Simultaneous aerobic nitrogen and phosphorus removal by novel halotolerant fungus Mucor circinelloides SNDM1: Function and metabolism pathway.
Bioresour Technol
; : 131257, 2024 Aug 09.
Article
em En
| MEDLINE
| ID: mdl-39128639
ABSTRACT
Fungi capable of simultaneous nitrogen and phosphorus removal from wastewater is rarely found. Here, a novel fungal strain (SNDM1) performing heterotrophic nitrification, aerobic denitrification, and phosphate removal was isolated and identified as Mucor circinelloides. The favorable nutrient removal conditions by the strain using glucose were C/N ratio of 25-30, salinities of 0â¯%-3â¯%, and pH of 7.5. Strain SNDM1 achieved ammonium, nitrite, nitrate, and phosphate removal rates of 5.23, 10.08, 4.88, and 0.97â¯mg/L/h. Nitrogen balance indicated that gaseous (18.60â¯%-24.55â¯%) and intracellular nitrogen (43.76â¯%-70.63â¯%) were primary fate of initial nitrogen. Enzyme activity revealed that ammonium removal occurred through heterotrophic nitrification and aerobic denitrification. Removed phosphorus was mainly transformed into cell membranes (56â¯%-64â¯%) and extracellular polymeric substances (20â¯%-26â¯%). Orthophosphate was the major intracellular phosphorus species, while polyphosphate and pyrophosphate existed extracellularly. These findings highlight the potential of this fungal strain for bioremediating polluted wastewater.
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MEDLINE
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En
Ano de publicação:
2024
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Article