Ozone engineering support

Ozone System Design & Integration

Practical ozone system design for water treatment, hygiene, process water and advanced oxidation applications. We help you define the ozone dose, injection method, contact arrangement, controls and safety requirements before equipment is purchased or installed.

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What we deliver

Engineering information your installers, operators and auditors can actually use.

Ozone projects often fail because the generator is selected before the process has been properly defined. Our role is to turn the application into a clear technical package.

Process design and sizing Ozone dose, contact time, mass transfer allowance, residual targets and operating assumptions.
Injection and contact design Venturi, side-stream, static mixer, contact vessel or diffuser arrangements depending on hydraulics and target performance.
P&ID and GA drawings Clear layouts showing tie-in points, valves, instruments, drains, vents, destruct units and utilities.
Control philosophy Setpoints, alarms, interlocks, generator enable logic, sensor feedback and safe shutdown requirements.
Equipment specification Generator, oxygen supply, instrumentation, materials, pipework compatibility and off-gas handling.
Commissioning plan Practical checklist for installation review, wet testing, residual verification, operator training and handover.

Materials note: Ozone-compatible wetted materials are essential. SS316L, PTFE, PVDF and EPDM are commonly used. PVC, natural rubber and unsuitable elastomers should normally be avoided in ozone service.

Design approach

From treatment target to working system.

We do not treat ozone design as a generator selection exercise. The generator is only one part of the system. The real performance comes from transfer efficiency, contact time, controls and safe integration.

Define the treatment objective

We clarify whether the project is driven by disinfection, oxidation, odour, colour, COD reduction, pesticide removal, iron and manganese oxidation or process hygiene.

The application defines the dose, not the catalogue.

Confirm the hydraulic conditions

Flow rate, pressure, available contact volume, temperature, water quality and operating pattern determine the injection method and expected transfer efficiency.

Good hydraulics make ozone easier to control.

Select the ozone and oxygen package

We assess whether the system should use integrated oxygen, PSA oxygen, LOX or dry air, then size the generator with sensible headroom.

Oversizing without control can create new problems.

Engineer injection and contact

Ozone must be dissolved, mixed and given enough contact time. We design around mass transfer, off-gas separation and safe venting.

The contact system is where performance is won or lost.

Build the control and safety logic

Flow switches, pressure monitoring, ozone sensors, destruct status, emergency stop and automatic shutdown logic are defined before commissioning.

Safe systems are designed, not added at the end.

Venturi with static mixer

Often the most practical option for pressurised side-stream systems. It can deliver strong mass transfer in a compact footprint when pressure and flow are suitable.

Pressurised contact vessel

Useful where higher contact time is needed, particularly for disinfection or oxidation duties where residual control matters.

Side-stream recirculation loop

Suitable for tanks, balance vessels and existing process lines where treating a controlled side-stream is more practical than treating the full flow directly.

Fine bubble or diffuser contact

Can work when long contact time is available, but transfer efficiency and off-gas management must be considered carefully.

Advanced oxidation

Ozone can be combined with UV or hydrogen peroxide for more demanding oxidation duties. This can be powerful, but it needs careful validation and control.

Injection and contact

The generator is not the whole system.

The correct injection and contact arrangement depends on your process conditions. We size and specify the system around flow, pressure, contact time, target residual and available space.

Controls and automation

Stable ozone performance needs clear control logic.

A well-designed ozone system should be easy to operate, easy to maintain and safe under abnormal conditions. We define the instrumentation, operating states, alarms and interlocks needed for reliable operation.

Process monitoring

ORP monitoring for trend-based control where appropriate
Dissolved ozone measurement for applications needing tighter residual control
Flow, pressure, temperature and oxygen supply status
Sampling points for verification and commissioning

Safety interlocks

Low flow shutdown
High pressure or vacuum fault protection
Ambient ozone alarm integration where required
Off-gas destruct status and emergency stop logic

Automation

PLC/HMI control with clear setpoints and alarms
Modbus TCP or hardwired I/O to site SCADA
Data logging for validation and operational review
Remote monitoring where suitable

Operator usability

Simple operating states and clear alarm messages
Maintenance access designed into the layout
Commissioning checklist and SOP support
Practical handover for site teams

Build formats

Designed around your site, not forced into one standard layout.

