Control requirements for wastewater generated from sodium-alkali flue gas desulfurization in catalytic cracking processes
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Which standards or specifications should be followed for the control of wastewater generated from sodium-alkali flue gas desulfurization in catalytic cracking processes? (e.g., control of COD in discharge devices) Thank you all in advance!
I’m not very familiar with it; let other experts come and answer it.
The parameters of our system are: pH value of 6–9, COD not exceeding 50 mg/l, suspended solids not exceeding 50 mg/l, and ammonia nitrogen not exceeding 3 mg/l (for SCR denitration).
There are likely no national standard requirements for this; it is probably a requirement stemming from the design or the company’s internal control policies.
The ammonia nitrogen level is so low; can it be kept under control?
Can the COD be kept at no more than 50 mg/l?
No problem. Oxidation is required to convert sodium sulfite into sodium sulfate.