Estimation of (C/N) ratio for microbial denitrification.
Elemental balances of microbial growth have been applied to calculate (C/N) ratio in a denitrification process. The correlation between biomass yield coefficient and degree of reduction has been used to estimate the critical (C/N) ratio. It has been shown that when the degree of reduction of the substrate is lower than 4.67, the critical value of (COD/N) is almost constant and equals 7.6 g O2 g(-1) N. The batch cultures of denitrifying bacteria Ervinia sp. on glucose, sodium acetate and methanol have been used to verify theoretical relations. The results of experiments generally agree with theoretical considerations.
Sobieszuk
P
P
Warsaw University of Technology, Faculty of Chemical and Process Engineering, Warynskiego 1, 00-645 Warsaw, Poland.
Szewczyk
K W
KW
D001419:Bacteria / Q000302:isolation & purification / Q000378:metabolism; D019149:Bioreactors; D002244:Carbon / Q000032:analysis / Q000378:metabolism*; D005947:Glucose / Q000378:metabolism; D000432:Methanol / Q000378:metabolism; D009566:Nitrates / Q000737:chemistry / Q000378:metabolism*; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism*; D019346:Sodium Acetate / Q000378:metabolism; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000378:metabolism*
D009566:Nitrates; D014874:Water Pollutants, Chemical; D019346:Sodium Acetate; D002244:Carbon; D005947:Glucose; D009584:Nitrogen; D000432:Methanol