Regarding your case you has to reduce your COD 90%, for this target is necessary get know the source of this Waste water and What is your flow?, probably you need to do jar test and maybe your solution just need DAF system.
Published by Raul Ulfe
Regarding your case you has to reduce your COD 90%, for this target is necessary get know the source of this Waste water and What is your flow?, probably you need to do jar test and maybe your solution just need DAF system.