Research Progress on Air Pollutant Emission and Control of Livestock Manure Compost

Domestic and foreign literature researches were carried out on emission characteristics and control of air pollutants in aerobic composting of livestock and poultry manure．In aerobic composting of livestock manure, greenhouse gases such as CH₄, N₂O, and CO₂ and malodorous gases such as NH₃, H₂S, and VOCs are generated．Among them, CH₄, N₂O, and NH₃ are main air pollutants emitted during composting process．The emission of air pollutants in composting process is mainly affected by raw materials, composting methods, and oxygen content．Source control technology and end exhaust gas control technology could achieve effective emission reduction of air pollutants in composting process．Source control technology mainly achieves source reduction of pollutants by optimizing composting process and adding additives．The end exhaust gas control technology mainly uses biological methods, chemical washing methods, adsorption methods, etc．to achieve an effective removal of gases pollutants．On the basis of literature research, the ＂source control + end treatment＂ composting air pollutant whole process control technology route was proposed．