Cow Dung as a Renewable Bioresource: Recent Advances and Emerging Applications

Abstract

Cow dung, a natural excrement of bovine species, has been utilized for centuries in agriculture, medicine, and household practices due to its abundant organic content and bioactive properties. In recent years, scientific investigations have re-established cow dung as a multifunctional bioresource with wide-ranging industrial, environmental, and biotechnological applications. Rich in macronutrients such as nitrogen, phosphorus, and potassium, along with trace elements like calcium, magnesium, zinc, and copper, cow dung serves as a potent substrate for microbial growth and soil enrichment. It contains diverse microbial flora, including Bacillus, Pseudomonas, and Actinobacteria species, which play a vital role in biodegradation, composting, and nutrient cycling. The bioconversion potential of cow dung extends to the production of biogas, biofertilizers, biopesticides, and renewable nanomaterials, making it a cornerstone of sustainable and circular bioeconomy models. Its antimicrobial, antifungal, and antiinflammatory activities have also attracted attention in pharmacological research, where it serves as a source of natural therapeutic agents. Furthermore, cow-dung-based bio-slurries have demonstrated potential in heavy metal remediation, wastewater treatment, and carbon sequestration, thereby addressing critical issues of pollution and resource depletion. Recent advancements have also explored its use as a low-cost culture medium for microbial growth, replacing conventional synthetic media while maintaining comparable efficiency. This highlights cow dung’s role as a renewable, biodegradable, and economically viable alternative in microbiological and biotechnological research. Overall, the utilization of cow dung transcends traditional applications, contributing to agricultural sustainability, environmental protection, and innovative material development. Its holistic potential reinforces the importance of integrating traditional ecological knowledge with modern scientific approaches for a greener and more sustainable future.