Technical assistance: Biological treatment of high-salt wastewater
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This post was last edited by hesonchang214 on 2009-9-28 09:04. Our factory has wastewater with a salt content of 15%, which contains cyanide, ammonia nitrogen, organic substances, etc. Does anyone know if going down the path of biological treatment will work? Please help me. Note: Bacterial culture was successful, but it seems not to be working
Biochemical methods definitely won’t work; use multi-effect evaporation instead! Remember to recycle industrial salt!
This type of wastewater is primarily characterized by a high salt content; cyanides and organic substances (those that are not special or difficult to degrade) can be treated using biological methods, oxidation methods, or other approaches. Too high a salt content primarily inhibits and poisons microorganisms, and this is related to osmotic pressure. There are reports in magazines on the targeted selection of microorganisms capable of handling high salinity levels, but large-scale applications are still rare. I agree with what was said above; however, cyanides and organic substances should be removed first before multi-effect evaporation.
Desalination first, then biochemistry. How about first carrying out chemical oxidation to remove organic matter, etc., and then desalination?
Theoretically, it is completely feasible, but its practical application is still limited at present. If this approach can be made to work, it would be groundbreaking, and I personally still recommend pursuing it. Also, your water has too high a toxicity level; if it were less toxic, things might be better.
Multi-effect evaporation might have relatively high costs, and I’m not very familiar with biological treatment either； A salt content of 15% is quite high; if it has value, it’s better to recycle it ； How about this: I’ll leave an email address at sdrsdr@126.com – let’s see if our MVR system can help you solve this problem.
Solving this problem would be a breakthrough; biochemical methods present difficulties, and oxidation for COD removal seems to yield only average results. Evaporation requires more energy, but it might be feasible in some cases. Has anyone tried electrolysis before?
Reply to 7# zhengqi: We have also tried electrolysis, but the results were not satisfactory.
Reply to 2# 594913067: We have demonstrated that evaporation involves high costs and significant energy consumption, resulting in substantial losses； And preprocessing is necessary.
The strain you’ve cultivated doesn’t seem to work; keep cultivating it
Has the original poster resolved their issue? If needed, please get in touch with me further