Trends in the management of organic swine farm waste by composting: A systematic review

Trends in the management of organic swine farm waste by composting: A systematicreviewPig farming contributes to the economic development of nations and supplies humanfood demand; however, it generates a large amount of organic waste which, if notmanaged properly, becomes a risk to the environment and human and animal health.Considering the relevance of composting and its usefulness for the use of waste, thisstudy aimed to determine the global trends in the management of composting manure,mortality and other organic waste produced on pig farms over the last five years (2017-2022). Systematic search involved four databases: ISI Web of Science, Scopus, Ebscoand Scielo. Of the total findings, 56 articles were included in the review, furtherclassified into 14 categories for their respective analysis: co-substrates/additives,microbial communities, antibiotic resistance, heavy metals, polycyclic aromatichydrocarbons, microbiological/parasitological quality, phytopathogens, nitrogentransformation, bioinoculants, comparison/combination with other waste managementtechniques, factors affecting composting, swine mortality and plant growthpromotion/phytotoxicity. The review exemplified the importance of swine mortalitycomposting as an alternative for organic matter management in pig farms, consideringthat the process also includes manure, vegetable waste and wood chips, amongothers. Controlled factors throughout the process are a requirement to obtain a stableproduct with physicochemical and microbiological quality that complies with nationaland international regulations and that will be useful and safe for application on crops,ensuring environmental, animal, and human health.HELIYON-D-23-02523R}