Conventional activated ...
Published by Suresh Kumar.S
Conventional activated sludge plus advanced water technology like MBR,AOP[advanced oxidation]plus microfiltration and other pressure driven processes in vogue.
MBR plus Ultra filtration combo very common,followed by disinfection using chllorine.
Combinations with AOP like ozonation,hydrogen peroxide,as well as UV treatment in vogue.
The link below describes a typical case of municipal waste and sewage recycle for drinking