Treatment of wastewater generated from chemical production
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I am very happy to discuss with you here the treatment of wastewater generated by chemical production. I feel that in the treatment of chemical wastewater, physical and chemical means must be fully used to remove toxic and harmful substances, and then biochemical treatment is adopted! I wonder if everyone agrees? I hope everyone can discuss it here. This post was last edited by johncom on 2009-3-7 11:36 ]
Make full use of physical and chemical means to remove/recycle valuable substances
After some chemical wastewater, such as p-nitrophenol and 2,3-acid production wastewater, is adsorbed by resin, not only can the COD of the effluent be reduced to about 200, but also the raw materials in the wastewater can be recovered, which has a certain economic value. This depends on your product and production process. Many wastewater cannot be treated with resin.
Chemical wastewater is difficult to treat due to its complex composition and good water solubility. It is certainly good to use physical and chemical methods to reduce COD and recover part of the organic matter. If it cannot be recycled, it is actually the transfer of pollutants, and the treatment of physical and chemical sludge is also a problem. Therefore, it is not important which method is used. What is important is how to treat it most thoroughly and most importantly.
Specific problems, specific analysis. The production process must be continuously optimized. This is the fundamental way. All problems cannot be solved at the end.
I am going to use a plate and frame filter press to pre-treat and filter the wastewater from chemical production. I don’t know how effective it is and how feasible it is. Can any friends who have used it share their experience?
We should consider more from the source, starting from process design and equipment selection, to reduce the emission of chemical substances.
But it still depends on what kind of wastewater it is. There is no unified treatment process, but the general idea is similar.
They are all talking about a general topic. The composition of chemical wastewater is complex. It does not talk about the specific type of chemical wastewater and how to treat it. There is no universal treatment process. The water quality must be analyzed in detail before talking about the process. Someone upstairs said it well. If it can be controlled during the chemical production process, do not concentrate all the pollution on the terminal treatment. This way, the treatment difficulty will be much less difficult and much easier to deal with.
I agree with the original poster’s point of view, give full play to physical and chemical means to remove toxic and harmful substances, and then use biochemical systems!
I agree to physicalize first and then regenerate. It depends on the content of toxic substances and the amount of water to compare the feasibility of various physical and chemical processes.
I think treating it from the source is the best way. If it can be controlled during the chemical production process, there should be no discharge or less discharge as much as possible, and the pollution should not be concentrated at the terminal for treatment. This will make subsequent treatment much less difficult and easier to deal with.
Source control is necessary, otherwise there will be serious waste. For chemical wastewater, there are too many types and different treatment methods. It is necessary to look at the food to eat. I have debugged a petrochemical wastewater. The water volume is small, only 300 cubic meters per day, and the COD is only about 400. This wastewater adopts the process of hydrolysis and contact oxidation after oil separation. The water output is good, the COD is around 50, and other indicators fully comply with the emission standards.
I support the practice of hugging the master, and you can do it. However, the production process should still be improved to support the control of pollutant emissions from the source.