If the solids concentration in a primary sludge is 4% and th… Post author By Anonymous Post date January 23, 2025 Related Posts:If the solids concentration in a primary sludge is…If the solids concentration in a primary sludge is…If the specific gravity of sludge is 1.03 at 5%… ← Chlorine is added to a water storage tank for disinfection…. → A 15 mL sample of wastewater was placed in a BOD bottle and…