L15_Wastewater_Organic_Matter_and_BOD

L15_Wastewater_Organic_Matter_and_BOD -...

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    Introduction to Wastewater  Treatment EVEG 3110
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    Cuyahoga River and Lake Erie Lake Erie Sediment, animal manure,  pesticides, fertilizers 155 tons/d of toxic chem.,  solvents, oil and sludge Akron: raw or  inadequately treated sewage Cleveland: raw or  inadequately treated sewage
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    Wastewater Composition - Physical Pollutant Conc. (mg/L) Total Suspended Solids (TSS) 220 Volatile (VSS) 165 Fixed (FSS) 55 Total Dissolved Solids (TDS) 500 Volatile (VDS) 200 Fixed (FDS) 300 Grease 100 Temperature 10 - 25 o C Color Grey (fresh) - Black (old) (Metcalf & Eddy, 1991)
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    Wastewater Composition - Chemical Pollutant Conc. (mg/L) BOD 5 220 COD 500 TOC 160 Total N-N 40 Organic N-N 15 Free ammonia N-N (TAN) 25 Nitrite-N &Nitrates-N 0 Total P-P 8 Organic -P 3 Inorganic P-P 5 Alkalinity (as CaCO 3 ) 100 (Metcalf & Eddy, 1991)
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    Wastewater Composition -  Biological Pollutant Conc. (mg/L) Total coliforms 10 8 - 10 9 MPN/L Fecal coliforms 10 7 - 10 8 MPN/L Non-fecal coliforms 9x10 7 - 9x10 8 MPN/L Total viruses 1,000-10,0000 infectious units/L
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    Effects of Pollutants Oxygen depletion septic conditions change in biota destruction of certain species Malformations, tumors, biomagnification Restrictions on fish consumption Accumulation in sediments (benthic organisms) more turbid waters loss of habitats clog fish gills change in biota Beach closings
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    Contaminants Removed During  Wastewater Treatment Sand, grit, debris Suspended particles BOD - organic matter Odor, color Bacteria, viruses, protozoan parasites Ammonia, nitrate Phosphate Specific chemicals
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L15_Wastewater_Organic_Matter_and_BOD -...

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