For the sewage sludge with the sewage treatment plant, the most typical sludge involves Major and secondary sludge, where the main sludge will be the sludge collected from the key clarifier, and the secondary sludge could be the surplus-activated sludge (Nielsen and Stefanakis 2020). As to the onsite sanitation system, https://rapidsandfilters82468.collectblogs.com/74386536/a-secret-weapon-for-high-efficient-sedimentation-tank