UV/O3-Na2S2O8处理活性炭再生冷凝废水效能及机理

王燕; 邹吕熙; 茆林凤; 陈亚丽; 李激

doi:10.13205/j.hjgc.202007006

UV/O₃-Na₂S₂O₈处理活性炭再生冷凝废水效能及机理

doi: 10.13205/j.hjgc.202007006

王燕^1,2,
邹吕熙¹,
茆林凤³,
陈亚丽³,
李激^1,4,5, ,

1. 江南大学环境与土木工程学院, 江苏无锡 214122;
2. 江苏杰尔科技股份有限公司, 江苏无锡 214106;
3. 赢特环保科技(无锡)有限公司, 江苏无锡 214000;
4. 江苏省厌氧生物技术重点实验室, 江苏无锡 214122;
5. 江苏高校水处理技术与材料协同创新中心, 江苏苏州 215009

基金项目:

国家水体污染控制与治理科技重大专项（2017ZX07202-001-004）。

详细信息

作者简介:
王燕(1987-),女,博士,主要研究方向为废水处理工程。wangyanjnhj@126.com

通讯作者:
李激(1970-),女,博士,教授,主要研究方向为水污染控制与资源化。liji@jiangnan.edu.cn

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出版历程
- 收稿日期: 2020-02-15

EFFICIENCY AND MECHANISM OF UV/O₃-Na₂S₂O₈ IN TREATING ACTIVATED CARBON REGENERATION CONDENSATE WASTEWATER

WANG Yan^1,2,
ZOU Lv-xi¹,
MAO Lin-feng³,
CHEN Ya-li³,
LI Ji^{1,4,5
, ,}

1. School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;
2. Jiangsu GL Technology Co., Ltd, Wuxi 214106, China;
3. Yingtec Environment & Technology(Wuxi) Co., Ltd, Wuxi 214000, China;
4. Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi 214122, China;
5. Jiangsu University Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou 215009, China

摘要

摘要: 过热蒸汽法再生活性炭的过程中会产生大量含难降解有机物的冷凝废水，为去除冷凝废水中难降解COD，提高可生化性，采用紫外/臭氧活化过硫酸盐（UV/O₃-Na₂S₂O₈）氧化体系对活性炭再生冷凝废水进行处理，考察了O₃投加量、初始pH和Na₂S₂O₈投加量等因素对有机物处理效能的影响，并采用红外光谱、紫外-可见光谱和三维荧光等表征手段探究了冷凝废水处理过程中的变化机理。结果表明：当O₃投加量为30 mg/L，pH值为9.0，Na₂S₂O₈投加量为0.4 g/L时，在120 min内对冷凝废水的COD去除率达到82.1%，色度（CN）去除率达到86.3%。冷凝废水可生化性得到提高，BOD₅/COD值由0.17提升至0.46。由冷凝废水溶解性有机物（DOM）的表征可知，DOM中的腐殖质和发色基团被持续氧化，芳构化程度降低，色氨酸类有机物得到有效去除。结论表明，UV/O₃-Na₂S₂O₈氧化体系可有效去除冷凝废水中的难降解有机物。
- 紫外/臭氧活化 /
- 过硫酸盐 /
- 冷凝废水 /
- 处理效能 /
- 降解机理
Abstract: During the regeneration of activated carbon by superheated steam method, a large amount of condensed wastewater containing refractory organics will be produced. In order to remove the refractory COD in the condensed wastewater, improve the biodegradability and facilitate the subsequent biodegradation, UV/ozone activated persulfate(UV/O₃-Na₂S₂O₈) oxidation system was used to treat the activated carbon regeneration condensate wastewater. The effects of ozone dosage, initial pH and Na₂S₂O₈ dosage on the treatment efficiency of the organics were investigated. The changes in the treatment process of the condensate wastewater were investigated by means of infrared spectrum, UV-Vis spectrum and three-dimensional fluorescence. The results showed that when the dosage of ozone was 30 mg/L, pH was 9.0, and Na₂S₂O₈ dosage was 0.4 g/L, the removal rate of COD and chroma(CN) was 82.1% and 86.3%, respectively. The biodegradability of condensed wastewater was improved, and the BOD₅/COD value was increased from 0.17 to 0.46. It could be found from the characterization of dissolved organic matter(DOM) in condensed wastewater that humus and chromophore in DOM were oxidized continuously, and the aromatization degree was reduced. Tryptophan organics were effectively removed. The results showed that UV/O₃-Na₂S₂O₈ oxidation system could effectively remove the organics in the condensed wastewater.
- UV/ozone activation /
- persulfate /
- condensate wastewater /
- processing efficiency /
- degradation mechanism

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