Tertiary Treatment
Final Polishing for Compliance and Reuse
Over 500 projects complete
Introduction
Tertiary treatment provides the final stage of effluent polishing to meet strict discharge consents or enable water reuse. These processes remove remaining solids, nutrients and dissolved contaminants that primary and secondary treatment cannot fully address.



Advanced Filtration & Polishing
FLI CAP Technology delivers a range of tertiary solutions including ultrafiltration, membrane polishing, fine solids removal and final settlement. These systems produce clear, low-turbidity effluent suitable for tight regulatory limits.
Water Recovery & Reuse
For sites seeking to reduce water consumption, we integrate reverse osmosis (RO) and high-spec membrane systems to recover treated water for non-potable or process reuse. This reduces operating costs and supports sustainability goals.
Assured Compliance & Monitoring
Our tertiary systems are fully integrated with online monitoring for pH, turbidity, suspended solids and flow. This ensures consistent performance and provides confidence when discharging to sewer or watercourse.
FLI CAP Technology
FLI CAP Technology
Unit 4A, Hampton Heath Industrial Estate
Malpas
Cheshire SY14 8LU
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At FLI CAP Technology, innovation drives our commitment to excellence in every project.
Process Technologies
Pumping Stations
FLI CAP Technology’s effluent pumping systems are engineered to transfer industrial wastewater reliably between treatment stages, maintaining stable flows and protecting downstream processes.
Screening & Filtration
FLI CAP Technology’s screening and filtration systems are engineered to protect downstream treatment processes by efficiently removing solids, fibres and debris from industrial effluent.
Balancing & Effluent Storage
FLI CAP Technology designs and delivers balancing and effluent storage systems that equalise flows and loads, stabilise treatment performance and protect downstream processes across industrial effluent treatment plants.
pH Correction & Chemical Dosing
FLI CAP Technology’s pH correction and chemical dosing systems are engineered to deliver accurate, automated control that protects downstream treatment processes and ensures consistent discharge compliance.
Dissolved Air Flotation (DAF) Clarification
FLI CAP Technology’s Dissolved Air Flotation (DAF) systems are engineered to deliver reliable primary clarification, removing suspended solids, fats, oils and grease from high-strength industrial effluent.
Membrane Bio Reactor (MBR)
FLI CAP Technology’s Membrane Bioreactor (MBR) systems combine advanced biological treatment with membrane filtration to deliver high-quality effluent for sites with stringent discharge or reuse requirements.
Activated Sludge
FLI CAP Technology’s activated sludge systems provide proven, robust biological treatment for high-strength industrial effluent, delivering reliable removal of BOD, ammonia and nutrients across demanding manufacturing environments.
Moving bed Bioreactor (MBBR)
FLI CAP Technology’s Moving Bed Bioreactor (MBBR) systems provide robust, high-rate biological treatment for industrial effluent, delivering stable COD and ammonia removal under variable loading conditions.
Tertiary Treatment
FLI CAP Technology delivers advanced tertiary treatment solutions to polish industrial effluent, achieve strict discharge consents and enable safe water reuse.
Water Reuse & Reverse Osmosis (RO)
FLI CAP Technology designs and delivers water reuse and reverse osmosis (RO) systems that recover high-quality water from treated effluent, helping industrial sites reduce freshwater demand, lower discharge volumes and improve sustainability performance.
Sludge Thickening
FLI CAP Technology designs and delivers sludge thickening and handling systems that reduce disposal volumes, improve dewaterability and support efficient, compliant operation of industrial effluent treatment plants.
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Curious how FLI CAP Technology can enhance your treatment plant?
FLI CAP Technology delivers customised effluent treatment solutions designed around your needs, helping you finish on time and on budget.
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