348
T.E. Pollock and J.D. Norman
200
150
I 0 0 h
50
dCr = 0.263 CR -26.7
ENVELOPE OF 9 5 %
CONFIDENCE LEVEL OF
THE CORRELATION
200
400
: B 0
600
800
mg./l.
Fig. 6.
time knowing the influent and desired effluent organic concentration. During process
operation microorganisms would be removed from the system (wasted) so that the
practical maximum level is not exceeded.
This procedure assumes that organic wastes met in practice will exhibit similar removal
characteristics to the dextrose carbon source used in this investigation. Recent studies on
more complex wastes (Wilson (1967), Tischler and Eckenfelder (1968)) suggest that this
is a reasonable assumption. For waste streams consisting of a variety of organic wastes, it
would be necessary to determine if any mutual inhibition effects are present, in which
case it may be feasible to investigate separate treatment facilities for these compounds if
they originate from different sources or separation techniques if they originate from a
common source.
CONCLUSIONS
It is concluded that for the materials and methods of this investigation:
(1) The degree of dependence of specific growth rate on organic carbon is very
sensitive to the type of data treatment used for the organic carbon versus time plot.
(2) For the batch experiments of this investigation, reactor volumes (costs) of from 2 to
T.E. Pollock and J.D. Norman
200
150
I 0 0 h
50
dCr = 0.263 CR -26.7
ENVELOPE OF 9 5 %
CONFIDENCE LEVEL OF
THE CORRELATION
200
400
: B 0
600
800
mg./l.
Fig. 6.
time knowing the influent and desired effluent organic concentration. During process
operation microorganisms would be removed from the system (wasted) so that the
practical maximum level is not exceeded.
This procedure assumes that organic wastes met in practice will exhibit similar removal
characteristics to the dextrose carbon source used in this investigation. Recent studies on
more complex wastes (Wilson (1967), Tischler and Eckenfelder (1968)) suggest that this
is a reasonable assumption. For waste streams consisting of a variety of organic wastes, it
would be necessary to determine if any mutual inhibition effects are present, in which
case it may be feasible to investigate separate treatment facilities for these compounds if
they originate from different sources or separation techniques if they originate from a
common source.
CONCLUSIONS
It is concluded that for the materials and methods of this investigation:
(1) The degree of dependence of specific growth rate on organic carbon is very
sensitive to the type of data treatment used for the organic carbon versus time plot.
(2) For the batch experiments of this investigation, reactor volumes (costs) of from 2 to