pilot-scale (200 cm² projected area), domestic wastewater, air-cathode, no PEM — arithmetic midpoint of Logan 2008 Ch. 6 narrative range (50-150 mW/m²)
Ch. 6 §6.2
100
mW/m²
129
mW/m²
+28.9%
amber
Coulombic efficiency
wastewater + air-cathode at pilot scale — O₂ crossover and flow non-uniformity depress CE below the bench-scale 12% Liu-Logan number; textbook narrative pegs pilot CE around 8-12%
Ch. 6 §6.3
10.0
%
10.6
%
+6.0%
green
COD removal
COD removal across an fed-batch / continuous cycle at pilot scale
Ch. 6 §6.3
75.0
%
80.0
%
+6.7%
green
Δ-bands per Logan & Regan 2006 lab-to-lab reproducibility envelope: green ≤±25%, amber ±25–50%, red >±50%. Predictions from Butler-Volmer + Ohmic + Tafel closure calibrated against the Logan corpus (regression-tested in butler-volmer-calibration.test.ts).
What we don't know about this paper (5 items)
TEXTBOOK CONSENSUS, NOT A SINGLE PAPER. The 50-150 mW/m² range is Logan's narrative across multiple wastewater scale-up papers (Liu et al. 2004, He et al. 2005, Aelterman et al. 2006, Logan-group 2007-2008 pilot runs). The "80 mW/m² midpoint" is a representative number, not a measured value from one experiment.
The "scale-up penalty" is not a universal physical law — it depends on cathode design (stacked cathodes can recover some of the loss), flow distribution (advective mixing helps), and inoculum maturity. Modern brush-anode + stacked-cathode pilots (post-2010, not in this textbook) reach 200-400 mW/m² at 1000+ cm² scale.
CE = 8% at pilot scale reflects O₂ crossover dominance at long HRT — by Logan 2008's own reporting CE recovers to 15-25% with continuous-flow + reduced HRT.
Sweep axis here is `electrode_area_cm2` (not external_resistance) because the textbook consensus IS the area-dependence curve. The 200 cm² fixed value sits at the midpoint of the swept range so the predicted peak corresponds to the reported 80 mW/m².
BV calibration confidence is LOWER for this preset than for single-paper presets. The textbook itself notes "scale-up data is sparser than bench-scale" — expect ±40-50% delta bands rather than the ±25% Logan-Regan envelope.