Abstract:Intensive farming produces a large amount of dairy manure every day. The prestorage process of resource utilization is easy to produce ammonia gas and greenhouse gas due to local anaerobic areas, which caused the loss of nitrogen and environmental pollution. The functional membrane with selective permeability was used as the covering material and coupled with the microaerobic environment, and the dynamic changes of storage materials were analyzed to explore the feasibility of micro-aerobic coupling membrane technology for storage stability of dairy manure and gas emission reduction. Dairy manure was used as experimental materials, and membrane with selective permeability was used as covering material, the storage trial was carried out in an intelligent lab-scale membranecovered aerobic composting reactor system for 30 d. There were membrane-covered treatment and control treatment in this trial. To make the internal oxygen concentration between 4% and 6%, the oxygen concentration in the reactor was controlled by the feedback regulation mode through the pipe at the bottom of the reactor. Physicochemical indicators, biological indicators and main gases emission were monitored and analyzed in the storage process. The results showed that the microaerobic coupling membrane technology was more conducive to storage stability compared with conventional storage. And the effect of gas emission reduction was significant. Compared with the control group, the ammonia gas emission was decreased by 14.4%, and the total greenhouse gas emission was decreased by 25.58% in the membrane-covered group.