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Waste management (WM) has received increasing attention in recent years in micro, small, and medium-sized enterprises (MSMEs). However, a comprehensive understanding of the WM research in MSMEs from different economic sectors is somehow absent in spite of its proliferation. The current review was conducted to indicate types of waste, hazards associated with waste, as well as strategies, antecedents (facilitators and barriers), and outcomes of WM in MSMEs from diverse economic sectors. The search was performed by using the Web of Science (WoS) database, which retrieves 420 articles. After excluding the papers that were not closely related to the topic, 84 articles were retained for an in-depth analysis, spanning a period of five years (from 2018 to June 2022). This review demonstrates that the types of waste generated from MSMEs include metals, plastics, chemicals, papers, wood, fabrics, stones, food, ceramics, glass, candles, and cooking oil, among others. It is also resulted that the hazards associated with waste include environmental pollution, CO 2 emissions, human diseases, health disasters, and marine life destruction. Examples of the WM strategies in MSMEs research are recycling, separating, sorting, reusing, and composting waste. The findings revealed that a lack of financial resources, knowledge, experience, education, and training are some barriers encountered by MSMEs in WM. Enhancing financial performance, economic growth, competitive advantage, and sustainable development are important outcomes of WM in MSMEs. There has been a paucity of research on MSMEs WM, necessitating a thorough investigation of several issues. This research discusses implications and recommendations and presents avenues for future research. The current paper is one of the first studies to conduct a systematic review of WM in MSMEs from different economic sectors.

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