Oil-Water Separators

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Oil-water separator suppliers design and manufacture systems that remove free and dispersed hydrocarbons from wastewater before discharge or further treatment, typically using gravity separation or coalescing technology. The suppliers below serve industrial, automotive, and petrochemical applications across Europe.

  • Western & Central Europe
  • Northern Europe & Baltics
  • Southern Europe
  • Eastern Europe
  • Ireland & Northern Ireland
  • EEA (Non-EU)
  • DACH Region
  • Western Europe
  • Northern Europe & Baltics
  • Central & Eastern Europe
  • Southern Europe
  • Nearshore Markets (Non-EEA)
  • Global Sourcing
  • Other
  • Core Certifications & Sustainability Proofs
  • Supplier Conduct & Compliance Documents
  • Industry-Specific Quality & Compliance Standards
  • Health, Safety & Social Compliance Standards
  • Cybersecurity & Information Security Standards
  • Global Quality & Compliance Standards
  • EU Market Compliance & Safety Standards
  • Sustainable Product Certifications
  • Export Compliance & Product Safety Standards
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    What Oil-Water Separators suppliers provide

    Suppliers in this category cover gravity separators, coalescing separators, and compact packaged units that remove oil and hydrocarbons from wastewater streams. Typical applications include vehicle washing facilities, workshops, petrol stations, industrial process water, and stormwater from paved areas at risk of hydrocarbon contamination. Core competence lies in matching separator size and technology to flow rate, oil concentration, and droplet size distribution in the incoming water. Many suppliers also provide installation guidance, sludge and oil removal services, and maintenance contracts. Distinguish this category from Grease Separators, which target fats and greases from food-service wastewater rather than mineral or synthetic oils, and from Industrial Separators, which cover a broader range of process contaminants beyond hydrocarbons.

    Relevant standards

    Oil-water separators are commonly designed following the American Petroleum Institute (API) separator principle for gravity-based hydrocarbon removal, alongside coalescing plate technology for finer droplet sizes. Discharge limits typically reference national implementations of EU water protection requirements. Supplier quality and environmental management is typically certified to ISO 9001 and ISO 14001.

    Frequently asked questions

    What is the difference between an oil-water separator and a grease separator?
    An oil-water separator removes mineral and synthetic oils, typically from industrial or vehicle-related wastewater. A grease separator removes fats, oils, and greases from food-service wastewater, a different contamination profile requiring different separation technology.

    How does an oil-water separator work?
    Most systems rely on gravity separation, sometimes combined with coalescing plates, to let oil droplets rise and be skimmed off before the water continues to discharge or further treatment.