For the sewage sludge in the sewage treatment plant, the most common sludge consists of primary and secondary sludge, where the main sludge would be the sludge gathered from the first clarifier, along with the secondary sludge is the surplus-activated sludge (Nielsen and Stefanakis 2020). As to the onsite sanitation https://lamella-tube14680.madmouseblog.com/9288410/detailed-notes-on-anion-exchange-resin-tower