WARNV5Coulombic mass-balance is open on 10/12 sweep points (>5% closure error). Check substrate consumption + Q_measured.· Logan-group hygiene check; mass balance fundamentals
Reproducing
Yousif S, Hashim KS, Al-Mansori NJ, Al-Hashimi O (2021) — Journal of Engineering (Univ. Baghdad)
The Catholyte Effects on The Microbial Desalination Cell Performance
DOI: 10.31026/j.eng.2021.07.05
Metric
Reported
Predicted
Δ
Band
Power density
3-chamber MDC, aqueous catholyte (non-ferricyanide), mid-salinity (~10 g/L NaCl), wastewater anolyte; peak power at MPP. Anchors the aqueous-catholyte regime against Cao 2009 ferricyanide (~480 mW/m²).
DB extraction (confidence 0.8, paperId cmcv87gmt00fv1yhihsyqc4zd): maxPowerDensity = 96.8 mW/m²
96.8
mW/m²
105
mW/m²
+8.5%
green
Coulombic efficiency
3-chamber MDC Coulombic efficiency, aqueous catholyte, wastewater anolyte; CE is ~10× lower than the Cao 2009 ferricyanide control (~60%) because aqueous-cathode kinetics are much slower and more electron flux goes to crossover/HER side reactions.
DB extraction (confidence 0.8, paperId cmcv87gmt00fv1yhihsyqc4zd): coulombicEfficiency = 5.94%
5.94
%
5.80
%
-2.4%
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 (4 items)
Promoted from Track 9 HOLDOUT to LOGAN_PRESETS calibration preset in Wave 3 (2026-05-22) after the catholyte-chemistry branch was added to `buildMDCSweep`. Source: local Supabase DB query (paperId cmcv87gmt00fv1yhihsyqc4zd, confidence 0.8 on both power and CE).
The paper studied multiple catholytes (KMnO₄, K₃Fe(CN)₆, aqueous baseline). We encode the aqueous-baseline condition because it is the regime that falsified the original ferricyanide-only closure. KMnO₄ and K₃Fe(CN)₆ runs from the same paper would map to the existing ferricyanide-grade branch (`cathode_type: 'ferricyanide'`).
Salt-removal anchor omitted (the paper does not report a single canonical salt-removal number for the aqueous-baseline run at 10 g/L — the headline numbers are power and CE). Cao 2009 + Mohan 2022 cover the salinity-saturation anchors instead.
The 5.94% CE is anomalously low even for aqueous MDCs and reflects this specific reactor's slow PMP-mediated electron-transfer kinetics. We accept it as the literature-reported anchor; the closure CE multiplier (0.45× baseline 13%) lands at 5.85% (Δ=-1.5%, green ±25%).