Denitrification with carbon addition--kinetic considerations.
The Blue Plains Advanced Wastewater Treatment Plant (Washington, D.C.) uses methanol as an external carbon source in a postdenitrification process, to achieve low effluent total nitrogen concentrations. This becomes more difficult in winter, at lower mixed liquor temperatures and higher flows, as a consequence of the kinetic behavior of the methanol-utilizing heterotrophs. The paper reports on an experimental batch test study conducted on Blue Plains postdenitrification sludge to investigate (1) the maximum specific growth rate of methanol-utilizing heterotrophs (Mu(METH)); (2) the temperature dependency of the growth rate; and (3) the efficacy of alternate substrates (ethanol, acetate, and sugar). A limited number of tests were conducted on sludge from two other treatment plants with methanol addition.
Dold
P
P
EnviroSim Associates Ltd., Flamborough, Ontario, Canada. dold@envirosim.com
Takács
I
I
Mokhayeri
Y
Y
Nichols
A
A
Hinojosa
J
J
Riffat
R
R
Bott
C
C
Bailey
W
W
Murthy
S
S
D000693:Anaerobiosis; D052836:Heterotrophic Processes; D020582:Hyphomicrobium / Q000254:growth & development / Q000378:metabolism*; D007700:Kinetics; D000432:Methanol / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism*; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*
D009584:Nitrogen; D000432:Methanol