CVG 2132 Lecture 6: Enhanced_primary Revised 2015
15 Mar 2017
School
Department
Course
Professor
Document Summary
Primary sedimentation basins are large basins that create quiescent conditions and allows some of the total suspended solids to settle to the bottom of the tank forming a concentrated solution called sludge. The majority of the incoming wastewater exits the tank as a more dilute (it contains less tss than the influent). A primary wastewater treatment plant treats 4000m3/d which has an influent suspended solids concentration of 150 g tss/m3. The sedimentation tank removes 50% of the influent tss and produces a sludge which contains 5% tss and has a density of 1,025 kg/m3. Find : you are asked to calculate the mass and volume of sludge produced by this plant, calculate the effluent volumetric flowrate and the effluent tss concentration. Clarifiers are separation processes so there are no reactions involved. Part a: the influent mass flow of suspended solids (infss) equals: 600 kgtss d: the mass of tss removed per day without using chemicals (ssremw/o chem):
