Simultaneous removal of organics, sulfide and ammonium coupled with electricity generation in a loop microbial fuel cell system.

Abstract:

:A loop microbial fuel cell (MFC) system consisting of a denitrifying organics/sulfide removal MFC and a nitrification chamber was developed, and its performance at different feeding ratios of total organic carbon to sulfide (TOC/S) and dissolved oxygen (DO) levels of cathodic feeding were investigated. High feeding TOC/S ratio favored elemental sulfur production and anodic electron recovery. Introducing oxygen into the cathode enhanced nitrogen removal and electricity generation but hindered elemental sulfur production. At the optimal feeding TOC/S mass ratio of 4.69 and cathodic feeding DO of 4.2 mg/L, 100% of TOC, 100% of sulfide and 82.6 ± 0.9% of total nitrogen were removed, achieving a sulfur production percentage of 35.1 ± 4.4% and a coulombic efficiency of 53.0 ± 2.2%. Cathodic nitrogen removal was catalyzed by denitrifiers, nitrifiers and anammox bacteria. This work provided a novel approach for simultaneously removing organics, sulfide and ammonium coupled with electricity generation from wastewater.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Guo Y,Wei X,Zhang S

doi

10.1016/j.biortech.2020.123082

subject

Has Abstract

pub_date

2020-02-24 00:00:00

pages

123082

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(20)30351-5

journal_volume

305

pub_type

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