
Opacity Control
APC Technologies provides high-performance opacity control systems that remove visible emissions and can achieve zero opacity for even the most challenging industrial applications.
Whether using our proprietary UHF® systems, baghouses, or venturi scrubbers, we deliver low-maintenance solutions that ensure strict permit compliance and positive community relations.
Opacity Control Needs Served
check_circle Compliance with Opacity/Visible Emission limits down to zero opacity
check_circle Reduce complaints from neighbors regarding visible emissions
check_circle Provide low-maintenance systems so that plant staff can focus elsewhere
APC’s Odor Control Systems
- Most UHF® system installations achieve zero opacity
- Successfully implemented in many different industries
- Removes very fine particulate, both condensed and solid phase, including:
- Oil mist
- Smoke
- Haze
- Condensed acid mists (e.g., H2SO4)
- When the particulate is sticky, oily, or contains water, the UHF® is even more advantageous as the UHF® has no issues with blinding, plugging or fouling
- Provides control efficiency of up to and in excess of 99% including sub-micron size particulate
- Applications range down to particle sizes of less than 0.05 micron
- Offered in corrosion-resistant materials
- Simple operation
- Low maintenance costs and no wastewater
- No process downtime required for filter roll change out
Learn more about UHF® Systems
- APC Baghouses can provide good performance for opacity control for opacity caused by dry solid particulate
- APC Baghouses are offered in corrosion-resistant materials
- Additional contaminants besides opacity and fine particulate can also be addressed with APC Baghouses, including acid gases and gas-phase contaminants such as SOx, mercury, and VOCs, through the use of various injected sorbents
Learn more about Baghouses
- APC HEPA filters can provide a very high level of performance (99.99%) on opacity-causing particulate
- APC HEPAs are offered in corrosion-resistant materials
- HEPA filters can foul quickly with high particulate loadings and/or in the presence of free liquids such as water or oil. HEPA filter units are typically employed as a polishing treatment step after other filtration steps
- For control of opacity-causing emission sources that contain liquid mists only (i.e. little or no solid particulate present) APC mist eliminators may be employed
- APC Mist Eliminators are offered in corrosion-resistant materials
- Mist Eliminators do not provide good performance for submicron droplets or solid particulate. Because of these limitations, APC typically employs mist eliminators as part of a larger overall emission control system
- APC VP Series Venturi scrubbers can provide good control of opacity-causing-particulate, especially when the particulate size is larger than 1 micron
- APC Venturi Scrubbers are offered in corrosion-resistant materials
- If the majority of the particulate is submicron, as is typically the case with thermally generated particulate, Venturi scrubbers will have difficulty providing very high removal efficiency
- Venturi scrubbers generate wastewater, and APC will work with our clients to assess the estimated volume of wastewater and associated operating costs
Learn more about Venturi Scrubbers
Featured Opacity Control Projects
Rubber Curing Ovens
Opacity control for multiple rubber curing ovens at a manufacturing facility in the Northeastern USA. Zero opacity permit requirement has been met consistently for the 10 years since the systems were installed.
Asphalt Truck Loading
Opacity control for multiple asphalt truck loading facilities operated by a Fortune 100 petroleum refining company at facilities across the Midwestern and Southern US.
Fire Testing Facilities
Opacity control for multiple testing laboratories located in the Eastern and Southeastern US.
Fiberglass Extrusion
Opacity control for a fiberglass extrusion process at manufacturing facility in the Northern US.
Our Opacity Control Systems Serve a Wide Range of Industries
Click to flip each card.
Shredding, Recycling, and Metals
- Aluminum rolling mills and forging plants
- Auto recycling
- Electronics recycling
- Foundries
- Gold production
- Metals (non Al and Fe)
- Mining
- Scrap shredding and recycling
- Steel fabrication
- Titanium
Oil, Asphalt, and Petrochemicals
- Adhesives
- Asphalt plants and terminals
- Lubricant production
- Oil mists
- Plastics
- Plastic extrusion
- Polymers
- Resins
- Rubber products
Food, Packaging, and Consumer Products
- Bakeries
- Cannabis
- Drying ovens
- Fertilizer
- Foam products
- Food and beverages
- Packaging
- Spray drying operations
- Textile finishing
- Tires
Chemicals, Solvents, and Construction Materials
- Boilers
- Chemicals
- Coating operations
- Drying ovens
- Extrusion coating
- Fire testing
- Fire suppression testing
- Insulation materials
- Kilns – process (various)
- Printing
- Refractory
- Roofing products
- Sealants
- Wood products
Energy, Electronics, and Batteries
- Batteries
- Biomass furnaces
- Combustion process emissions
- EV & lithium-ion battery plants
- Power plants
- Syngas cleaning
Incineration and Waste Management
- Hazardous waste incineration
- Medical waste incineration
- Military waste incineration
- Pharmaceutical waste incineration
- Sewage Sludge Incineration
- Toxic waste incineration
- Wastewater treatment
See a full list of our industries served.
Benefits of Our Opacity Control Systems
workspace_premium Meet client opacity requirements down to zero opacity
trending_up Minimal operation and maintenance requirements
handshake Experienced partner
Choosing Opacity Control Technologies

When evaluating opacity control technologies, a variety of factors should be considered, including:
– Required opacity levels
– Particulate matter size distribution
– Contaminant loading levels
– The presence of additional pollutants in the gas stream including condensing liquids
– Lifecycle cost of the system
APC has no bias toward any technology and is pleased to present multiple technologies with a comparison of capital and operating costs.
Need Opacity Control?
Talk to one of our experts today.
engineering
APC Technologies is here to support you every step of the way. We’ll work to learn the details of your process emissions and recommend the best emission control system to meet your needs and goals.
Phone: 412.344.1870
Proven Opacity Control Experience
We are an established leader in emission control systems with over two decades of successful installations.
engineeringOver 50 industries served.
autorenew40% of projects are for repeat customers.
workspace_premium20+ years of proven installations in emission control applications.
punch_clock6,804,000,000,000 CF (cubic feet) of polluted air treated.
APC proudly serves Fortune 50 companies, small businesses, and everything in between.
Check out our Selected Customers List and our Project Gallery to learn more about our work.
Image credits: APC Technologies, Inc. 2024.
