FIELD: waste water treatment. SUBSTANCE: installation has casing in the form of two interconnected settlers with thin-layer modules thus forming double-section settler containing, between sections, heater-equipped oil product collector. First section encloses stream energy-damping chamber. Thin-layer plates form manifold to distribute stream on the inlet. Cover is provided with oil and fat catcher attached to it. Second section has variable-height discharge threshold. Installation can be applied in shipbuilding, mechanical engineering, petrochemical and petroleum processing industries as well as in construction, transport, power engineering, and other areas. EFFECT: increased treatment efficiency with waste waters containing both low- and high-viscosity petroleum derivatives. 4 cl, 4 dwg
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