BH

A Review After the First Month

Senior Process Engineer, Northern Pulp Mill

★★★★☆

We engaged w.i.l.d.f.l.o.w.e.r.c.a.s.e.s. to review the membrane bioreactor tuning at our Prince George facility. After the first month of operation, the effluent BOD dropped from 18 mg/L to 9 mg/L, and TSS stabilized below 4 mg/L. The anoxic zone configuration they recommended cut our chemical oxygen demand by 22% without additional capital. The Fisheries Act section 36 compliance data from that period showed zero exceedances. The only friction was the initial flux rate—they pushed 22 L/m²/h, which caused a fouling event on day 12. They adjusted the cleaning protocol to a weekly maintenance wash with 200 ppm NaOCl, and the flux recovered to 20 L/m²/h. The documentation they provided for the quarterly report was precise: flow diagrams, mass balances, and the exact pH control setpoints. I would have preferred a faster response on the fouling issue, but the technical depth of the first-month results justified the wait.

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