کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
682381 888983 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of a microbial electrochemical cell using the proton condition in biofilm (PCBIOFILM) model
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Analysis of a microbial electrochemical cell using the proton condition in biofilm (PCBIOFILM) model
چکیده انگلیسی

Common to all microbial electrochemical cells (MXCs) are the anode-respiring bacteria (ARB), which transfer electrons to an anode and release protons that must transport out of the biofilm. Here, we develop a novel modeling platform, Proton Condition in BIOFILM (PCBIOFILM), with a structure geared towards mechanistically explaining: (1) how the ARB half reaction produces enough acid to inhibit the ARB by low pH; (2) how the diffusion of alkalinity carriers (phosphates and carbonates) control the pH gradients in the biofilm anode; (3) how increasing alkalinity attenuates pH gradients and increases current; and (4) why carbonates enable higher current density than phosphates. Analysis of literature data using PCBIOFILM supports the hypothesis that alkalinity limits the maximum current density for MXCs. An alkalinity criterion for eliminating low-pH limitation – 12 mg CaCO3/mg BOD – implies that a practical MXC can achieve a maximum current density with an effluent quality comparable to anaerobic digestion.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 102, Issue 1, January 2011, Pages 253–262
نویسندگان
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