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Mixotrophic bacteria for environmental detoxification of contaminated waste and wastewater

journal contribution
posted on 04.01.2022, 11:50 by Liping Huang, Xin Xing, Peng Zhou, Gianluca Li-PumaGianluca Li-Puma
Mixotrophic bacteria provide a desirable alternative to the use of classical heterotrophic or chemolithoautotrophic bacteria in environmental technology, particularly under limiting nutrients conditions. Their bi-modal ability of adapting to inorganic or organic carbon feed and sulfur, nitrogen, or even heavy metal stress conditions are attractive features to achieve efficient bacterial activity and favorable operation conditions for the environmental detoxification or remediation of contaminated waste and wastewater. This review provides an overview on the state of the art and summarizes the metabolic traits of the most promising and emerging non-model mixotrophic bacteria for the environmental detoxification of contaminated wastewater and waste containing excess amounts of limiting nutrients. Although mixotrophic bacteria usually function with low organic carbon sources, the unusual capabilities of mixotrophic electroactive exoelectrogens and electrotrophs in bioelectrochemical systems and in microbial electrosynthesis for accelerating simultaneous metabolism of inorganic or organic C and N, S or heavy metals are reviewed. The identification of the mixotrophic properties of electroactive bacteria and their capability to drive mono- or bidirectional electron transfer processes are highly exciting and promising aspects. These aspects provide an appealing potential for unearthing new mixotrophic exoelectrogens and electrotrophs, and thus inspire the next generation of microbial electrochemical technology and mixotrophic bacterial metabolic engineering. Key points: • Mixotrophic bacteria efficiently and simultaneously remove C and N, S or heavy metals. • Exoelectrogens and electrotrophs accelerate metabolism of C and N, S or heavy metals. • New mixotrophic exoelectrogens and electrotrophs should be discovered and exploited. Graphical abstract: [Figure not available: see fulltext.].

Funding

National Natural Science Foundation of China (Nos. 52070032 and 21777017)

Fundamental Research Funds for the Central Universities (No. DUT21LAB101)

Programme of Introducing Talents of Discipline to Universities (B13012)

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Applied Microbiology and Biotechnology

Volume

105

Issue

18

Pages

6627 - 6648

Publisher

Springer

Version

AM (Accepted Manuscript)

Rights holder

© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature

Publisher statement

This paper was accepted for publication in the journal Applied Microbiology and Biotechnology and the definitive published version is available at https://doi.org/10.1007/s00253-021-11514-5.

Acceptance date

10/08/2021

Publication date

2021-09-01

Copyright date

2021

ISSN

0175-7598

eISSN

1432-0614

Language

en

Depositor

Prof Gianluca Li Puma. Deposit date: 22 December 2021