Pretreatment method of cellulosic ethanol production wastewater

Pretreatment method of cellulosic ethanol production wastewater

  • CN 103,771,613 A
  • Filed: 10/23/2012
  • Published: 05/07/2014
  • Est. Priority Date: 10/23/2012
  • Status: Active Application
First Claim
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1. a pretreatment process for cellulose ethanol production wastewater, is characterized in that comprising following process:

  • (1) lime alkali is analysed processing, fully mixes after cooling from cellulose ethanol base product mash in line mixer with milk of lime, and the sulfate radical in waste water is reacted with milk of lime generation calcium sulfate precipitation, removes sulfate ion;

    (2) coagulation clarification processing, step (1) lime alkali is analysed composite waste after treatment and is entered coagulation clarification pond, under coagulating agent and the effect of residue milk of lime coagulant aids, the calcium sulfate precipitation thing generating in water and original high concentration suspended matter is removed by clarification;

    (3) ozone Oxidation Treatment, step (2) waste water after treatment is sent into ozone-oxidizing device, by ozone oxidation agent, the difficult for biological degradation organic matter in waste water and color development degree thing are oxidized to the low-molecular material of biodegradability, reach decolouring and improve wastewater biodegradability object.

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