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Bio enzymes in Kenya cost KES 1,500 for BioClean Septic and KES 3,000 for BioClean Septic Plus from BioTank, depending on the treatment strength your biodigester or septic tank needs. They are live bacterial cultures, not chemicals. Once added to your system, they break down waste, reduce odour, and keep your biodigester functioning efficiently.
Most homeowners only think about bio enzymes once something goes wrong. A slow drain. A bad smell near the manhole. A biodigester that seems to be filling up faster than it should. This guide answers the questions we hear most from clients across Thika, Ruiru, Kitengela, and Nakuru.
A biodigester does not just store your waste. It treats it. Inside every tank, colonies of bacteria called Bacillus species break down human waste, fats, proteins, and carbohydrates. This is called anaerobic digestion, which simply means digestion without oxygen.
Bio enzymes are how you top up that bacterial colony. Over time, harsh cleaning chemicals, heavy rain, or a system that has been neglected can wipe out the bacteria your tank depends on. Adding a fresh dose of bio enzymes in Kenya gets the colony back to full strength.
Bio enzymes do three jobs at once. They speed up sludge breakdown. They cut down hydrogen sulphide, which is what causes that rotten egg smell. And they help restore a healthy microbial balance so your system does not need constant exhausting.
Curious how the rest of the system works? Read our full guide to Biotank biodigester systems.
BioTank Africa supplies two enzyme products, and knowing the difference saves you money.
BioClean Septic is the standard strength formula. It is built for routine maintenance, for systems that are working fine and just need topping up, and for seeding a brand new biodigester after installation. Most homes with a tank between 1 and 5 cubic metres only need this one.
BioClean Septic Plus is up to ten times stronger. Reach for this if your pipes are clogged, your system smells bad no matter what you try, or your tank has been neglected and has heavy sludge buildup. It is also the right call for larger tanks, 6 to 10 cubic metres, that need a bigger dose to work.
A simple rule: if your system is healthy, use Septic. If your system is struggling, use Septic Plus.
Adding bio enzymes to your biodigester pays off in ways you can see and ways you cannot.
Cuts bad odour at the source. Enzymes lower the hydrogen sulphide that causes the rotten egg smell, instead of just masking it.
Reduces exhausting costs. A healthy bacterial colony keeps breaking down sludge on its own, so you call the exhauster truck far less often.
Prevents clogged pipes and backflow. Regular treatment stops solids from building up in your drainage line before they cause a blockage.
Protects your soak pit or drain field. Enzymes lower the organic load in the effluent leaving your biodigester, which helps the surrounding soil keep absorbing water for years instead of clogging up early. If kitchen waste is a big part of your household’s load, pairing enzymes with a properly sized grease trap protects your system even further. See how our grease traps work.
Extends the life of your system. A biodigester that is properly seeded and maintained needs less structural repair over its lifetime, and stays within NEMA discharge standards for treated effluent.
Safe for pipes and the environment. Unlike harsh chemical drain cleaners, bio enzymes are biodegradable and will not corrode PVC pipework or fittings.
Works without electricity. The whole process is biological. There is nothing to plug in and nothing that can break down mechanically.
Saves money over time. A few hundred shillings spent on bio enzymes in Kenya every few months is far cheaper than an emergency desludging bill or a rebuilt soak pit.
BioTank’s bio enzymes are available in two options: BioClean Septic at KES 1,500 and BioClean Septic Plus at KES 3,000. BioClean Septic Plus contains a higher concentration of beneficial bacteria, making it ideal for larger tanks and systems with heavy sludge buildup.
A few things move the price up or down.
Concentration. A stronger bacterial count breaks down waste faster, and that costs more to produce.
Pack size. Buying a bigger tub almost always costs less per gram than buying several small sachets.
Powder or liquid. Powder formulas last longer on the shelf in Kenya’s warm climate, which is part of why BioTank sells enzymes as a dry formulation.
Brand. A trusted supplier will not sell you something that damages your pipes or your tank’s PVC fittings. That is worth paying for.
Call or WhatsApp BioTank Africa for the exact price on BioClean Septic and BioClean Septic Plus, since pack sizes are matched to your tank volume.
[IMAGE 5: A step by step photo or short photo sequence showing a packet being dissolved in a bucket of water, then poured into a manhole or flushed down a toilet. Real installation photos from a BioTank job work better here than stock images, if you have any from the field team.]
Dosing is simple. You do not need a fundi for this part, though your fundi should know how to do it too.
For a new biodigester, apply the treatment during the first few weeks after installation. This gives the bacterial colony a head start before the system faces its first real test.
Watch for these signals.
A persistent bad smell that does not go away after a normal clean. Slow draining sinks or toilets. A tank that needs exhausting more often than it used to. Any of these point to a bacterial colony that has weakened and needs reinforcement.
If you have tried a standard dose of BioClean Septic and nothing has changed after two applications, the issue may be structural rather than biological. At that point, call BioTank Africa for a site assessment rather than continuing to add product.
Kenya has no shortage of suppliers selling biodigester chemicals. What sets BioTank apart is that our bio enzymes are built specifically for the Biotank Biodigester, tested for Kenya’s climate, and backed by a technical team that can walk you through dosing over the phone. Our formulations follow the same anaerobic digestion science recognised by environmental agencies worldwide.
We deliver countrywide, so whether you are in Thika, Ruiru, Kitengela, or Nakuru, you are not stuck waiting on a supplier who only serves Nairobi. Every household biodigester we install also comes with a starter kit that includes BioClean Septic, so your system gets a healthy bacterial colony from day one.
Still deciding between a biodigester and a septic tank, or want to see the full range of products that keep a system healthy?
Browse more sanitation guides on our blog.
Where can I buy bio digester enzymes for sale in Kenya? BioTank Africa sells BioClean Septic and BioClean Septic Plus directly, with delivery across Kenya. Order through our shop or call us for same day dispatch in Thika, Ruiru, Kitengela, and Nakuru.
What is the best biodigester enzyme in Kenya? The best product depends on your situation. For routine care, BioClean Septic is enough. For a struggling or neglected system, BioClean Septic Plus works faster because it carries a much higher bacterial concentration.
How much does biodigester bacteria cost? BioClean Septic costs KES 1,500, while BioClean Septic Plus costs KES 3,000. The right product depends on your tank size and whether your system requires routine maintenance or intensive treatment.
How often should I add enzymes to my biodigester? For a normal household system, dosing every three to six months is enough to keep the bacterial colony healthy. Struggling systems may need a repeat dose after 7 to 14 days.
Can I use bio enzymes in a small biodigester? Yes. Even a small residential system, sized for up to 10 users, needs periodic enzyme treatment to stay odour free and to keep sludge from building up faster than the tank can process it.
Do bio enzymes work in a septic tank too? Yes. BioClean Septic and Septic Plus work in both biodigesters and traditional septic tanks, since both rely on the same anaerobic bacteria to break down waste.
Need help choosing between BioClean Septic and BioClean Septic Plus?
Call BioTank Africa on +254 709 006 300, or visit our shop to order online for countrywide delivery.
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