Many sewage treatment plants now require Class A water effluent. Do you have any good ideas?
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Nowadays, many municipal water plants and park water plants are required to achieve Level A. I wonder if you have any good methods? Give an example: Incoming water COD 500, BOD 130, SS 400, PH 6~9, TN100, TP10. Haha, do you have any good methods for treating such wastewater in COD, BOD, TN, and TP? Feel free to discuss, I hope experts can give more advice.
It is estimated that TP will all use chemical phosphorus removal, which should be no problem. It is still quite difficult for any biological method to deal with such a high TP, and chemical methods should be a guaranteed method. TN will probably replenish the carbon source due to the influence of C/N. The more troublesome thing is COD.
If the biochemical properties of the wastewater are good, a mud film system can be constructed in the biochemical tank to improve the treatment effect. Concrete results need to be tested, especially with wastewater from industrial areas.
The quality of the incoming water of the poster is not good, and the biochemical properties are too poor. It is difficult to directly use biochemical methods to meet the first-level standards. Of course, I don’t know how much the COD will be reduced after pretreatment before biochemical treatment, such as air flotation or coagulation, to remove SS due to high SS. It needs to be tested before determining the plan. Many urban sewage plants used to be designed based on effluent COD60, but now they are required to meet the standard of 50%, which is a bit difficult. Of course, after transformation, it should not be a problem for domestic sewage, but it will be difficult for industrial wastewater.
Haha The problem is that many ZFGYs don’t care what they do. They just want results and don’t pay attention to whether it is economically and practically feasible. To give a simple example, we originally worked on a project with a design capacity of 50,000 tons, but the actual water intake was less than a few thousand tons, making it difficult to cultivate microorganisms. But some GYs say that if you can’t even eat a few thousand from your 50,000-ton tank, then there’s something wrong with your craftsmanship. Why......
The current process is: Regulation - hydrolysis and acidification - aerobic treatment - secondary sedimentation tank - drainage. The water output is around COD150. We are now planning to do some small experiments and use chemical methods to reduce the COD. I will let you know if there is any effect. Haha, is there something wrong with my organizational language? I see that there aren’t many discussions.
What kind of water is this? The B/C is so low. It turns out that the process is too bad. Only 70% of the COD is removed. MBR has a very high removal rate of nitrogen. If phosphorus wants to reach the A standard, it can only be added.
C Use biochemical dosing, or strengthen the aerobic N loading carrier to strengthen nitrification, TN to strengthen denitrification, and add an external carbon source TP when there is a carbon shortage. Chemically strengthened auxiliary organisms are difficult to handle for sewage that occupies a large amount of chemical and pharmaceutical industrial wastewater.