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Mixed liquor samples were obtained and analyzed for COD, mixed liquor suspended solids (MLSS) and mixed liquor volatile suspended solids (MLVSS) after each DWP and off gas measurements using the Hach kits method. Other operating parameters, i.e., DO, influent volumetric flow, blower temperature and pressure were also measured. A summary of the pilot reactor operating conditions and average wastewater characteristics, based on samples analysis during each off gas and DWP measurement is reported in (Table 1).

Table 1

Summary of pilot operational and process condition over the test period

ParametersUnitAverage values
Total influent COD mg/L 7,925 ± 1,349 
Organic loading rate kgCOD/m3 day 217 ± 40 
MLSS mg/L 6,247 ± 1,676 
MLVSS mg/L 5,236 ± 1,453 
NH3 mg/L 17 ± 3 
NO2 mg/L 0.026 ± 0.003 
NO3 mg/L 0.45 ± 0.1 
DO mg/L 0.11 ± 0.08 
pH – 6.78 
HRT min 20 ± 0.4 
Standardized air flow m3/hr 5, 10, 13 
Average volumetric flow L/min 3,028 ± 110 
Temperature °C 21 ± 4 
Duration months 17 
ParametersUnitAverage values
Total influent COD mg/L 7,925 ± 1,349 
Organic loading rate kgCOD/m3 day 217 ± 40 
MLSS mg/L 6,247 ± 1,676 
MLVSS mg/L 5,236 ± 1,453 
NH3 mg/L 17 ± 3 
NO2 mg/L 0.026 ± 0.003 
NO3 mg/L 0.45 ± 0.1 
DO mg/L 0.11 ± 0.08 
pH – 6.78 
HRT min 20 ± 0.4 
Standardized air flow m3/hr 5, 10, 13 
Average volumetric flow L/min 3,028 ± 110 
Temperature °C 21 ± 4 
Duration months 17 

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