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Improvement and production practice of treating wastewater from vegetable oil refining
  
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KeyWord:Key words：vegetable oil  wastewater from refining  process  improvement  production practice
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ZHANG Juan, ZHU Zi  
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Abstract:
      Abstract：The treatment technology of wastewater from vegetable oil refining was improved by adding pretreatment process. The practice showed that compared with the original process, adding static settlement to separate oil, three-stage inclined plate oil separation, air flotation after ferrous sulfate flocculation and Fenton oxidation pretreatment processes could reduce the CODCr and phosphate content in discharge wastewater by 78.41% and 78.57% on average respectively, reduce the sludge content by 65.04% on average, and the discharge water quality reached the national first-level standard. In addition, the amount of byproduct soap increased by 36.84%, which increasing the economic benefits. The new process was easy to operate and was suitable for the treatment of vegetable oil refining wastewater.
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