Treatment of organic waste sulfuric acid with high COD
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I would like to ask for advice: Our company generates waste sulfuric acid with a COD level as high as 1 million units, where the organic compound present is mainly propylene glycol, and the sulfuric acid concentration is around 5% to 10%. Are there any experts with experience in dealing with such waste? (If burned, the salt content is too high; if discharged into the water system, high COD levels can affect the stability of the system.)
This difficulty is indeed very high; the key issue is that your acid concentration is only 10%, and the process of cracking is too costly
Yes, we still haven’t found a suitable solution
If it really needs to be processed, it is recommended to concentrate it first and then carry out pyrolysis; the cost is very high
If the sodium salt content is high, concentrating it first and then carrying out cracking won’t work either, as sodium salts easily cause blockages
It might be simple: just change the process so that sulfuric acid is not used as a catalyst (regardless of the technology or product)
Can reverse osmosis be used for concentration and separation, to separate out the sodium salts as well, and then carry out cracking?