Journal
CHEMOSPHERE
Volume 289, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.133122
Keywords
Archaea; Fungi; Bacteria; Ventilation; Microbial metabolism; Co-bioevaporation
Categories
Funding
- Research Foundation for High Level Talents in Kunming University of Science and Technology [10978191]
- Yunnan Applied Basic Research Projects [202001AT070034]
- Yunnan Provincial Foreign Experts Introduction Project [YN2020021]
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The study found that in the co-bioevaporation treatment, archaea grew rapidly under intermittent ventilation, while continuous ventilation promoted fungal growth. Genes related to carbohydrates and lipids metabolism and ATP-associated enzymes were more abundant under continuous ventilation, while intermittent ventilation showed better DNA repair ability and microbial viability.
To obtain a favorable aeration type in co-bioevaporation treatment of concentrated landfill leachate and food waste, and to deeply understand the co-bioevaporation mechanisms, the temporal evolution differences of archaea, fungi and bacteria as well as the related microbial metabolism genes and functional enzymes under intermittent ventilation (IV) and continuous ventilation (CV) were investigated. Results through metagenomics analysis showed that the less sufficient oxygen and longer thermophilic phase in IV stimulated the vigorous growth of archaea, while CV was beneficial for fungal growth. Even genes of carbohydrates and lipids metabolism and ATP-associated enzymes (enzyme 2.7.13.3 and 3.6.4.12), as well as peptidoglycan biosynthesis enzyme (enzyme 3.4.16.4), were more abundant in CV, IV hold better DNA repair ability, higher microbial viability, and less dehydrogenase sensitivity to temperatures due to the critical contribution of Pseudomonas (3.1-45.9%). Furthermore, IV consumed a similar amount of heat for water evaporation with nearly half of the ventilation of CV and was a favorable aeration type in the practical application of co-bioevaporation.
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