Tertiary Treatment Systems
Hydroxy designs Tertiary Treatment systems to further improve treated wastewater through advanced filtration, membrane treatment and disinfection—delivering water quality suited to defined reuse and discharge requirements.
Tertiary Treatment
Tertiary treatment is the advanced polishing stage of wastewater treatment, designed to improve water quality after primary and biological treatment have already removed the major pollutant load.
Hydroxy Water Technologies designs tertiary treatment systems according to the incoming treated-water quality and the quality required for its final use. Rather than applying a standard filtration package, we combine the appropriate polishing technologies to achieve reliable and efficient final treatment.
Even after earlier treatment stages, water may still contain residual:
- Suspended Solids
- Fine Particles
- Turbidity
- Colour & Odour
- Residual Organic Matter
- Microorganisms
- Dissolved Contaminants, depending on the application
Tertiary Treatment Principle
The principle of tertiary treatment is to remove residual contaminants left after previous treatment stages and condition the water for its intended final application. A typical treatment sequence may follow: Treated Water → Filtration → Advanced Polishing → Disinfection → Storage → Reuse
Fine suspended solids and turbidity are reduced through pressure sand, multimedia or other suitable filtration.
Activated carbon can be incorporated where reduction of colour, odour and selected residual organic contaminants is required.
Ultrafiltration or other membrane technologies may be used when a higher degree of physical separation is required.
UV, chlorination or another appropriate disinfection process can be incorporated to control microorganisms before storage or reuse.
Where the final application requires additional treatment, further conditioning can be incorporated according to the required water-quality specification. Treat only what remains—and treat it to the quality required for the next use.
Engineered Around Your Final Water Quality - Start With the End Use
Tertiary treatment should not be selected by equipment type alone. Hydroxy first evaluates:
- Current Treated-Water Quality
- Turbidity
- Total Suspended Solids — TSS
- COD / Residual Organic Load
- Colour & Odour
- Microbiological Quality
- TDS, where relevant
- Intended Water Reuse
- Required Final Water Quality
Tertiary Treatment Technologies
Reduces residual suspended solids and turbidity.
Provides additional polishing for colour, odour and selected organic contaminants.
Provides finer particle removal and protects downstream treatment equipment.
Provides membrane-based removal of fine suspended particles, colloidal matter and microorganisms.
Where significant dissolved-solids reduction is required, RO can be incorporated as an advanced treatment stage.
UV or controlled chemical disinfection can be incorporated to support final microbiological water quality.
Water Reuse Applications - Turn Treated Water Into a More Useful Resource
The treatment configuration is developed around the actual reuse objective, not simply around achieving clearer-looking water.
Depending on the final treated-water quality and applicable requirements, tertiary-treated water may be considered for applications such as:
- Toilet Flushing
- Landscape Irrigation
- Gardening
- Floor & External Area Washing
- Utility Water
- Cooling-Tower Make-Up, with appropriate additional treatment
- Process Applications, subject to required water quality
- Further Advanced Water Treatment
How It Works - From Treated Wastewater to Reuse-Ready Water
Hydroxy evaluates the existing treated water and identifies the remaining contaminants.
The required final water quality is defined according to the intended application.
The appropriate combination of filtration, membrane treatment and disinfection is selected.
Filters, membranes, pumps, dosing systems, instrumentation and controls are integrated into one treatment process.
The system is tested and operating parameters are optimised to achieve the required final water quality.
Why Hydroxy?
Tertiary Treatment Is About the Quality You Need Next. Adding more treatment stages does not automatically create a better system. The most effective tertiary treatment process is one that understands what contaminants remain, what needs to be removed and what the treated water will be used for.
Hydroxy combines water-quality assessment, filtration engineering, membrane technology, disinfection, automation and practical site integration to develop tertiary treatment systems around measurable treatment objectives.
Our approach begins with one question: "What quality does this water need to achieve before it can be used again?"
Key Benifits
Additional polishing reduces residual suspended contaminants and improves treated-water quality for its intended next use.
Tertiary treatment can prepare treated wastewater for appropriate reuse applications, reducing dependence on freshwater.
Filtration, activated carbon, membranes and disinfection can be combined according to the actual treatment requirement.
Fine filtration and polishing can reduce contaminant loading on downstream membranes, storage systems and reuse infrastructure.
Hydroxy develops the treatment process according to incoming water quality and required final water quality, avoiding unnecessary treatment stages.