To reduce the high operation and maintenance expenditure by providing a more efficient aeration solution.
Membracons engineers calculated that replacing the liquid oxygen injectors would be the most economical solution as the operation and maintenance costs of the system were extremely high and
provided the most room for savings.
An FFBATM system was installed comprising of 4 floating aerators, 1
blower, air feeding pipes and manifold.
In order to provide the fine bubble membranes most suited to the
mill's aggressive wastewater, Membracon undertook preliminary tests on
a selection of materials. Four types of membranes were tested
(EPDM, Polyurethane, Silicone and PTFE) over a period of 3 months.
Upon completion of the tests and based on laboratory results, the
decision was made to use Polyurethane membranes for the project.
Having installed the Mapal aerators the mill operators were able to
inject less liquid oxygen into the wastewater and therefore reduced
their operational costs.
Membracons floating aeration system was installed within 3 days without
draining the lagoon or disabling the existing aeration equipment.
Membracon achieved a Standard Aeration Efficiency (SAE) of more than
3kg oxygen/kW.
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