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Table 4

Performance of the biodigester for removal of key environmental contaminants

Performance parameterInOutExpected design efficiency (%)Actual biodigester efficiency (%)
BOD5 (mg/L) 960 ± 159 320 ± 27 71.7 66.7 
(mg/L) 4,032 ± 624 1,312 ± 86 78 67.5 
TSS (mg/L) 10,100 ± 428 2,860 ± 104 60.1 71.7 
(mg/L) 189 ± 14 550 ± 18 −145 −191.0 
NH3 (mg/L) 570 ± 85 315 ± 58 32.0 44.7 
(mg/L) 307.5 ± 9.5 82.9 ± 10.7 70.9 73.0 
Fecal coliforms (CFU/100 mL) 37,667 ± 1,058 19,333 ± 482 45.2 48.7 
Turbidity (NTU) 17,600 ± 373 4,020 ± 144 70.5 77.2 
Alkalinity as CaCO3 (mg/L) 76.8 ± 2.7 66.4 ± 2.8 17.2 13.5 
VFAs as acetic acid (mg/L) 9.7 ± 0.26 22.7 ± 1.9 13.8 −133.5 
Performance parameterInOutExpected design efficiency (%)Actual biodigester efficiency (%)
BOD5 (mg/L) 960 ± 159 320 ± 27 71.7 66.7 
(mg/L) 4,032 ± 624 1,312 ± 86 78 67.5 
TSS (mg/L) 10,100 ± 428 2,860 ± 104 60.1 71.7 
(mg/L) 189 ± 14 550 ± 18 −145 −191.0 
NH3 (mg/L) 570 ± 85 315 ± 58 32.0 44.7 
(mg/L) 307.5 ± 9.5 82.9 ± 10.7 70.9 73.0 
Fecal coliforms (CFU/100 mL) 37,667 ± 1,058 19,333 ± 482 45.2 48.7 
Turbidity (NTU) 17,600 ± 373 4,020 ± 144 70.5 77.2 
Alkalinity as CaCO3 (mg/L) 76.8 ± 2.7 66.4 ± 2.8 17.2 13.5 
VFAs as acetic acid (mg/L) 9.7 ± 0.26 22.7 ± 1.9 13.8 −133.5 
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