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INDUSTRIAL PROCESSES
AND THE TREATMENT OF
WASTEWATER
1. DESCRIPTION OF TREATMENT TECHNIQUES
. treated prior to mixing with other
ORGANISATION contaminated wastewater.
Equally, where hydraulic and pollutant
OF SEWERS flows are too variable, they are regulated
AND SYSTEMS by:
- storm tanks, placed in a by-pass
anisation of sewers and systems configuration for storing first-stage polluted
is closely related to the different types of water. Recovering this low-flow water and
industry and, as a result, a whole array of then channelling it towards purification
configurations exist. In all cases, it is means that treatment is not oversized,
essential to avoid unnecessary dilution - homogenisation tanks designed to store
during treatment. The following principles all effluents produced by a unit or entire
must be carefully followed: facility for a few hours, or even a few days.
- cooling water, if not treated in an open These tanks are fitted with mixing units.
recirculating system, and non-polluted rain Their function is to clip pollution peaks and
water are discarded in separate systems, enable, to a certain extent, programming of
the treatment process,
- waste process waters presenting high
toxic concentrations or specific pollutants - safety tanks left empty and designed to
are collected separ