Operating tests on an integrated plant have been carried out in an
important oil company. The tests aim was to check the opportunity to
treat semi-oily wastewaters containing glycols by using reverse osmosis
preceded by a clariflocculation and deoiling treatment, for which
Technofluids owns the intellectual property.  During
the tests, the main operating parameters of the integrated plant have
been recorded and samples to be analysed have been collected after each
treatment phase.
The results confirmed that the analysed waste can be concentrated by
means of a two-stage reverse osmosis system, thus obtaining a fourfold
reduction of the initial volumes and producing effluents that can be
disposed of in the sewage system according to the current laws and/or
reused in other productive processes. However, this would only be
possible prior to a pre-treatment to remove oil substances, fats, iron,
manganese and, more generally, all non-soluble substances.
The estimated operating cost for an integrated plant treating 5,000
m3/year of waste - which was confirmed by the consumptions recorded
during the tests - is 4,8 euro/m3 of treated wastewater. This includes
power consumption, consumables and membrane washing products, but not
the reverse osmosis membrane replacement. This charge will only be
determined through full scale and long duration tests. |
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