Reduce COD in wastewater?
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The parameters of the existing wastewater are as follows: COD: around 20,000 ppm, ammonia nitrogen: around 20,000 ppm, pH
Approach: Flash distillation, distillation, biochemical method
This post was last edited by liu530014416 on 2022-9-13 09:35: high-temperature and high-pressure pyrolysis, biochemical treatment of the wastewater generated after pyrolysis, and incineration of the waste gases.
“No new impurities can be added! ”It is best to remove them through physical adsorption; for example, resin adsorption can be used to remove COD as well as other organic substances
Evaporation: Since you’re made of organic molecules with large molecular structures, relatively little of it should evaporate and end up in the distilled water; as a result, the pH decreases and less ammonia nitrogen is evaporated
If only COD is to be treated, it can be neutralized first, followed by flocculation using polyacrylamide and polyaluminum chloride, and then COD can be removed through air flotation. Afterwards, the use of activated carbon or walnuts for filtration can further improve the efficiency of COD removal
Two technologies can be considered: 1. Catalytic wet oxidation, which converts the organic substances containing COD into non-toxic and harmless gases such as N2 and CO2； 2. Oxygen-adjacent pyrolysis: First, the wastewater is concentrated to a certain COD level; then the concentrated water is atomized using air, and it is fed into the oxygen-adjacent pyrolysis device, where the organic substances are converted into non-toxic and harmless gases such as N2 and CO2. Feel free to contact if interested.
Is the current COD at a saturated level? If it is, the COD in the water can be reduced by lowering the temperature