Water samples being analysed in a laboratory

Proof, not promises

Case studies: results measured on real plants

Anonymised cases with client-confirmed figures — effluent taken to zero discharge, municipal water displaced by on-site treatment, corrosion stopped at its cost. No invented numbers, ever.

The record

Five cases, every figure client-confirmed.

Each case links to the programme that produced it. The three with the fullest records carry a dedicated write-up — problem, programme and result, with the method that made it hold.

Effluent & heavy metals removal

Steel pipe coating plant

Problem
Acid pickling effluent, very low pH, high chlorides, dissolved iron, zinc and lead. Lime-only treatment left iron high, limited water reuse, generated heavy sludge, and forced a full plant clean every three months, draining 10 to 20 cubic metres each time.
Programme
EPSE chemistry verified at laboratory scale in Finland (November 2024) before full-scale implementation (June 2025). Daily on-site sampling run in parallel against lime-only treatment. pH control automated to a 9.5 target after operator variability was identified as a treatment quality risk.
Result
Iron consistently below 0.37 mg/L (previously above 0.87 mg/L). Lead and zinc removed where lime removed neither. Overall heavy metal reduction above 99.9%. Plant cleaning down from quarterly to once in eight months, that one precautionary. Fully recycled water, zero discharge. Sludge declassification from hazardous waste under review.
Read the full case study See the programme

Process water — reverse osmosis

Food producer, Cosmo City

Problem
Rising municipal water consumption costs.
Programme
A 4.5 m³/h reverse osmosis system on borehole feed, engineered and installed by Prosep, commissioned October 2020.
Result
Operational for over five years. Municipal water cut to a backup role used mainly during planned Rand Water shutdowns. In a reference month, around 1,140 kl of treated water produced against 239 kl of municipal top-up.
Read the full case study See the programme

Alternative supply — rainwater harvesting

Beverage producer, Heidelberg

Problem
Municipal water consumption costs.
Programme
Four 10 m³ rainwater storage tanks installed across the site's harvesting stations with filtration, commissioned December 2023, designed to capture in the order of 2,600 m³ of rainwater a year from roughly 3,000 m² of roof.
Result
Operational; the client has since added further storage of its own, extending the scheme.
See the programme

Effluent reuse

Food producer, Randvaal

Problem
Municipal water consumption costs and effluent leaving site as pure cost.
Programme
Treated effluent recycled for domestic reuse on site (toilet flushing), commissioned February 2022.
Result
Around 907 kl of effluent recycled per month. Operational for over four years. Water paid for once, used twice.
See the programme

Cooling water chemistry

Plastics moulding plant, Pretoria

Problem
Corrosion through a roughly 2 m³/h cooling water circuit damaging production moulds, which were going out for polishing at around R3,000 each.
Programme
A cooling water chemistry programme designed for the circuit and the mould metallurgy.
Result
System fully operational; corrosion problem resolved.
Read the full case study See the programme

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