GRUPO 7Ozone technology

Wastewater

Municipal wastewater plants.

An ozone stage can be evaluated after biological treatment to improve selected effluent parameters and support intended disinfection or reuse.

Request an assessmentView category

Wastewater

Effluent changes by shift and season

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.

Application point

Test before fixing capacity

In a wastewater plant, solids, organic load and flow can change together. Testing several operating conditions avoids extrapolating from a single sample.

Injection point, mixing and contact volume are designed for actual flow. Undissolved gas and any residual are managed before water returns to the process.

How we specify a system →

On-site verification

Comparable outlet results

Compare COD, color, turbidity, microbiological indicators and specific energy use against the project objective.

Sampling points and comparison conditions are defined before claiming a reduction or saving. This helps separate treatment effects from normal process variation.

In this category

More wastewater applications.

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 →

View all applications →

Next step

Assess your municipal wastewater plants project.

Share inlet data and the outcome you need. We will propose the next technical step.

Contact Grupo 7