One application
of the concepts of
redox reactions in daily life is in the field
of waste treatment. The basic principle used is
the oxidation of organic and inorganicmaterials,making it
easier to be further processed.Waste is one of the environmental pollutants .We have to think how to overcome them.To maintain and to prevent environmental contamination due
to the accumulation of waste is increasing, many efforts have
been carried out to obtain a précis and and efficient
technique according to
the local conditions.
Various types
of liquid waste treatment by
involving microorganisms has been done in
Indonesia, namely sedimentation, oxidation ponds, trickling filters, activated
sludge (activated sludge), and septic tanks. On this
description we will learn only one technique
the technique of activated sludge (activated sludge).
Activated
sludge process (activated sludge) is
a system that is widely used for aerobic liquid waste treatment. Activated
sludge is the most effective method to remove us spended and
dissolved materials from the liquid waste.Once the liquid
waste settling insedimentation
tanks, sewage flowed into the aeration tank where
the heterotrophic bacteria rapidly growing.
The
bacterias
are activated by the flow of
air(oxygen) to perform the oxidation of organic
materials. Bacterias that
are active in the
aeration tank is Escherichia coli, Enterobacter,
Sphaerotilus natans, Beggatoa,Achromobacter, Flavobacterium,and Pseudomonas. These bacteria form clumps or flocs. The floating blobs are thenfloated on
the surface of waste.
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