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Volume 38 Issue 7
Nov.  2020
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2020  >  38(7): 38-44
LI Anna, WANG Hui, LIU Qiangnan, LI Taiping. DISTRIBUTION CHARACTERISTICS AND RISK ASSESSMENT OF SOIL POLLUTANTS IN AN EXPLOSION SITE OF A CHEMICAL PLANT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 189-198. doi: 10.13205/j.hjgc.202211027
Citation: WANG Yan, ZOU Lv-xi, MAO Lin-feng, CHEN Ya-li, LI Ji. EFFICIENCY AND MECHANISM OF UV/O3-Na2S2O8 IN TREATING ACTIVATED CARBON REGENERATION CONDENSATE WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(7): 38-44. doi: 10.13205/j.hjgc.202007006
shu

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

doi: 10.13205/j.hjgc.202007006

  • 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

  • Received Date: 2020-02-15
    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.
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