Volume 10 Issue 2
Mar.  2020
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Article Navigation >  Journal of Environmental Engineering Technology  > 2020  >  10(2): 260-266
WANG Hong, ZHANG Meng, ZHU Zemin, SONG Yudong, LI Jie, XIAO Juqiang, ZHOU Yuexi. Alkaline detoxification pretreatment of acetaldehyde wastewater under the condition of long reaction time[J]. Journal of Environmental Engineering Technology, 2020, 10(2): 260-266. doi: 10.12153/j.issn.1674-991X.20190130
Citation: WANG Hong, ZHANG Meng, ZHU Zemin, SONG Yudong, LI Jie, XIAO Juqiang, ZHOU Yuexi. Alkaline detoxification pretreatment of acetaldehyde wastewater under the condition of long reaction time[J]. Journal of Environmental Engineering Technology, 2020, 10(2): 260-266. doi: 10.12153/j.issn.1674-991X.20190130
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Alkaline detoxification pretreatment of acetaldehyde wastewater under the condition of long reaction time

doi: 10.12153/j.issn.1674-991X.20190130

  • 1. School of Resources and Environmental Engineering, Jilin Institute of Chemical Technology

  • 2. State Key Laboratory of Environmental Criteria and Risk Assessment

  • 3. Research Center of Environmental Pollution Control Technology, Chinese Research Academy of Environmental Sciences

  • 4. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University

More Information
  • Corresponding author: Yuexi ZHOU E-mail: zhouyuexi@263.net
  • Received Date: 2019-07-28
  • Publish Date: 2020-03-20
    Abstract
  • Acetaldehyde wastewater contains high concentration of toxic organic compounds, including aldehydes and organochlorines. It has strong inhibition on the microorganisms in wastewater biological treatment system, and it is difficult to treat directly by biological treatment, so detoxification pretreatment is needed. The effects of prolonging reaction time and raising reaction temperature on the dosage of alkali required for alkaline detoxification of acetaldehyde wastewater were investigated. The results indicated that alkaline pretreatment could effectively remove aldehydes and organochlorine toxic organic compounds from wastewater, and significantly reduce the anaerobic biological toxicity and aerobic biological toxicity of wastewater. The anaerobic biological toxicity was more reasonable for the evaluation of detoxification efficiency than the concentration of toxic substances. Prolonging reaction time and raising reaction temperature were beneficial to reducing the alkali dosage required for sufficient detoxification of acetaldehyde wastewater. When the reaction time was prolonged from 3 h to 10 h, the reaction temperature was raised from 60 ℃ to 70 ℃, the alkali dosage required for the sufficient detoxification was reduced by 50%, and the cost of regents saved by about 3.7 yuan per ton of wastewater.

     

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