Energy Conservation in Aerobic Wastewater Treatment Units - Implementing Environmental and Resource Management - page 40

tion chamber. The most favourable nutrient (nitrogen and phosphorus) removal
was between 1.7 and 48.5% at influent loading of 36.3 mg/L N, and between 23.7
and 40.0% at influent loading of 5.9 mg/L P. The results from the modification
experiment showed significant improvement of the existed system. This means
that, it is not worth operating the aerators for 24 hours per day. Instead, operating
it for 12 hours per day is more efficient since there is an appreciable amount of
energy saved.
To find out the performance characteristics of the BioMax ATU after cutting
down its energy use, one could clearly observe that, in terms of energy conserva-
tion, the modification experiment was able to cut down the energy consumption
by 50% of the original supply of 2.38 kW.h/day. Despite this energy reduction,
there was also an appreciable increase in the nutrient removal performance effi-
ciency of the BioMax ATUs. This however, achieved monetary savings of
$0.1656 per day. This is a clear indication of an improvement to the existed sys-
tem. Considering the differences in volume and quality of the wastewater flow
into the BioMax C10 systems and the standard domestic installation type, one
cannot generalise the above conclusion to be the same for all, hence the need to
calculate the total flow to be able to estimate the effluent load depending on the
flow rate of each size of the BioMax system. On the other hand the same experi-
ment can be conducted for the different sizes of the BioMax Systems.
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