Wastewater characteristics related to treatment processes
Wastewater characteristics related to treatment processes
Criteria to describe the characteristics Physical(SS, VSS, TSS..) Chemical (pH, Heayy metals P Biochemical (COD, BOD, TOC..) e Hygienic(Strain No of E. Coli,
Criteria to describe the characteristics Physical (SS, VSS, TSS…… ) Chemical (pH, Heavy metals…… ) Biochemical (COD, BOD, TOC…… ) Hygienic (Strain No of E. Coli, …… )
Understanding well the characteristics of wastewater to be treated is the first step towards a successful process design
Understanding well the characteristics of wastewater to be treated is the first step towards a successful process design
Constitution of influent cod Influent coD Biodegradable Unbiodegradable Biomass CoD COD COD Readily Slowly Soluble Particulate Biodegradable Biodegradable Unbiodegradable Unbiodegradable COD (SS) COD (XS COD(SD COD(X)
Influent COD Unbiodegradable COD Biodegradable COD Readily Biodegradable COD (SS) Biomass COD Slowly Biodegradable COD (XS) Soluble Unbiodegradable COD (SI) Particulate Unbiodegradable COD (XI) Constitution of Influent COD
Carbonaceous compounds behavior in biological activated sludge process e S, will pass through the treatment process and be discharged with the effluent X is enmeshed in the activated sludge. The mass of X entering the system will equal the mass leaving the system via activated sludge wasting. Thus, XI has the principal effect of increasing the mixed liquor suspended solid(Mlss)concentration e Ss is taken up by activated sludge in a matter of minutes and metabolized, giving rise to a high unit rate of oxygen demand for synthesis e Xs must first be absorbed onto the microorganisms, and broken down to simple chemical units(ss) by extracellular enzymes before finally being metabolized by the microorganisms 05/10/2002
Carbonaceous compounds behavior in biological activated sludge process SI will pass through the treatment process and be discharged with the effluent. XI is enmeshed in the activated sludge. The mass of XI entering the system will equal the mass leaving the system via activated sludge wasting. Thus, XI has the principal effect of increasing the mixed liquor suspended solid (MLSS) concentration. S S is taken up by activated sludge in a matter of minutes and metabolized, giving rise to a high unit rate of oxygen demand for synthesis. X S must first be absorbed onto the microorganisms, and broken down to simple chemical units (S S) by extracellular enzymes before finally being metabolized by the microorganisms. 05/10/2002