I think by using Advance ...
Published by Nikul Maliya, Environment Executive Officer at Jagnath Lab Technologies GPCB Schedule II Auditor
I think by using Advance Oxidation Process (AOPs) we can treat the water without generation of sludge but the main drawback is it is a costly method. Research work is going on how to make it feasible and cheap so that we can use this Advance Oxidation Process. It is used in some countries