Treatment solutions for high-salinity organic wastewater
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The organic wastewater discharged from indigo factories contains about 10% salts. What treatment methods can be used to ensure that the treated wastewater can be directly fed into the urban sewage treatment system? Experts, please offer your advice
Could you provide the specific components? I’d like everyone to discuss it together
Today, such water with high salt content can be treated using BAF, that is, aerated biological filters
It seems to be organic dye wastewater; generally, processes such as oxidation, aeration, and flocculation are used, but the specific approach depends on the composition of the wastewater in question
Simple water treatment is no longer sufficient; we need to rely on advanced technologies such as membrane treatment, electrodialysis, and thin-film evaporation. We must also recognize that biology is not omnipotent, as we have already changed the composition of the world.
Use membrane treatment; through membrane filtration, the salt is concentrated until the water quality becomes suitable for discharge.
What are the specific components? It would be even better if salt could be recycled; this would not only allow wastewater to be treated and environmental issues resolved, but it would also generate benefits for businesses.
We also have special strains that can be used with water for experiments to verify things.
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10# david-2: Oxidative decomposition by direct strong oxidants
Treatment of indigo wastewater with 10% salt content: It is recommended to use the microelectrolysis process, after which the wastewater can be directly discharged into the municipal sewage system； The salt content of the mixed wastewater is kept at around 1%, which facilitates good biochemical treatment.
With such high salt content, multi-effect evaporation is the only option.
Membrane treatment is no longer an option; firstly, the salt content is already very high. As the water is concentrated, its salinity increases further, and this concentrated water still cannot be discharged, so it doesn’t solve the actual problem. The investment costs for evaporation are extremely high, and it seems that such systems don’t exist in China yet. What I’ve seen in practice is that oxidation is used to remove organic substances before the water can be discharged in compliance with regulations!