What is Oil Removal Systems and how does it work?

Oil Removal Systems is an engineered water or wastewater treatment process selected to achieve a defined quality, recovery or discharge objective. Its operating principle and treatment stages depend on the application.

What contaminants or water-quality problems can Oil Removal Systems address?

Performance depends on the selected configuration. Water analysis is used to identify suspended solids, dissolved salts, hardness, oil, organics, nutrients, metals or other parameters that the treatment train must control.

How is a Oil Removal Systems system designed and sized?

Design uses flow and load profiles, laboratory analysis, target outlet quality, recovery, operating hours, redundancy, footprint, utilities, sludge or concentrate handling and lifecycle cost.

How much does Oil Removal Systems cost in Singapore?

Cost depends on capacity, feed quality, materials, automation, civil and installation scope, performance requirements and ongoing consumables. A site-specific assessment is needed for a reliable budget.

Can World Technologies upgrade or maintain Oil Removal Systems?

Yes. World Technologies can review existing performance and support suitable upgrades, equipment replacement, commissioning, troubleshooting, consumables and preventive maintenance.

Oil Removal Systems | World Technologies

Industrial oily wastewater treatment

Oil Removal Systems

World Technologies designs integrated oil–water separation systems that combine oil skimmers, Corrugated Plate Interceptors (CPI) and Dissolved Air Flotation (DAF) to match the oil form, solids loading and discharge or reuse objective of each facility.

Our solutions support industries including oil and gas, petrochemicals, power generation, oleochemicals, food and beverage, distilleries, pharmaceuticals, manufacturing, marine facilities and vehicle or equipment washing. Each system is engineered around actual wastewater characteristics, available footprint and operating requirements.

Industrial wastewater facility requiring an engineered oil removal system

Recover floating free oil

Separate oil and settleable solids

Remove dispersed oil and flocs

Prepare water for discharge or reuse

How the Combined Oil Removal Process Works

A staged treatment train prevents one unit from carrying the entire contaminant load. The exact sequence is selected after wastewater testing and may include equalisation, pH adjustment or chemical conditioning.

1Collection & Equalisation

Balances variable flow, oil concentration and suspended solids before separation.

2Oil Skimming

Recovers floating oil early and reduces the load on downstream equipment.

3CPI Separation

Inclined corrugated plates separate free oil and settleable solids by gravity.

4DAF Polishing

Microbubbles float fine solids, dispersed oil and conditioned flocs for removal.

5Treated Water

Clarified water proceeds to discharge, biological treatment or further reuse treatment.

Three Core Oil Removal Technologies

World Technologies can provide each technology as an individual package or combine them as a complete oily wastewater treatment system.

Primary free-oil recovery

Oil Skimmers

Belt, tube or floating oil skimmers continuously attract and remove oil from the water surface. They are commonly installed in collection pits, equalisation tanks, wash-water sumps and separator chambers.

Reduces free-oil loading before CPI or DAF treatment
Supports recovery of concentrated oil with comparatively low water carry-over
Simple operation with options for fixed or floating installation
Suitable for intermittent or continuous oil ingress

World Technologies corrugated plate interceptor for oil-water separation

Gravity oil–water separation

Corrugated Plate Interceptor (CPI)

A CPI uses inclined corrugated plate packs to increase the effective separation area within a compact footprint. Oil droplets rise and coalesce, while heavier solids settle into the sludge zone.

Effective for free oil and settleable suspended solids
No moving parts within the plate separation section
Compact alternative to a conventional gravity separator
Available as a skid-mounted package with oil and sludge collection

View the dedicated CPI system page

Dissolved air flotation system with pipe flocculator for oily wastewater treatment

Fine solids and dispersed-oil polishing

Dissolved Air Flotation (DAF)

DAF introduces fine air bubbles into conditioned wastewater. The bubbles attach to suspended solids, flocs and dispersed oil, increasing buoyancy so the material rises for surface skimming. Heavier solids are removed from the lower sludge zone.

Handles dispersed oil, grease, fine suspended solids and low-density flocs
Can incorporate coagulation, flocculation and pH control
Compact hydraulic loading and automated surface-skimming options
Useful before biological treatment, membranes or final polishing

View the dedicated DAF system page

Selecting the Right Oil Removal System

The correct technology depends on whether the oil is floating, dispersed or emulsified. Laboratory characterisation and treatability testing are important because stable emulsions may require chemical conditioning before physical separation.

Technology	Primary treatment role	Best suited for	Typical integration
Oil Skimmer	Recovers floating free oil from the water surface	Tanks, pits, sumps and equalisation basins	Upstream of CPI, DAF or biological treatment
CPI	Gravity separation of free oil and settleable solids	Oily wastewater with separable droplets and solids	After screening/skimming and before DAF or polishing
DAF	Flotation of fine solids, conditioned flocs and dispersed oil	Variable industrial effluent requiring enhanced clarification	After equalisation and chemical conditioning; before downstream treatment

Actual removal performance, chemical demand and treated-water quality depend on influent characteristics and the agreed design basis.

Industries and Applications

Oil and gas facilities
Petrochemical and chemical plants
Power generation
Marine and port facilities
Vehicle and equipment washing
Metalworking and manufacturing
Food, beverage and distilleries
Oleochemical processing
Pharmaceutical production
Stormwater and containment areas

How World Technologies Helps

Wastewater sampling and oil-characterisation review
Process selection and treatment-train design
Hydraulic sizing, equipment layout and material selection
Skid-mounted system supply and integration
Electrical, instrumentation and automation packages
Installation supervision and commissioning
Operator training, optimisation and maintenance support
Upgrades to existing oil–water separators and DAF units

Frequently Asked Questions

Can one oil removal technology treat every type of oily wastewater?

No. Oil skimmers are best for floating free oil, CPI units separate gravity-separable oil and solids, and DAF systems target finer suspended material and dispersed oil after suitable conditioning. A combined process is often more reliable for variable industrial effluent.

Can CPI remove emulsified oil?

CPI is intended primarily for free oil that can separate by gravity. Stable emulsified oil may require pH adjustment, emulsion breaking, coagulation and flocculation, followed by DAF or another polishing process.

Where should an oil skimmer be installed?

Oil skimmers are commonly installed in collection pits, equalisation tanks or dedicated separator chambers where floating oil can accumulate without excessive turbulence.

Can the treated water be reused?

Potentially. Reuse depends on the final water-quality requirement. CPI or DAF effluent may need biological treatment, filtration, activated carbon, ultrafiltration, reverse osmosis or disinfection before reuse.

Plan an Oil Removal System for Your Facility

World Technologies can assess your oily wastewater, recommend the appropriate combination of oil skimming, CPI and DAF, and deliver a complete engineered solution.

Discuss Your Application