What question did this study set out to answer?

The aim is to improve elemental sulfur selectivity in membrane biofilm reactors through controlled pH and ORP management.

March 26, 2026ACS ES&T Water

Enhancing Elemental Sulfur Selectivity in Sequential Membrane Biofilm Reactors via Decoupled pH and ORP Control

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Authors

JSJosé SuárezJohns Hopkins University VVVicente Valdés ASAlex SchwarzUniversity of Concepción

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Implication

Sequential membrane biofilm reactor operations reveal pH and ORP control enhance sulfur recovery, indicating improved treatment for mining-influenced waters.

Key Points

The aim is to improve elemental sulfur selectivity in membrane biofilm reactors through controlled pH and ORP management.
Operated a sequential membrane biofilm reactor system for 269 days.
Utilized a hydrogen-based module for sulfate reduction and an oxygen-based module for sulfur recovery.
Implemented decoupled control strategies for oxidation-reduction potential and pH.
Achieved moderate sulfur selectivity of 67.7% under ORP control at alkaline pH.
Shifted to mildly acidic conditions to suppress thiosulfate formation by 92%.
Reached peak sulfate removal flux of 27.81 g S m–2 d–1 and sulfur recovery efficiency of 94.1%.

Cite This Study

Suárez et al. (2026) studied this question.

synapsesocial.com/papers/69c4cd80fdc3bde448919ef6 https://doi.org/10.1021/acsestwater.5c01484

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Implication

Sequential membrane biofilm reactor operations reveal pH and ORP control enhance sulfur recovery, indicating improved treatment for mining-influenced waters.

Enhancing Elemental Sulfur Selectivity in Sequential Membrane Biofilm Reactors via Decoupled pH and ORP Control

Discussion

Member takes

Implication

Key Points

Cite This Study

Enhancing Elemental Sulfur Selectivity in Sequential Membrane Biofilm Reactors via Decoupled pH and ORP Control

Discussion

Member takes

Implication

Key Points

Cite This Study

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