Clean in. Compliant out.
Your plant pays for water twice: once to store it safely, and once to send it down the drain. Both happen in tanks, and both go wrong the same way: water that sits still and runs out of oxygen.
charges from 1,000
mg/L limit
(the H₂S smell)
mg/L limit
City of Cape Town Wastewater & Industrial Effluent By-law (2013), Schedule 1.
Your raw-water storage tank
Municipal water is clean at the treatment works. Then it sits in your tank, and every carbon filter, softener and RO membrane after it works harder because of what happens there.
Chlorine fades
Once it's gone, bacteria and biofilm can regrow in the tank.
THMs keep forming
Chlorine by-products build up as stored water ages.
Sediment after outages
Pipe bursts and pressure drops send dirt into your tank.
Stale, layered water
Dead zones and warm layers in big storage tanks.
Where NanoJet™ fits on the way in
The drain has limits
Cape Town charges industrial effluent by strength. Above COD 1,000 mg/L, every extra 1,500 mg/L adds another full treatment cost on every kilolitre you discharge, plus a surcharge for each parameter over its limit. Effluent likely to carry grease, oil or fat must pass through a treatment facility before it reaches the sewer. Other metros have their own by-laws.
🥩 Abattoirs
Blood, fat, paunch contents and manure: very high COD, grease and solids. Fats and solids are the usual by-law failures.
🐟 Fish processing
Fish solids dissolve the longer they sit, pushing COD up. Strong odours, ammonia and flows that swing hour to hour.
🥖 Bakeries
Dough, sugars, starches and fats: high COD plus the separate sugars & starches limit.
🥤 Beverages
Syrup rinse-out, CIP cleaning and pH swings: sugars, COD and pH all need watching.
The balancing tank is where it goes wrong. Left still, strong effluent quickly goes septic: grease floats and sets, solids sink and dissolve back into COD, and sulphate-reducing bacteria make H₂S, the rotten-egg smell that eats concrete and counts against the sulphide limit.
NanoJet™ at both ends
Passive Venturi reactors, powered by a pump: no chemicals, no blowers, no moving parts in the tank. In your effluent balancing tank it:
Keeps it aerobic
No septic H₂S smell or sulphide build-up.
Keeps it mixed
Solids stay suspended, so your screens and DAF see an even load.
Floats the grease
Fine bubbles help lift fats and grease to the surface for skimming.
Starts the breakdown
Oxygen-rich water lets aerobic bacteria get to work on dissolved COD before discharge.
NanoJet™ pre-treatment stage alone, before filtration, on septic-impacted groundwater in the Western Cape. Results depend on your effluent strength and retention time, which is why we start with a lab test.
Where NanoJet™ does NOT go (and why)
Build your lab test
Tick what you want tested by Bemlab, an independent Western Cape laboratory. We'll send you a formal quote within one working day, with sampling bottles, courier and sampling instructions added. The most useful tests are already ticked.
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