Coffee Roasting Filtration

Coffee Roaster Smoke & Odour Filtration Systems

Practical ESP-based filtration systems for coffee roasteries that need to reduce visible smoke, oil mist, grease build-up and roasting odour without relying on high-energy afterburners.

For 1–3 kg to 25–35 kg roasters Smoke & grease control Optional odour stage Compact installation

Request a Roaster Filtration Assessment See what details we need

Send us your roaster model, duct details and a few photos. We will review the application and advise the most suitable filtration route.

Coffee roaster smoke and odour filtration system

The problem

Smoke and odour can quickly become a commercial issue

Coffee roasting produces a combination of visible smoke, fine particulate, oil mist, grease-laden vapour and odour. For small and medium roasteries, this can become a problem when the exhaust is close to neighbours, residential areas, shared commercial units, hospitality spaces or sensitive outdoor areas.

Visible smoke

Reduce the smoke plume from roasting exhausts and improve the appearance of the discharge point.

Roasting odour

Support odour reduction where roasting smells are causing complaints or creating concern with nearby properties.

Grease and residue

Capture oil mist and fine particulate before they leave the exhaust, helping reduce contamination in the duct route.

Our approach

ESP filtration for coffee roasting exhausts

Electrostatic precipitator technology is well suited to capturing smoke particles, oil mist and grease-laden emissions from coffee roasting exhausts. The system charges particles in the air stream and collects them on washable collector plates.

This gives many roasteries a compact, low-energy alternative to thermal treatment where the main issue is smoke, grease and fine particulate. Where odour reduction is also required, the ESP can be combined with a UV/ozone-assisted odour control stage depending on site conditions.

Suitable for many small and medium coffee roasteries
Helps reduce visible smoke and oil mist
Washable collector cells instead of disposable filter media
Optional UV/ozone-assisted odour control stage
Compact cabinet arrangement for practical installations

Coffee roaster ESP filtration installation

Choosing the right route

ESP filter, odour stage or afterburner?

The best solution depends on the roaster size, exhaust airflow, roasting profile, temperature, duct route and whether the main issue is smoke, odour, or both.

Option	Best suited for	Commercial advantage	Important note
ESP filter	Visible smoke, oil mist and fine particulate	Low energy use, compact design and washable collector cells	Requires routine cleaning depending on roast volume and exhaust loading
ESP + UV/Ozone	Smoke control with light to moderate odour reduction	Practical option where odour reduction is also required	Performance depends on airflow, dwell time and actual odour load
Afterburner	High odour load and heavier industrial roasting exhausts	Strong thermal treatment route for demanding applications	Usually higher energy or fuel consumption and more installation complexity
Wet scrubber	Specific high-load or industrial cases	Can be useful for certain process exhaust applications	Requires water handling, drainage and wastewater consideration

For many small and medium roasteries, an ESP-based system is a practical first option before moving to a full afterburner system. We can review your site details and advise whether ESP filtration is a good fit.

How it works

From polluted roasting exhaust to cleaner discharge

Pre-filtration

The exhaust first passes through a pre-filter stage to help capture larger particles and protect the main collection section.

Particle charging

The high-voltage ioniser section charges smoke particles, fine particulate and oil mist carried in the air stream.

Collection

Charged particles are drawn onto the collector plates, where they are captured and retained for later cleaning.

Optional odour stage

Where required, UV/ozone-assisted treatment can be added to support odour reduction after particulate capture.

Coffee roasting filtration system installation

Suitability

Is this suitable for your roaster?

The correct filtration system depends on more than the roaster batch size. Airflow, exhaust temperature, duct diameter, roasting frequency and installation space all affect the final recommendation.

Roaster batch size and model
Roasting frequency and typical roast profile
Exhaust airflow and duct diameter
Exhaust temperature after the roaster or cyclone
Whether the problem is mainly smoke, odour, or both
Available installation space and discharge location

Important: ESP filters are not a replacement for a proper chaff collector. The roaster should have suitable chaff separation before the filtration unit.

Applications

Compact filtration for real roastery layouts

Coffee roastery installations are rarely identical. Some systems are fitted close to the roaster, while others are positioned after a cyclone or within the available duct route. We review the layout before recommending the best arrangement.

Coffee roaster filtration installation example

Coffee roaster smoke filtration installation example

Commercial benefits

Why roasteries choose ESP filtration

✓

Smoke reduction

Helps reduce visible smoke from the roasting exhaust and improve the appearance of the discharge.

✓

Lower running cost

ESP systems use electricity rather than burning additional gas, making them attractive against thermal afterburners.

✓

Washable cells

The collector cells are cleaned as part of routine maintenance, reducing dependency on disposable filter media.

✓

Compact design

Suitable for many roasteries where space is limited and a practical duct-mounted solution is needed.

✓

Optional odour control

UV/ozone-assisted treatment can be considered where odour reduction is also required.

✓

Application review

Ozcon helps review the roaster, ductwork and site conditions before recommending a system.

Maintenance

Designed to be serviceable, not disposable

Coffee roasting exhaust is naturally dirty, so every filtration system requires maintenance. ESP collector cells capture smoke, oil mist and fine particulate, so they need to be removed and washed periodically.

Cleaning frequency depends on roast volume, roast profile, exhaust loading, chaff separation and operating hours. We can advise expected maintenance requirements once we understand your roaster and usage.

Typical maintenance considerations

Regular inspection of pre-filter and collector cells
Periodic washing of ESP collection plates
Checking drain/sump condition where applicable
Keeping chaff separation effective before the ESP
Replacing UV lamps where an odour stage is fitted

What we need to size the right system

Send us the roaster make and model, batch size, number of roasts per day, duct diameter, exhaust temperature if known, fan airflow if known and photos of the roaster, duct route and discharge point.

Send Roaster Details

Need to reduce smoke or odour from your coffee roaster?

Tell us about your roaster and site layout. We will review the application and advise whether an ESP filter, ESP with odour control, or another treatment route is the most suitable option.

Request Assessment Email Roaster Details