Depending on space, access, weather exposure and installation constraints, ozone systems can be supplied in several formats.

Skid-mounted systems Factory-assembled packages for straightforward tie-in, testing and commissioning.

Framed assemblies Open-frame packages for plant rooms where service access and visibility are important.

Enclosed cabinets Weather-protected or controlled-access enclosures for outdoor and semi-exposed installations.

Container or trailer units Mobile or temporary systems for pilots, hire duties, emergency treatment or short-term projects.

Retrofit integration Ozone packages designed around existing tanks, pumps, pipework, treatment assets and site controls.

Common pitfalls

Problems we regularly see in ozone projects.

Many ozone systems are sold as equipment packages before the process has been properly understood. These are the issues we try to remove early.

Generator output selected without checking ozone demand, transfer efficiency or contact time.

Weak injection design causing poor dissolution, unstable residuals and excessive off-gas.

No clear distinction between ORP monitoring and dissolved ozone measurement.

Missing off-gas destruct, ambient ozone safety or shutdown logic.

Incompatible materials used in ozone service.

No service access for sensors, injectors, valves or destruct units.

Control systems that are too complex for operators or too basic for the process.

Skipping pilot tests when water quality or treatment targets are uncertain.

Pilot testing

When uncertainty is high, prove the process before committing to CAPEX.

Pilot work is not always necessary, but it can be the right step when the application is new, the water quality varies or the performance target is commercially sensitive.

A pilot may be useful when:

The water quality changes seasonally or from batch to batch.
The target involves COD, colour, odour, taste, pesticide residues or complex oxidation chemistry.
The application has strict microbiological or validation requirements.
The site wants to reuse existing tanks, pumps or treatment assets.
The project carries high CAPEX risk and internal proof is needed before approval.

Compliance and safety

Designed with UK expectations in mind.

Ozone is a powerful oxidant and must be treated as an engineered system, not just a treatment add-on. We consider safety, materials, exposure, backflow prevention and documentation from the start.

Ozone exposure and gas safety

Ambient ozone monitoring, ventilation, destruct units, interlocks and emergency shutdown can be included where required.

Water fittings and backflow prevention

Injection systems should be designed to prevent backflow and protect the wider water system.

Biocidal Products Regulation context

We can help clients understand the practical technical context for ozone use, although formal regulatory interpretation should be confirmed separately where required.

Documentation and audit readiness

P&ID, control narrative, commissioning records and SOPs help make the installation easier to review, operate and maintain.

Important: Ozcon provides practical technical guidance and engineering support. This page is not legal or regulatory advice.

FAQ

Ozone system design questions.

Can you design around ozone equipment we already own?

Yes. We can review existing generators, injectors, pumps, tanks and controls, then advise whether they can be reused, modified or should be replaced.

Do you supply drawings?

Yes. Depending on project scope, we can support with P&ID drawings, general arrangement layouts, tie-in guidance and equipment specification documents.

Can you support commissioning?

Yes. We can provide commissioning plans, validation checklists and site support where required. Installation works are normally handled by the client’s mechanical and electrical contractors unless agreed separately.

Do you work with PSA oxygen, LOX or dry air?

Yes. The correct oxygen source depends on ozone output, concentration, site utilities, operating cost and safety requirements.

Is ORP enough to control an ozone system?

Sometimes, but not always. ORP is useful for trend control in many water systems, but dissolved ozone measurement may be needed where residual concentration is critical.

Need help specifying an ozone system?

Ozcon supports industrial clients with ozone system sizing, design, specification and supply for water treatment, hygiene and advanced oxidation applications.

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