Microbial reverse-electrodialysis chemical-production cell for acid and alkali production

Xiuping Zhu, Marta C. Hatzell, Roland D. Cusick, Bruce E. Logan

Research output: Contribution to journalArticle

Abstract

A new type of bioelectrochemical system, called a microbial reverse-electrodialysis chemical-production cell (MRCC), was developed to produce acid and alkali using energy derived from organic matter (acetate) and salinity gradients (NaCl solutions representative of seawater and river water). A bipolar membrane (BPM) was placed next to the anode to prevent Cl- contamination and acidification of the anolyte, and to produce protons for HCl recovery. A 5-cell paired reverse-electrodialysis (RED) stack provided the electrical energy required to overcome the BPM over-potential (0.3-0.6 V), making the overall process spontaneous. The MRCC reactor produced electricity (908 mW/m2) as well as concentrated acidic and alkaline solutions, and therefore did not require an external power supply. After a fed-batch cycle, the pHs of the chemical product solutions were 1.65 ± 0.04 and 11.98 ± 0.10, due to the production of 1.35 ± 0.13 mmol of acid, and 0.59 ± 0.14 mmol of alkali. The acid- and alkali-production efficiencies based on generated current were 58 ± 3% and 25 ± 3%. These results demonstrated proof-of-concept acid and alkali production using only renewable energy sources.

Original languageEnglish (US)
Pages (from-to)52-55
Number of pages4
JournalElectrochemistry Communications
Volume31
DOIs
StatePublished - Jun 2013
Externally publishedYes

Fingerprint

Acids
Electrodialysis
Alcuronium
Membranes
Bronchiolo-Alveolar Adenocarcinoma
Acidification
Seawater
Biological materials
Anodes
Protons
Contamination
Electricity
Rivers
Recovery
Water
Fluorinated Steroids
Butyrophenones
Fusobacterium
Fat Necrosis
Arsenicals

Keywords

  • Bioenergy
  • Microbial fuel cell
  • Reverse electrodialysis

ASJC Scopus subject areas

  • Electrochemistry

Cite this

Microbial reverse-electrodialysis chemical-production cell for acid and alkali production. / Zhu, Xiuping; Hatzell, Marta C.; Cusick, Roland D.; Logan, Bruce E.

In: Electrochemistry Communications, Vol. 31, 06.2013, p. 52-55.

Research output: Contribution to journalArticle

Zhu, Xiuping; Hatzell, Marta C.; Cusick, Roland D.; Logan, Bruce E. / Microbial reverse-electrodialysis chemical-production cell for acid and alkali production.

In: Electrochemistry Communications, Vol. 31, 06.2013, p. 52-55.

Research output: Contribution to journalArticle

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