Performance of a commercial inoculum for the aerobic biodegradation of a high fat content dairy wastewater.
The effectiveness of a commercial inoculum for degrading a dairy wastewater with high fat content was evaluated, and compared with an activated sludge inoculum from a dairy wastewater treatment pond. Both inocula reached similar chemical oxygen demand removal in batch experiments. The population dynamics was also studied by determining heterotrophic counts. Predominant microorganisms were differentiated by colony morphology and genomic fingerprinting (BOX-PCR) analysis. The higher population diversity and the wider range of CO2 production rate observed in batch reactors inoculated with activated-sludge, indicated that microorganisms from this inoculum were well adapted and may have had synergic activity for the degradation of the dairy effluent. When the bioreactor was operated with the commercial inoculum in continuous mode, according to its microbial growth kinetics, other microorganisms became predominant. These results showed that inoculated microorganisms did not persist in the open system and periodic addition of microorganisms may be needed to achieve a high performance treatment.
Loperena
Lyliam
L
Dept. Bioingeniería, Instituto de Ingeniería Química, Facultad de Ingeniería, Universidad de la República, J. Herrera y Reissig 565, 11300, Montevideo, Uruguay.
Ferrari
Mario Daniel
MD
Saravia
Verónica
V
Murro
Daiman
D
Lima
Cynthia
C
Ferrando
Lucía
L
Fernández
Ana
A
Lareo
Claudia
C
D000818:Animals; D001420:Bacteria, Aerobic / Q000166:cytology / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology; D002417:Cattle; D005223:Fats / Q000032:analysis / Q000378:metabolism*; D007220:Industrial Waste / Q000032:analysis; D008954:Models, Biological; D014865:Waste Disposal, Fluid / Q000379:methods*; D014873:Water Pollutants / Q000737:chemistry / Q000378:metabolism*; D018508:Water Purification / Q000379:methods
D005223:Fats; D007220:Industrial Waste; D014873:Water Pollutants