Air and emissions
Odor control with engineering discipline.
We assess the odor source, air flow and exposure conditions before designing an ozone solution.
Industrial odor control
The problem starts at the source, not the generator.
A persistent odor may come from a pumping station, wastewater plant, extraction hood, cold room or industrial process. The solution depends on which compounds cause it, how much air moves through the system and when emissions occur.
Grupo 7 designs treatment around the actual stream: capture, ducting, ozone oxidation, contact time, residual ozone control and result verification. Ozone is generated on site and applied where it can react inside the process, with occupied areas protected from uncontrolled release.
The image above illustrates a deodorization system concept; it does not depict a specific Grupo 7 project.
Applications
Where ozone can be integrated.
We select the system architecture around the source and existing process. A kitchen hood, gas scrubber and wastewater stream need different approaches.
Deodorization towers and scrubbers
For a captured air stream, ozone may be introduced into the gas phase, the scrubber's recirculating water or both. We assess compounds such as hydrogen sulfide (H₂S) and certain volatile organic compounds (VOCs), as well as airflow, temperature and available reaction time.
Pumping stations and wastewater plants
Inlet works, tanks and pumping areas can release changing odor loads. Air capture and treatment must fit the water process. If odor is associated with the effluent itself, the application may use a hydraulic stage with mixing, contact and off-gas management.
Kitchen exhaust hoods and ducts
Professional kitchen exhaust may need odor treatment before discharge. We review grease, temperature, duct cleaning, airflow and the space available for mixing and reaction. Treatment takes place within the duct or a contained unit, away from occupied areas.
Cold rooms and storage areas
In cold storage, odor can coexist with moisture and microbial activity. Treatment planning must consider the stored product, room volume, air distribution, staff access, scheduling and conditions before re-entry.
System engineering
From emission to treated air.
Identify sourceCapture and ductGenerate ozoneMix and contactMeasure and control
Gas-phase treatment
In a tower or duct, we define the injection point, mixing with captured air and the available reaction path. Generator output alone does not define performance: contaminant load, humidity, temperature and flow variation also matter.
Scrubber water or effluent treatment
Where a scrubber already exists, ozone addition to its recirculating water can be studied. For odor associated with wastewater, we evaluate the hydraulic application point, transfer through a Venturi or another method, contact time and undissolved gas management. Testing and water chemistry guide the choice.
Components that must work together
- Properly dried air or oxygen, as specified for the generator.
- A generator sized for the real and variable demand.
- Injection, mixing and adequate contact volume or duct length.
- Operating measurements, alarms and interlocks.
- Ventilation, leak monitoring and residual ozone management.
- Maintenance access and performance records.
Assessment and results
A proposal with measurable objectives.
We first locate emission points and review operating data. If the problem changes by shift or season, the design must cover those conditions. Complex applications may call for laboratory or pilot testing before final sizing.
The verification plan can compare inlet and outlet conditions, H₂S or other relevant compounds, exhaust flow and odor observations using the same method before and after treatment. Residual ozone is also monitored at appropriate points. We do not promise one universal removal percentage; acceptance criteria are agreed for each installation.
Frequently asked questions
What to clarify before buying equipment.
Will a generator alone remove an odor?
No. It belongs in a system with capture, mixing, contact, controls and off-gas management. Equipment sized for one scrubber may be unsuitable for a hood or pumping station.
Can hydrogen sulfide be treated?
H₂S is among the compounds assessed in deodorization towers and wastewater stations. Reduction depends on concentration, flow, mixing, reaction time and the other components of the gas stream.
Is ozone released where people work?
For industrial odor control, we prioritize a captured stream or contained treatment system. Monitoring, ventilation, interlocks and access procedures are designed to protect people.
Can ozone be added to an existing scrubber?
It is an option to evaluate. We review tower condition, air and water flows, injection location, materials and existing controls before specifying an upgrade.
Next step
Tell us where the odor appears.
The source, flows and existing process give us a useful starting point for technical assessment.
Specific applications
Odor sources and air to treat.
The strategy depends on where odor starts, how air is captured and when treatment can operate safely.
Cold rooms
Humidity, stored products and door cycles can contribute to odors and environmental contamination. Air ozonation requires strict exposure control.
Review room volume, ventilation, product, materials and access schedule. Treatments run without people, using interlocks, ambient monitoring, ventilation and checks before re-entry.
How to verify: Record air conditions, treatment events, ozone before access and product quality.
Read application →Scheduled indoor treatments
Some commercial or industrial rooms may require environmental treatment outside occupied hours. Ozone is assessed as an unoccupied, scheduled process.
Define rooms, ventilation, surfaces, authorized personnel, warnings and lockout. Sensors, ventilation and re-entry protocols are essential; treatment does not run while people are present.
How to verify: Log the cycle, ambient concentration and verification of a safe level before reopening the room.
Kitchen exhaust systems
Commercial-kitchen discharge can cause odor complaints. Ozone is assessed inside ductwork or an enclosed treatment unit after controlling grease and particles.
Calculate flow, temperature, grease, available duct length, contact and discharge point. Address cleaning, fire safety, fan controls, interlocks and residual ozone.
How to verify: Compare outlet odor under similar cooking loads and check residual ozone.