Generally, the mature process at this stage is the AO process, that is, the Bardorf process or an improved version, or SBR. However, small treatment plants now also use the BAF process. Each of these processes has its own characteristics. I really don’t know much about the current method of removing sulfate by mud method, but I am considering whether it is sulfate radicals or sulfur in hydrogen sulfide. If it is the former, there will be no problem in entering the biochemical treatment system. The only consideration is scaling. If the concentration is very high, you can consider adding calcium oxide before the system and adding neutralizing reagent later. If it is not high, the biological sludge method can handle it. If it is the latter, the biochemical treatment will be very difficult. If it is less than 5PPM, it seems that There are cases of successful treatment, but I can't remember the details. If it is higher than 10PPM, chemical precipitation should be used to precipitate it out in advance, and it can be removed by air flotation equipment before entering the system.
If only the NH3-N is high, there is no big problem. If you add some organic matter, you can choose the above two processes. You can check the specific advantages and disadvantages, but relatively speaking, the AO process is more suitable. Higher ammonia nitrogen wastewater has better effluent quality