Effluents
Ozone for wastewater.
Ozone can be integrated as an advanced treatment stage when the treatment goal, effluent composition and process economics justify it.
Grupo 7DesignFabricationInstallationTechnical service
The application
Actual effluent determines the system, not the generator sheet.
A municipal plant, a food-factory discharge and a pharmaceutical effluent may share the same flow but have very different ozone demand. Composition, pH, solids and variation across a day determine whether oxidation adds value.
Before investing in industrial capacity, treatability testing can show ozone consumption, which parameters respond and whether the stage belongs before or after other treatment.
Treatment options
Three problems that need different treatment.
Design must answer a measurable outlet target. Ozone may serve as polishing, targeted oxidation or a component of odor control.
Municipal effluent
Consider a stage after biological treatment to improve selected parameters or support disinfection. Test several operating conditions.
Industrial discharge
The matrix may contain difficult compounds, color or strong variation. Measure the target and examine effects on later stages.
Odor and pumping stations
H₂S and intermittent emissions call for source, air-capture or hydraulic-point assessment, ventilation and off-gas control.
Related applications
Other solutions.
Drinking water
Oxidation, disinfection and water quality.
Explore solutionProcess water
Integration into industrial lines and circuits.
Explore solutionFood and beverage
Water for washing, bottling and production.
Explore solutionSpecific applications
From municipal effluent to industrial discharge.
Explore wastewater streams with different loads, contaminants and flow variation to plan a useful treatability test.
Municipal wastewater plants
An ozone stage can be evaluated after biological treatment to improve selected effluent parameters and support intended disinfection or reuse.
Effluent demand changes with seasons, rainfall and plant operation. Test dose and contact time before fixing capacity, transfer and energy demand. Off-gas management and maintenance are part of the design.
How to verify: Compare COD, color, turbidity, microbiological indicators and specific energy use against the project objective.
Read application →Industrial effluents
Food, chemical, paper and pharmaceutical effluents can vary widely. Ozone is assessed as an oxidation or polishing step when a measurable target contaminant exists.
Flow alone is insufficient for sizing. Analyze COD, pH, solids, target compounds and variability; treatability testing helps establish ozone demand, byproducts and the best point in the treatment train.
How to verify: Measure target compounds before and after treatment, together with transferred dose and operational changes.
Read application →Leachate and difficult effluents
Leachate often has hard-to-predict loads and composition. Ozone may be a candidate for oxidation testing, but feasibility depends on the actual matrix and pretreatment.
First characterize the stream and define the parameter to change. Then test dose and time, watch for possible byproducts and compare cost with other stages. No universal reduction is promised without testing.
How to verify: Track COD, color, target contaminants and any change in biodegradability, as appropriate.
Read application →Wastewater pumping stations
Pumping stations can generate hydrogen sulfide and changing odor loads. Ozone is assessed for captured air or selected hydraulic points before odor disperses.
Identify retention time, ventilation, airflow and H₂S variation. Treatment needs capture, mixing, contact, off-gas control and worker protection; direct water injection requires a separate hydraulic review.
How to verify: Measure H₂S or relevant compounds and record complaints, flow and residual ozone under comparable conditions.
Read application →Next step
Test your effluent before sizing equipment.
Send analyses from different operating conditions and the outlet limit you need.
Decision criteria
How to decide on effluent treatment
Variation drives design
The same facility can discharge different effluent by shift, cleaning cycle or season. A proposal based on one sample may miss demand peaks. Sampling and, where appropriate, pilot testing should represent the real operating range.
Investment decision
A pilot compares response at different doses and contact times. The next review covers energy, feed gas, transfer and maintenance. We recommend testing wastewater before major investment in this application.