Equipment sizing from first-principles engineering science. Mass balance, reaction kinetics, equilibrium analysis, and hydraulic design. Every dimension is calculated, not estimated. Every material is selected from chemical compatibility data, not catalogue availability.
Precision chemical dosing systems for pH adjustment, coagulation, flocculation and disinfection in wastewater treatment.
Automated pH Neutralisation systems for acidic and alkaline wastewater.
Chemical industry wastewater treatment for atex-certified equipment.
Treat polymer and resin manufacturing wastewater. Monomer removal, high COD and suspended solids separation.
The science behind every dimension, every flow, every reaction
There is a difference between sizing equipment by rule of thumb and sizing it by calculation. Rule of thumb gives you something that works. Calculation gives you something that is optimal. At Reynolds & Bauhm, we do not approximate. We calculate. Every vessel volume, every plate angle, every retention time, every chemical dose is derived from chemical engineering science and verified against your specific process conditions.
Complete steady-state and dynamic mass balances across every unit process. Flow rates, concentrations, and loads are calculated at each treatment stage to verify hydraulic and contaminant continuity.
Biological growth rates, chemical oxidation rates, and coagulation kinetics are calculated from Monod, Michaelis-Menten, and Arrhenius equations applied to your effluent characteristics.
Flow profiles, headloss, velocity gradients, and mixing intensity are calculated using Bernoulli, Darcy-Weisbach, and continuity equations for laminar through turbulent regimes.
The engineering science applied to every design
Chemical reactions are balanced and quantified from stoichiometry. Dosing rates for coagulants, oxidants, and precipitants are calculated from molar ratios, not empirical factors. This ensures optimal chemical consumption and minimal residual.
pH, solubility product, and redox potential are calculated from thermodynamic equilibrium constants. Metal precipitation, phosphorus removal, and ammonia stripping are all designed from equilibrium data, not trial and error.
Clarifier design is calculated from settling velocity analysis, zone settling theory, and solids flux. Plate spacing, angle, and tank depth are all dimensioned from the calculated settling characteristics of your suspended solids.
DAF air-to-solids ratios, bubble size distributions, and rise velocities are calculated from Henry's law, Stokes' law, and bubble coalescence theory. Not from manufacturer tables, but from fluid mechanics.
MBBR carrier surface area, SBR cycle times, and activated sludge MLSS are calculated from Monod kinetics, yield coefficients, and decay rates specific to your organic load and nutrient profile.
Vessel wall thickness, weld specifications, and reinforcement are calculated from ASME and EN pressure vessel codes. Stress analysis, fatigue life, and buckling resistance are all verified before fabrication.
This 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.
Equipment specified for operational temperatures from -20°C to +60°C with appropriate insulation and heating options.
Material selection based on detailed water chemistry analysis. Cathodic protection and coating options for aggressive duties.
Equipment designed for 380-415V 50Hz, 460-480V 60Hz, and generator-backed installations for remote sites.
Compact vertical layouts, containerised skids, and modular expansion options for space-restricted installations.
Speak with our process engineers to understand how first-principles chemical engineering calculations can optimise your treatment plant design, reduce chemical consumption, and improve long-term reliability.
Our expertise spans multiple industries with sector-specific water treatment solutions.