Journal
BIOTECHNOLOGY ADVANCES
Volume 44, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biotechadv.2020.107610
Keywords
Biological wastewater treatment; Iron; Synergistic effect; Contaminant removal
Categories
Funding
- National Key R&D Program of China [2018YFC0406303]
- National Natural Science Foundation of China [51908529, 51538011, 21590812, 51821006]
- Program for Changjiang Scholars, Innovative Research Team in University of the Ministry of Education of China
- China Postdoctoral Science Foundation [2018M642543]
- Anhui Provincial Natural Science Foundation [1908085QB88]
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Iron-assisted biological wastewater treatment processes have shown a promising potential in removing various types of contaminants. Synergistic effects between iron and microbes on the contaminant degradation make the role of iron beyond that of a nutritional necessity. Exploration of the synergistic mechanisms and the interactions between iron species and microbes and their metabolic products in bio-iron systems is therefore of significant importance. Iron, including zero-valent iron, ferrous/ferric ions and iron minerals are all reported to be capable of enhancing specific contaminant removals. Although the main role of different iron species in stimulating biological process may differ between each other, their similar transformation pathways may bring us useful information about bio-iron systems. In this paper, an overview of iron-assisted biological wastewater treatments, including anaerobic digestion, S and Cl reduction, N and P removal, heavy metal immobilization, aromatic and halogenated hydrocarbon compounds degradation, and sludge granulation is provided. Also, the potential sy-nergistic effects between iron and microbes involved in these processes are explored. Furthermore, the main advantages, limitations, and challenges for the development of iron-assisted treatment processes are envisaged.
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