Mitigation technologies for organized emissions of ammonia and greenhouse gas from livestock farms

The end treatment technology for ammonia and greenhouse gas emissions (NH₃, N₂O, CH₄) from livestock farms has received widespread attention and continuous research from scholars both domestically and internationally in recent years. However, the gas emission patterns and priorities of control in different livestock manure management stages are still unclear. A comprehensive comparison of treatment effects, costs, and applicable scenarios of different treatment technologies are uncertain, lacking a technical system for multi gas reduction. Therefore, this study systematically reviewed the published literatures and used data mining methods to analyze the gas emission characteristics, priority characteristics, emission reduction technologies, and application potential of the livestock house, solid manure storage, liquid manure storage, and solid manure composting processes of pig, chicken, cattle, and sheep manure management. The emission reduction technology characteristics that match the gas emissions priority were summarized. The emission reduction technologies for NH₃, N₂O, and CH₄ were discussed. The various technical principles and potential effects of NH₃, N₂O, and CH₄ emission reduction were discussed, and the priority and potential technical approaches for gas resistance control in various stages of manure pollution management process were explored. These works could provide support for the combination and design of different technologies for the treatment of tail gas discharged from livestock farms to achieve the goal of reducing ammonia and greenhouse gas emissions. Pointing to the shortcomings of existing end treatment technologies, this study looked forward to the research direction of NH₃, N₂O, and CH₄ end treatment technology, aiming to provide a basis for the design of tail gas treatment processes and future technology research and development in livestock farms.