范围/mg·L^-1	平均值/mg·L^-1
COD	381.0~413.0	398.2
总氮（TN）	46.0~55.0	50.6
NH₄⁺-N	42.4~48.4	45.6
总磷（TP）	6.9~8.4	7.5
pH	6.9~7.1	7.0

分析指标	范围/mg·L^-1	平均值/mg·L^-1
COD	381.0~413.0	398.2
总氮（TN）	46.0~55.0	50.6
NH₄⁺-N	42.4~48.4	45.6
总磷（TP）	6.9~8.4	7.5
pH	6.9~7.1	7.0

指标	O₃组	O₃+Mn²⁺组
调理前出水COD平均浓度/mg·L^-1	37.5	41.1
调理后出水COD平均浓度/mg·L^-1	37.9	36.2
调理后COD去除率/%	90.5	90.9
调理前出水TN平均浓度/mg·L^-1	36.4	36.8
调理后出水TN平均浓度/mg·L^-1	35.7	35.8
调理后TN去除率/%	29.4	29.2
调理前出水NH₄⁺-N平均浓度/mg·L^-1	21.4	21.5
调理后出水NH₄⁺-N平均浓度/mg·L^-1	22.1	21.5
调理后NH₄⁺-N去除率/%	51.5	52.9
调理前出水TP平均浓度/mg·L^-1	4.5	4.4
调理后出水TP平均浓度/mg·L^-1	4.5	4.4
调理后TP去除率/%	40.0	41.3

Mn²⁺强化臭氧调理对生物处理工艺的污泥原位减量效果

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

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