Technical assistance: Biochemistry, high salt content
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This post was last edited by hesonchang214 on 2011-4-24 21:23. The influent water of our company’s biochemical system contains a relatively high level of salts, mainly iron ions, calcium ions, sulfate ions, etc. I would like to ask the experts: at what concentration does salt content have a significant impact on the growth and metabolism of microorganisms? Is there an empirical value?
High salt content can easily lead to scaling or corrosion; for example, an increase in calcium ions promotes scaling, while anions, especially sulfate and chloride ions, exacerbate corrosion. Therefore, there is a certain ion balance concentration required in the circulation system, which is why wastewater discharge is necessary.
You need to provide the ion concentration so that a reference can be given.
Firstly, what LZ mentioned is the high salt content, which is one aspect; another aspect is microorganisms. As we all know, microorganisms are quite special, and their requirements regarding the environment vary greatly. Regarding the concern expressed by the original poster, I suppose I can interpret it as the possibility that the increased salt content could cause the microorganisms to die due to dehydration. However, this requires you to provide information on the specific types of microorganisms present in your biochemical system. If it indeed is due to the salt content, it is recommended to carry out desalination treatment on the incoming water
I have read some papers before, including the experiments I conducted myself. Generally, a salt content of 4g/L requires careful consideration. The main problem is that the system has difficulty starting in water with high salt content. Of course, it’s also possible to use biochemical methods for water with a high salt content; the highest level of salt concentration for which such treatment has been used was 8 g/L. At even higher concentrations, it becomes very difficult to apply this method.