Feather Degrading Fungi: Isolation, Identification and Measuring the Proteolytic Activity Using Solid-State Fermentation Technique

Abstract

The rapid growth of the poultry industry has been associated with an increase in the production of keratincontaining residues (feathers are most abundant). Keratinolytic microorganisms have become biotechnologically important since they target the hydrolysis of highly rigid keratin. The main aim of the recent study was to isolate Aspergilli that have a keratinolytic activity. The keratinolytic fungi were isolated from three different places containing keratinous wastes. For cultivating these organisms, a solid-state fermentation (SSF) media was used containing feather as the only source of carbon and nitrogen. Then, we used Potato dextrose agar (PDA) media for purification and identification of isolates, by studying their culture and microscopic characteristics. Based on our results, we obtained four keratinolytic fungal species; namely, Aspergillus terreus, Aspergillus nidulans, Aspergillus niger, and Aspergillus fumigatus. The total protein content in the

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“…Solid waste has a bad impact on public health and the environment (Birara & Kassahun 2018 ; Derhab et al 2022 ; Elkhwesky 2022 ). The uncollected liquid and solid waste could cause infectious diseases and pollution of air, water, and soil (Bagire et al 2021 ).…”

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