Chemical high concentration organic wastewater treatment is a common operation unit in chemical plants. There are many types of organic wastewater, such as coking wastewater, pharmaceutical wastewater, textile wastewater, printing and dyeing wastewater, petroleum/chemical wastewater, etc. These wastewaters are very common in life. If they are discharged directly, they will cause great pollution and damage to the environment. These wastewaters need to be treated before discharge.The following is a brief introduction to the methods and equipment for pretreatment of high concentration COD organic wastewater.
The main methods for treating high concentration COD organic wastewater include adsorption, biochemical method, solvent extraction, etc. Among them, solvent extraction is the most commonly used method. The process of using solvent extraction to treat high concentration COD organic wastewater is:
- Extraction: In high concentration COD organic wastewater, concentrated sulfuric acid is added to adjust the pH value of the wastewater, and then the extractant is added to dissolve the wastewater. The extractant extracts the COD in the wastewater, and the remaining wastewater enters the next section for treatment.
- Stripping: After the extractant comes out of the extraction section, it will contain a small amount of components. If it is not treated, it cannot be reused. If it is thrown away directly, it is too pity. Add a stripping agent to re-treat the loaded extractant, and then reuse it after treatment.
High Concentration COD Organic Wastewater Pretreatment Equipment
The centrifugal extractor is perfect for use with solvent extraction. It has a strong ability to remove fine particles and small molecular organic matter, especially has a good ability to reduce COD. And the operation process is simple and easy to operate.
CWL-M centrifugal extractor is a new, high efficiency liquid-liquid extraction and separation equipment independently developed and produced by Zhengzhou Tiei Extraction. It can be effectively used for the pretreatment of chemical organic wastewater, and extraction operations in many fields such as chemical industry, hydrometallurgy, petroleum, and fine chemicals.
How to treat high concentration COD organic wastewater specifically also needs to be combined with the water quality. For example, if the water contains impurities or emulsified oil, the pretreatment process must be added first; if the wastewater treatment results are very high, after being treated with a centrifugal extractor, it needs to enter the biochemical section for further treatment.
Centrifugal extractor is used to treat high concentration COD organic wastewater, which can effectively reduce the COD in the wastewater, so that the wastewater meets the standards for discharge or recycling.
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