Problem 1
Estimate the amount of influent nitrogen which will end up being
consumed by the `organotrophic' (i.e., CBOD consuming) fraction
of the MLVSS.
Problem 2
Estimate the relative distribution of `organotrophs' and `nitrfiers'
in this same MLVSS (% organotrophs versus % nitrifiers).
Problem 3
Would this system likely have enough aeration horsepower
(in terms of oxygen supply, not mixing intensity) if
the available diffuser system were known to be capable of
transfering 2.8 lbs oxygen per HP per hour (at maximal gradient).
Problem 4
Estimate the amount of alkalinity likely to be `consumed' by
nitrification of the ammonium-nitrogen (after `organotrophic
uptake for anabolism).
Problem 5
If this City were to add a subsequent `denitrification' reactor system,
which would then need a supplemental addition of organic carbon
to metabolically `drive' this reaction, how much methanol [answer in gallons
per day!] would be
needed (assuming this was the selected form of organic carbon).
Problem 6
In lieu of installing the
latter `post-denitrification' system,
suppose that one-half of this existing single stage
reactor was to be converted to an anoxic condition, and
that an internal recycle of `8Q' was to be installed
to facilitate an `MLE' flowscheme.
Would the remaining `aerobic' reactor volume still
be able to nitrify this wastewater's reduced nitrogen?
Problem 7
Roughly estimate what fraction of the incoming `fixed' nitrogen
(i.e., organic + ammonia + ammonium) could be removed using
this latter design scheme (with removal including both
organotrophic assimilation plus combined nitrification-denitrification).
Last Modified: 2 November 1996; alleman@ce.ecn.purdue.edu