APPLICATION SYSTEMS ENGINEERING
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WASTE WATER TREATMENT
Wastewaters normally
contain large floating debris, which must be screened out and
other suspended solid materials and oils to be eliminated by
chemical additives in the Primary Treatment phase.
Aeration (bubbling air) through the water releases
dissolved gases to the atmosphere.
After primary treatment, the wastewater is directed to
the Secondary Treatment phase.
Secondary Treatment is used to lower the organic load of
soluted organic compounds, either in an aerobic (aerated) or
anaerobic (oxygen-free) condition.
Organic load is normally measured by BOD (Biochemical
Oxygen Demand) or TOC (Total Organic Carbon).
Settling of small suspended solids, not eliminated in the
Primary Treatment phase, occurs, as will the formation of
Sludge, caused by biological/biochemical digestion of the
organics in the wastewater.
Sludge & Scum (floating matter) are removed prior to the
wastewater being directed to a Tertiary System, if used.
Tertiary Treatment may consist of a variety of
means to finely filter the water prior to the water Disinfection
stage to kill the bacteria and release of the treated Final
Effluent to the environment.
During the past
number of years, wastewater treatment has become sophisticated,
employing various efficient treatment strategies, which require
advanced instrumentation to monitor & control such processes as
Nitrification/Denitrification, Phosphate removal,
Alkalinity, Sludge Treatment & Analysis prior to
disposal, & other analytes required by the application.
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