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Improved waste management through automation can deliver
more efficient waste treatment, reduced energy and chemical consumption
and improved effluent quality. The cost of treatment and trade discharge
can thus be significantly reduced.
Progressively more and more companies are installing
instruments to monitor raw effluent and limit the load reaching
a balancing tank. Diverting peak loads can dramatically reduce the
strength of effluent needing primary treatment, resulting in a more
homogeneous waste that is simpler to treat. Consequently, discharge
consents are more easily maintained. TOC can monitor in real time
and divert peak organic loads, Turbidity can indicate the Suspended
Solids and pH is also frequently installed.
Biological treatment is extensively used to treat sewage
and industrial effluent, principally to remove ammonia and reduce
organic loading. Controlling aerobic and anaerobic digestion using
Dissolved Oxygen and Suspended Solids is extensively installed to
optimise treatment and regulate aeration - saving money. More recently,
determination of ammonia within the activated sludge has also been
shown to be beneficial.
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[PDF 262KB] Toxicity may affect aerobic and anaerobic systems.
Some sites receiving significant industrial effluent such as agrochemical
and metal plating waste, may be subjected to acute and chronic toxicity
inhibiting nitrification. Toxicity and TOC measurement at the inlet
to sewage works can be used to provide forward control and protect
the treatment process.
Total Nitrogen and Total Phosphate are parameters that
are likely to be introduced by the EA as consent parameters for
specific catchments in the very near future. As a consequence, treatment
may need to be upgraded to remove these nutrients and monitors installed
to efficiently control this treatment process.
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