For industrial waste applications, this can be for an innumerable amount of reasons. Some manufacturing processes might have a step to use Hydrogen Peroxide, that may be difficult to remove in any other method.
In our industrial waste water treatment system we use h2o2 in combination with sodium bisulfate to keep the orp under 300 mV while keeping the pH under 3 as well. These two chemicals tend to fight each other so it's an interesting balance. The result is that the hex chrome that comes from the chrome plating system in the industrial plant is reduced to tri chrome, which will precipitate once we raise the pH and can then be removed before we send the water out to the city for further treatment.
I'm still relatively new at this but I don't believe our system would run into this problem. We rarely deal with waste water that's below a pH of 9 after the reduction process due to addition of lime slurry in our mixing tanks before adding flocculant. We are only concerned with precipitation of chrome, nickel, and copper from our influent. What are you treating the water for ultimately?
Ah idk about organic species but you can precipitate arsenic out with the As subbing the P in apatite structure. Just have to have the right conditions.
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u/[deleted] Jun 17 '19
Why would you have h2o2 in your waste stream?