Fig. 1: Reactor performance in the tests at a pH set-point of 8.5. | Nature Communications

Fig. 1: Reactor performance in the tests at a pH set-point of 8.5.

From: Integrated urban water management by coupling iron salt production and application with biogas upgrading

Fig. 1: Reactor performance in the tests at a pH set-point of 8.5.The alternative text for this image may have been generated using AI.

a Contents of CH4, H2, and CO2 in the headspace along with the electrolyte pH. b Average CH4, H2, and CO2 concentrations in the feed and upgraded gas. c Average NH3 and H2S concentrations in the feed and upgraded gas. d The Fe-to-electron ratio (RFe/e) and the CO2-to-Fe ratio (\({{{\mbox{R}}}}_{{{{\mbox{CO}}}}_{2}/{{\mbox{Fe}}}}\)). The vertical dotted line in (a) represents the start of continuous gas feeding (i.e. the commencement of experimental phase). All values are means ± standard in deviations of triplicate tests.

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