Requirements for salt content in biochemical wastewater treatment
Thread Content
Generally speaking, the salt content in the wastewater entering the aeration tank must be less than? What should be done if it’s not possible to enter the aeration tank?
This issue is indeed quite tricky, as I have been working with sewage for several years and have yet to come across any data that could serve as a reference. I think if the salt content is very high, it should be determined through laboratory pilot tests. If that doesn’t work, consider diluting the wastewater before carrying out biochemical treatment. Besides that, I think other methods would be more costly, such as evaporation or membrane technology.
Generally, the salt concentration in biochemical treatment using conventional activated sludge processes should not be too high, usually not exceeding 3 g/L. But now there are also salt-tolerant bacteria that can handle wastewater with a salt concentration of up to 30 g/L. If it exceeds this value further, biochemical treatment can only be used for dilution.
For biochemical units, a salt content of less than 0.5% should not pose any major problems