Refined Cotton Production Wastewater Treatment Solutions
Date:Mar 18th, 2022
Refined cotton is a high-purity cellulose product obtained from cotton linters after alkali cooking, bleaching and other treatments process. Refined cotton is mainly used for the manufacture of cellulose esters, ethers and other cellulose derivatives. The products are widely used in food, textile, cellulose ether, building materials, medicine, chemicals, plastics, electronics, military, paper making, metallurgy, aerospace and many other fields.
In the production process, a large amount of production wastewater with high concentration, high chroma and high alkalinity will be discharged. The wastewater mainly contains various pulp, lignin, additives, and alkali, etc.; cooking black liquor has high PH value and COD in above 40000mg/l. If it is directly discharged without treatment or if the treatment does not meet the standard, it will pollute the water body and damage the local soil structure, which seriously affects the growth of crops, so the wastewater from refined cotton production must be effectively treated before it can be discharged.
According to the actual situation of wastewater in refined cotton production enterprises, “Dingsheng Machinery” designs the process of "LEM electrochemical catalytic oxidation + LDF heterogeneous catalytic oxidation" for wastewater pretreatment, which reduces the COD, and improves the biodegradability of wastewater for subsequent biochemical treatment.
The solution for wastewater treatment:
1, Cooking black liquor → liquid storage tank → reaction tank (+ waste hydrochloric acid) → plate and frame filter press → advanced catalytic oxidation system → bleaching water mixing system
2, Comprehensive wastewater → reaction tank → adjustment tank → anaerobic tank → contact oxidation tank → flocculation tank → decolorization reaction sedimentation tank → discharge
After the wastewater pretreatment process, the B/C ratio of the wastewater is greatly improved, and the COD removal rate is >60%, which fully meets the conditions for biodegradation. After multi-stage oxidation treatment, it can be directly entered into biochemical treatment for further treatment, so that the final effluent COD is less than 500 mg/L for discharge up to the standard.
“Dingsheng Machinery” provide complete sets of professional refined cotton production equipment and high-value water treatment solutions for various types of industrial wastewater, contact us now to learn more about the wastewater treatment process.
In the production process, a large amount of production wastewater with high concentration, high chroma and high alkalinity will be discharged. The wastewater mainly contains various pulp, lignin, additives, and alkali, etc.; cooking black liquor has high PH value and COD in above 40000mg/l. If it is directly discharged without treatment or if the treatment does not meet the standard, it will pollute the water body and damage the local soil structure, which seriously affects the growth of crops, so the wastewater from refined cotton production must be effectively treated before it can be discharged.
According to the actual situation of wastewater in refined cotton production enterprises, “Dingsheng Machinery” designs the process of "LEM electrochemical catalytic oxidation + LDF heterogeneous catalytic oxidation" for wastewater pretreatment, which reduces the COD, and improves the biodegradability of wastewater for subsequent biochemical treatment.
The solution for wastewater treatment:
1, Cooking black liquor → liquid storage tank → reaction tank (+ waste hydrochloric acid) → plate and frame filter press → advanced catalytic oxidation system → bleaching water mixing system
2, Comprehensive wastewater → reaction tank → adjustment tank → anaerobic tank → contact oxidation tank → flocculation tank → decolorization reaction sedimentation tank → discharge
After the wastewater pretreatment process, the B/C ratio of the wastewater is greatly improved, and the COD removal rate is >60%, which fully meets the conditions for biodegradation. After multi-stage oxidation treatment, it can be directly entered into biochemical treatment for further treatment, so that the final effluent COD is less than 500 mg/L for discharge up to the standard.
“Dingsheng Machinery” provide complete sets of professional refined cotton production equipment and high-value water treatment solutions for various types of industrial wastewater, contact us now to learn more about the wastewater treatment process.
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