As you know biological ...
Published by Arturo Constante, Wastewater Purification - Zero Emissions
As you know biological treatment process is very unstable and its reliability in the best of the cases is not higher than 65%.
pH and temp are key factors with direct influence in water treatment but most in wastewater, so are missing more data to supply.
I suggest you our ionic process with reliability is ~95% to solve since root your problem which doesn't have critical parameters from pH neither temp while saving money.