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Table 1

Mean (n = 20, ±S.D.) physico-chemical characteristics of municipal wastewater and landfill leachate

ParametersMunicipal wastewaterLandfill leachateIndian Standards for Treated Wastewater Discharge
pH 7 ± 0.3 7.9 ± 0.4 6.5–9.0 
EC (mS/cm) 0.7 ± 0.2 9 ± 2 – 
TDS (mg/L) 470 ± 40 6,900 ± 2,000 – 
TSS (mg/L) 450 ± 35 6,800 ± 2,500 100 
BOD (mg/L) 260 ± 80 80 ± 40 30 
COD (mg/L) 460 ± 90 4,600 ± 1,800 250 
Ammonia (mg/L) 45 ± 2 310 ± 100 50 
Nitrate (mg/L) 35 ± 7 10 
Phosphate (mg/L) 10 ± 2 50 ± 35 
BOD/COD ratio 0.6 0.02 – 
ParametersMunicipal wastewaterLandfill leachateIndian Standards for Treated Wastewater Discharge
pH 7 ± 0.3 7.9 ± 0.4 6.5–9.0 
EC (mS/cm) 0.7 ± 0.2 9 ± 2 – 
TDS (mg/L) 470 ± 40 6,900 ± 2,000 – 
TSS (mg/L) 450 ± 35 6,800 ± 2,500 100 
BOD (mg/L) 260 ± 80 80 ± 40 30 
COD (mg/L) 460 ± 90 4,600 ± 1,800 250 
Ammonia (mg/L) 45 ± 2 310 ± 100 50 
Nitrate (mg/L) 35 ± 7 10 
Phosphate (mg/L) 10 ± 2 50 ± 35 
BOD/COD ratio 0.6 0.02 – 
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