According to the scale of breeding and the need for pollution prevention and control, the necessary facilities that need to be built in breeding farms are as follows: 1. Build corresponding livestock and poultry manure, sewage, and rainwater diversion facilities; 2. Storage facilities for livestock and poultry manure and sewage; 3.Comprehensive utilization and harmless treatment facilities such as anaerobic digestion and composting of manure and sewage, organic fertilizer processing, biogas production, separation and transportation of biogas residue and liquid, sewage treatment, and livestock and poultry carcass treatment. 4.If you have entrusted others to comprehensively utilize and harmlessly treat livestock and poultry breeding waste, you do not need to build comprehensive utilization and harmless treatment facilities on your own.