BZMBR Compact Wastewater Treatment Plant: Say Goodbye to Exhausters for Good

Recurring exhauster costs, blocked driveways and bad smells from a full septic tank are solved by the BZMBR Compact Wastewater Treatment Plant, which treats and safely discharges wastewater on site, continuously, so there is nothing left to exhaust.

The problem you already know too well

The septic tank fills up, you call an exhauster, and you pay for a truck that blocks your driveway and leaves a smell behind, only to repeat the whole cycle a few months later.

If you’re a landlord, it’s worse: tenants complain, viewings get cancelled, and the cost eats into your rental income every single quarter. If you run a school, clinic, or small institution, it’s a compliance headache on top of everything else: NEMA officers asking questions, WHO discharge parameters to meet, and no real system in place beyond “call the exhauster and hope.”

None of this is a plumbing problem. It’s a design problem; you’re using a 20th-century holding tank to solve a problem that modern technology solves permanently.

There’s a better way: treat it, don’t just store it

A septic tank doesn’t treat wastewater; it just stores it until someone hauls it away. Even a well maintained biodigester septic tank only breaks waste down and holds it. The BZMBR Compact Wastewater Treatment Plant (Membrane Bioreactor) does something fundamentally different: it treats the wastewater on-site, continuously, and releases clean, safe effluent, so there’s nothing left to exhaust.

Wastewater flows from your existing septic tank or biodigester into the compact MBR unit, where it’s broken down and purified through a combination of biological treatment and membrane filtration, then discharged safely: clean enough for irrigation, car washing, or safe release to the environment. No more trucks. No more waiting. No more smell.

How the BZMBR Compact Wastewater Treatment Plant actually works

The system follows a straightforward treatment sequence:

1. Screening. Wastewater passes through screens that catch non-biodegradable material (plastics, grit, tins) before it can interfere with treatment.
2. Pre-treatment and mixing. The effluent is mixed with an anaerobic microbial culture and enzymes, such as Septozyme BFB, that begin breaking down solids, reducing sludge volume and odour from the very first stage.
3. Equalization. A buffering stage smooths out peak flows (like a full house of guests, or a school at break time) so the system treats consistently, not erratically.
4. MBR biological treatment. This is where the real work happens. A blower and fine bubble diffusers drive aeration that supports biological degradation and nitrification, an aerobic culture such as Envirozyme BFB helps the process along, biological flocs settle out, and the membrane separates clean water from everything else at a filtration level conventional septic systems simply cannot match.
5. Disinfection. A final stage removes remaining microorganisms before discharge.
6. Safe discharge or reuse. Treated water is released to the environment, or reused for irrigation, car washing, or pavement cleaning.

The result: raw wastewater carrying up to 300 mg/l COD and 150 mg/l BOD5 comes out the other end at roughly 12.6 mg/l COD and 6.3 mg/l BOD5, with 99.9% removal of suspended solids; comfortably beating standard discharge limits, not just scraping by. For kitchens feeding grease into the system, dosing inlet lines with SeptoClean BFB keeps fats and lipids from building up before they reach the membrane, and periodic dosing with Bamoyeast BFB keeps any settled sludge fully digested.

What this actually means for you

• No more exhauster trucks, ever. The BZMBR Compact Wastewater Treatment Plant treats and discharges continuously, so there’s no accumulating sludge tank to empty. This is the single biggest cost and hassle the system removes from your life.
• Compact footprint, fits small plots. Because it’s a single, ultra-compact reactor, the BZMBR Compact Wastewater Treatment Plant installs where a conventional treatment setup, or a soak pit, simply wouldn’t fit. This matters especially on clay soils, where soak pits don’t drain properly and cause the very backups and smells you’re trying to avoid.
• No bad odours, no visual impact, silent operation. Because the process is enclosed and biologically controlled rather than just “held,” there’s none of the smell associated with a full septic tank: a real difference for landlords managing tenant satisfaction or homeowners with close neighbours.
• Minimal chemicals, minimal energy. The system runs on a low-energy aeration process with a compact blower rather than submerged pumps, and no dosing of harsh chemicals, meaning lower running costs and less to go wrong.
• Water you can reuse. Treated effluent meets NEMA Schedule 6 guidelines for irrigation and cleaning use, meaning your garden, compound, or driveway can actually benefit from what used to be a waste problem.
• Minimum human intervention. Maintenance is limited to routine checks; there’s no pump-outs to schedule, no trucks to book, no waiting around.
• Regulatory peace of mind. Designed and tested to the European EN 12566-3 standard, with performance that exceeds current NEMA and WHO discharge parameters (pH, BOD, COD, TSS, coliform counts), so you’re not just compliant today, you’re covered against future regulatory tightening too.

Why the BZMBR Compact Wastewater Treatment Plant is the right choice

The system is built and quality-controlled under ISO 9001 / ISO 14001 conditions, with treatment levels, structural durability, and watertightness independently tested and certified. It’s engineered specifically for exactly the buyers who need it most:

• Homeowners dealing with recurring exhauster costs, small plots, or difficult (clay) soil that won’t support a soak pit.
• Landlords who need to protect rental income by eliminating tenant complaints, service disruptions, and the visible presence of exhauster trucks.
• Small institutions, such as schools, clinics, and similar facilities, that are directly named by NEMA and public health guidance as major sources of wastewater pollution in urban areas, and that carry a compliance obligation their neighbours don’t.

(Worth knowing: the same MBR technology also scales up for hotels, hospitals, municipal systems, and even industrial and slaughterhouse wastewater. If you manage a larger property or a different type of institution, this is still worth a conversation.)

Common questions, answered honestly

Will this disrupt my compound during installation? Installation is designed to be quick and straightforward. The unit connects to your existing septic tank or biodigester rather than requiring you to dig out and replace your current setup.

What about maintenance? The automatic operation keeps maintenance to routine checks rather than active management; there’s no daily attention required.

Does it need a lot of power? No. The system is designed for high energy efficiency and minimal consumption, well within what a typical home or small institution already runs.

What if my plot has clay soil? This is actually one of the strongest reasons to choose this system. Because it discharges treated water rather than relying on soil absorption, clay soil (which defeats conventional soak pits) is no longer a barrier.

Is the treated water actually safe? Yes. The effluent quality exceeds standard NEMA/WHO discharge parameters across COD, BOD5, suspended solids, and pH, and is suitable for irrigation and cleaning reuse.

The real cost comparison

An exhauster visit isn’t a one-time cost; it’s a recurring line item for as long as you own the property. Multiply a single exhauster call by every few months, factor in the inconvenience, tenant friction, and compliance risk, and the arithmetic shifts quickly: a one-time investment in the BZMBR Compact Wastewater Treatment Plant that eliminates that cycle entirely usually pays for itself well within the first few years, and every year after that is money you simply keep.

Ready to stop calling the exhauster?

If you’re tired of budgeting for trucks that should never have been necessary in the first place, the next step is simple: get a free site assessment. Our engineers will look at your property, your soil, and your current setup, and tell you exactly what installing an BZMBR Compact Wastewater Treatment Plant would look like for you, with no obligation.

Do you have a larger property, hotel, clinic, or institution with different needs? We have other solutions that are perfect for you. Visit us at our office at the junction of Kahawa Sukari Avenue and Muranga Road in Kahawa Sukari, or contact us at +254 111 715 578 or info@biozone.co.ke.