THE FACT ABOUT FINE BUBBLE DIFFUSER THAT NO ONE IS SUGGESTING

For the sewage sludge through the sewage treatment plant, the most common sludge incorporates Main and secondary sludge, in which the main sludge would be the sludge gathered from the key clarifier, and the secondary sludge will be the surplus-activated sludge (Nielsen and Stefanakis 2020). As for the onsite sanitation system, the sludge is called