Final polishing, filtration, and disinfection that transforms biologically treated effluent into compliant discharge. Advanced oxidation, membrane separation, and activated carbon adsorption for the most stringent permit requirements.
CFD, P&ID, SCADA and commissioning for critical water treatment plants.
Plant layouts, piping isometrics and construction-ready engineering drawings.
Flow, mixing and thermal CFD across treatment and process equipment.
Full mechanical, physico-chemical, biological and sludge equipment range.
Ensuring every effluent stream meets its permit requirements
Tertiary treatment provides the final polishing step that removes residual suspended solids, pathogens, colour, and specific contaminants remaining after secondary biological treatment. For applications with stringent discharge limits, water reuse requirements, or sensitive receiving waters, tertiary treatment is essential for consistent compliance. Reynolds & Bauhm designs each tertiary stage to complement upstream processes and achieve the required effluent quality reliably.
Sand, multimedia, and membrane filtration remove residual suspended solids and polish turbidity to levels required for sensitive receiving waters or reuse applications.
UV, ozone, and chemical disinfection destroy pathogenic organisms to meet microbial discharge limits and protect public health in receiving environments.
Ozone, UV/H±0.2O±0.2, and Fenton processes destroy refractory organic compounds, pharmaceutical residues, and micropollutants that evade biological treatment.
Removing fine suspended solids and polishing turbidity
Multi-media pressure filters with graded sand and anthracite layers for depth filtration of biologically treated effluent. Backwash systems with air scour and water wash ensure sustained performance over long operating cycles.
View Sand FiltersAutomatic backwash filters that clean themselves without interrupting flow. Ideal for continuous operation applications where downtime is not acceptable and operator intervention must be minimised.
View Self-Cleaning FiltersAbsolute-rated cartridge filters for final polishing where specific particle size removal is required. Disposable element design with housings in stainless steel or reinforced thermoplastic for chemical compatibility.
View Cartridge FiltersCloth media disc filters for tertiary solids removal achieving very low TSS in a compact footprint. Low headloss and automated backwash make them ideal for retrofit and upgrade applications.
View Disc FiltersUltrafiltration and microfiltration membranes providing absolute barrier filtration for suspended solids, bacteria, and colloidal matter. Produces consistent filtrate quality for reuse or discharge to sensitive waters.
View Membrane FiltersGranular activated carbon adsorption for colour, odour, organic micropollutant, and pharmaceutical residue removal. Rechargeable carbon systems with steam regeneration or disposable carbon changeouts.
View Activated CarbonDestroying pathogens to protect receiving waters
Ultraviolet irradiation destroys bacteria, viruses, and protozoan cysts by disrupting their DNA. No chemical residuals are introduced to the effluent, making UV ideal for discharge to sensitive aquatic ecosystems and for water reuse applications. Reynolds & Bauhm UV systems include automatic quartz sleeve cleaning, UV intensity monitoring, and validated dose delivery.
Ozone is one of the most powerful oxidants available for wastewater disinfection. It destroys a broad spectrum of pathogens including chlorine-resistant organisms, removes colour and odour, and oxidises organic micropollutants. On-site ozone generation eliminates chemical storage and transport risks.
Destroying refractory contaminants and micropollutants
Combined ultraviolet irradiation and hydrogen peroxide dosing generates hydroxyl radicals that destroy pharmaceutical residues, endocrine disruptors, and persistent organic compounds resistant to biological treatment.
View UV/H±0.2O±0.2 AOPOzone-based advanced oxidation with hydrogen peroxide or UV enhancement achieves rapid oxidation of colour, COD, and specific contaminants in textile, pharmaceutical, and chemical effluents.
View Ozone AOPIron-catalysed hydrogen peroxide oxidation for high-COD industrial effluents. Effective at low pH for colour removal, COD reduction, and degradation of complex organic structures in textile and dyehouse wastewater.
View Fenton ProcessHigh-temperature, high-pressure oxidation for concentrated industrial effluents with very high COD. Destroys refractory organics that resist conventional biological and chemical treatment at ambient conditions.
View Wet Air OxidationThis treatment stage is engineered to achieve specific contaminant removal targets while providing stable, predictable performance across variable inlet conditions. Design parameters are calculated from wastewater characterisation data, regulatory requirements, and site-specific constraints including footprint, energy availability, and operator capability.
Design validated by CFD modelling and pilot testing to confirm performance guarantees.
Equipment selected for 20-year design life with minimal wearing parts and easy access.
Automated dosing and feedback control minimise reagent consumption and sludge production.
Online monitoring and data logging demonstrate continuous consent compliance.
| Design Flow | 10 – 5,000 m³/h (application specific) |
| Inlet Variability | Designed for 1:3 peak-to-average flow ratio |
| Removal Efficiency | 85 – 99% depending on target contaminant |
| Hydraulic Retention | Calculated from kinetic constants and safety factors |
| Power Consumption | 0.5 – 5.0 kWh/100 m³ (process dependent) |
| Chemical Dose | Auto-controlled based on online analysers |
| Sludge Production | 0.2 – 1.5 kg DS/kg contaminant removed |
| Materials | SS304, SS316L, or carbon steel with coating |
No treatment stage operates in isolation. This process is designed to receive conditioned influent from upstream stages and deliver effluent quality suitable for downstream processes. Hydraulic and organic loading rates are balanced across the complete treatment train to prevent bottlenecking and ensure overall plant efficiency. Our engineers model the complete flowsheet to optimise Capital expenditure and Operating expenditure across the plant lifecycle.
Screening, equalisation, and pre-treatment protect this stage from damage and overload.
Effluent quality ensures downstream biology, filtration, or disinfection performs optimally.
Reject streams, filtrate, and centrate are routed back to appropriate upstream points.
Our process engineers will determine the optimal combination of filtration, disinfection, and advanced oxidation to meet your discharge permit or water reuse requirements.
Our expertise spans multiple industries with sector-specific water treatment solutions.