CRITERIA TO ASSESS THE OPERATION OF ANAER OBIC PURIFICATION INSTALLATIONS FOR SACCHARIDE-CONTAINING WASTE-WATER .2. SPECIAL CONSIDERATION OF THE METHANE STAGE
S. Frenzel et W. Mauch, CRITERIA TO ASSESS THE OPERATION OF ANAER OBIC PURIFICATION INSTALLATIONS FOR SACCHARIDE-CONTAINING WASTE-WATER .2. SPECIAL CONSIDERATION OF THE METHANE STAGE, Zuckerindustrie, 121(2), 1996, pp. 91-99
Optimization of the anaerobic degradation processiIn sugar factory ana
erobic installations presupposes the well-coordinated separation of th
e acidification stage (including hydrolysis) and the methane stage, re
sulting in the optimal operating points for both degradation stages. I
n practice, the process stages acidification and methanogenesis can ne
ver be totally separated. Operating conditions may give rise to a situ
ation in which methane is already being generated in the acidification
stage or in which acidification is incomplete and unacidified compoun
ds introduced into the methane stage must be acidified in that phase.
The optimal point of the acidification stage was discussed in the firs
t part of this paper (Zuckerind. 120 (1995) 400-406). This second part
demonstrates the possibilities, by way of determining the contents of
specific coenzymes in the undifferentiated biomass of the methane sta
ge, of describing the composition of acidifying and methanizing bacter
ia of this mixed population. This made it possible to determine the qu
alities of inoculation mud and to observe the adaptation processes of
the inoculation mud employed in anaerobic reactors. Analyses of the co
enzyme F-420 content in the biomass of anaerobic muds from sugar facto
ry waste water reactors showed, after sufficient adaptation time, a co
enzyme F-420 content of 213-258 nmol/g organic dry substance.