Membrane Bioreactors (MBR)
Discharge-grade effluent in half the footprint — and reuse-ready without a tertiary stage.
The technology explained.
An MBR couples aerobic biological treatment with ultrafiltration membranes in place of a settling clarifier. The membranes physically separate treated water from the biomass at a nominal pore size of about 0.04 µm, producing a clear, low-solids effluent suitable for direct reuse or polishing.
- Removes >99% of suspended solids and provides ≥4-log barrier to bacteria and protozoa.
- Reduces BOD/COD to single-digit mg/L on well-operated plants.
- Cuts plant footprint by 40–60% vs activated sludge for the same capacity.
- Produces effluent suitable for direct landscape, agricultural or non-potable reuse with minimal further treatment.
- High-end lodges and estates with strict footprint and reuse demands.
- Sites where treated effluent must irrigate guest-facing landscape or fill water features.
- Industrial applications discharging to sensitive receiving environments.
- Where a clarifier cannot physically fit but biological capacity is required.
- ×Energy cost is higher than activated sludge — aeration and membrane scour dominate.
- ×Membranes need scheduled chemical cleaning (CIP); operator discipline is non-negotiable.
- ×Fats, oils and fibres ruin MBR membranes — fine screening upstream is mandatory.
- ×Replacement membrane cost is real and must be modelled in lifecycle economics.
Where Membrane Bioreactors is used.
- Water-reuse projects
- Sites with very limited footprint
- Hospitality and resort with reuse mandates
- High-strength industrial wastewater
How HidroVerse deploys Membrane Bioreactors.
We specify MBR where footprint, reuse quality or discharge compliance forces it — premium lodges, water-stressed estates, sites pursuing closed-loop reuse. Membranes are tier-one OEMs (GE/Suez, Toray, Mitsubishi, Memstar), and CIP regime, screening, blower sizing and replacement-membrane budget are part of the design pack.
A typical Membrane Bioreactors treatment chain.
An MBR couples biology and membrane separation in one stage. The membranes change everything that comes before and after.
Pre-treatment
Fine inlet screening (sub-1 mm) is non-negotiable to protect the membranes; FOG arrestor; equalisation buffer.
Core stage
Aerobic bioreactor with submerged or side-stream UF membranes (typically 0.04 µm). Mixed liquor is filtered through the membrane wall; permeate passes; biomass stays.
Post-treatment
Direct reuse or polishing UV; nutrient finishing (chemical phosphorus, post-denitrification) against the consent.
Waste handling
Membrane CIP cleaning chemistry collected and neutralised; WAS dewatered; reject volume on CIP cycles disposed under chemical-waste manifest.
Other technologies worth knowing.
Buyer's guide.
The questions every commercial buyer should put on the table before signing for a water system. Can't see yours? Send us a brief — a HidroVerse specialist replies within one business day.
Yes — we keep a current reference list organised by application and scale. After a short qualifying call we release names, contacts and (with the host's permission) site-visit options. The conversation between two operations managers is the most honest reference we can offer; we do not gate-keep it.
We start with a SANAS-accredited feed-water panel, profile your demand against verified occupancy or production data (not brochure numbers), and specify against the worst-credible feed and peak demand — with disclosed margins. If a simpler technology will hit the brief, we'll specify the simpler technology and tell you why. We do not earn more by over-spending you; we earn more by you renewing service contracts year after year.
PFD, P&IDs, sizing calculations against verified influent data, equipment schedules with serial numbers, control philosophy, pre-treatment justification, waste-handling and regulatory compliance trail. Audit-ready by an external ECSA-registered engineer is the standard we design to — not a brochure pack with marketing fluff.
Pre-treatment is technology-specific (sediment, hardness, chlorine, biological load) and non-optional. Skipping it is the single largest cause of premature failure on every membrane, media bed and disinfection stage. Watch for suppliers quoting only the core stage — they are selling you a 12-month problem.
Every consumable and major component has a quantified replacement trigger (differential pressure, flow drop, UV intensity drop, salt-passage drift). Replacement schedules and trigger limits are written into the HidroVerse Care contract — visible, auditable and triggered on monitoring data, not guesswork.
Critical components are specified with duty/standby and automatic fail-over so a single failure does not stop supply. Our SLA on critical lines is 4 hours on site; the median lived response over the last 14 months is 2 hours 40 minutes. Telemetry triggers tickets before the operator notices — most failures are flagged, not phoned in.
Continuous telemetry on flow, pressure, conductivity, turbidity and on-skid water quality. Monthly SANAS-accredited compliance sampling is included on HidroVerse Care — not invoiced piecemeal. The audit pack builds itself monthly so when DWS or your insurer arrives, the file is ready in 30 minutes.
Potable applications: SANS 241:2015 (mandatory under the Water Services Act 108 of 1997), the National Water Act 36 of 1998 for abstraction and discharge, NSF/ANSI component certification, WHO Guidelines for design margin. Wastewater: the relevant DWS discharge authorisation under General Authorisation 665 or a site-specific Water Use Licence. We sign off against the legal floor and design to a margin above it.
Survey 1–2 weeks, design 2–4 weeks, install 4–10 weeks, commissioning and proof of compliance 1–2 weeks — typically 8–14 weeks for a lodge or estate, longer for mining and municipal. Delays come from civil works, third-party council approvals and architectural changes; the engineered scope rarely slips.
Survey, lab analysis, design pack, equipment, install, commissioning, operator training, the first year of monthly compliance sampling and the agreed scope of HidroVerse Care. Civils, electrical reticulation, third-party council fees and any architectural integration work are quoted separately and scheduled into the contract. If your quote has 'allowances' and 'provisional sums' across the page, you are buying a future invoice.