A 40,000 m³/day municipal works on the Tibetan plateau, operated by us through our local subsidiary. Winter influent arrives at 5–8 °C and the bioreactors sit near 3 °C, which suppresses biological treatment by 30–50%. We hold the standard through it by dosing our own cold-tolerant cultures from October to April, rebuilding the failure-prone mechanical equipment, and running the plant on predictive maintenance rather than waiting for breakdowns.
A CASS plant with a design flaw, discharging over limits long enough to be named in a provincial environmental inspection. We rebuilt the biology, retrofitted the hydrolysis-acidification tank and added catalytic oxidation. Compliant and stable within four months of starting.
We built and still operate the advanced treatment stage on this industrial park works. It is the longest continuous record we have of the catalytic oxidation process running on real, varying industrial effluent.
Chloride above 10,000 mg/L and high sulphide had left the biology barely alive, with COD and ammonia over limits for a long period. Process retrofit plus salt-tolerant COD- and ammonia-degrading cultures at start-up. We then operated the plant for two years.
The complete list, not a selection. All of it is in China — we have not yet delivered a project in Africa, and we would rather say so than imply otherwise.
An incomplete enquiry is still worth sending — tell us the flow and what is failing, and we will tell you what we would do.