Abstract
Formaldehyde is widely used in chemical manufacturing industry and classified as a human carcin- ogen. Discharging wastewater containing formaldehyde without treatment can cause serious risk to the water environment. In this study, a formaldehyde-resistant fungal strain was isolated from sewerage of a furniture factory. Isolate strain was identified based on the morphological and phylogenetic analyses. Formaldehyde-degrading fun- gus was determined by characterizing the mycelia growth in culture media, formaldehyde-resistant, formaldehyde- degrading efficiencies, and specific enzyme activity involved in formaldehyde removal. Isolate strain HUA was identified as a member of Aspergillus sydowii. The strain HUA showed a growth in the presence of formaldehyde up to 2,400 mg l -1 at an optimum temperature of 25 C and optimum pH of 7. The specific activity of formaldehyde dehydrogenase and formate dehydrogenase could reach up to 5.02 and 1.06 U mg -1 , respectively. It indicated that
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