1 Design of sewage pipeline 1.1 Design principles of sewage pipeline One must be conducive to the prevention of pig farms, clean, clean and hygienic. No fouling is left, which is beneficial to the reduction of feces. Second, it is necessary to separate rain and sewage, dry and wet separation, and separation of human pigs. Third, it is beneficial to feeding personnel and cleaning manure. Fourth, to run smoothly is not easy to block, easy to clear and repair. 1.2 Design of defecation ditch, urination ditch, rain ditch 1.2.1 Easy mode. Each column has a hole of 35cm in length and 10cm in height, connected to the urinary drainage groove at the bottom of the outer wall. At the bottom of the outer wall, there is a cement urination ditch with a width of 10cm, a height of 20cm and an inclination of 3% to 5%. The urination ditch is connected with the sedimentation tank, and the sedimentation tank is arranged at the lower end of the pen. 1.2.2 Pipeline mode. Drainage in small and medium-sized farms is best designed in a pipeline mode so that rain and sewage can be separated. That is, roof rainwater is collected using a gutter (connected with a half plastic pipe) and discharged directly from Mingdao. The slatted floor design is adopted. The sewage goes through the dark (tube) channel and is connected to a collection pond (sedimentation tank), so as to achieve separation of rain and sewage, and to lower the sewage disposal cost. 2 Innocent treatment of manure waste water 2.1 Design Standard Designed emission standards to implement the Pollution Discharge Standard for Livestock and Poultry Breeding, namely: CODcr=400mg/L, BOD5=150mg/L, SS=200mg/L, NH3-N=80mg/L, Total Phosphorus (calculated as P) = 8mg/L. 2.2 Design Principles The treatment process must be mature and reliable to ensure that the quality of the effluent meets the discharge standards and guarantee long-term stable operation. The medium-sized farms must adopt advanced equipment. Technical and economical, with low investment and low operating costs. The most ideal way is to strive for the national standard construction project of hog breeding. The biogas slurry is used for ecological recycling. 2.3 Introduction of several currently popular harmless methods One is the biogas tank fermentation process, and the other is the bioactive litter pig-fermentation bed process. Third, simultaneous fermentation of feces and sewage, high-temperature fermentation, the fourth is the use of biotechnology and chemical treatment of a biochemical treatment, the fifth is the dry reduction method. 2.4 Introducing a Simple and Harmless Treatment Solution Small and medium-sized pig farms, especially small-scale pig farms, have relatively low benefits and serious shortages of input. It is difficult for them to invest their own funds to design harmless treatment facilities in accordance with the Pollution Discharge Standard for Livestock and Poultry Farming. It is imperative for them to do some simple and harmless treatment facilities and minimize pollution levels. It is also the only method available. The author concludes that in recent years the implementation of the "three pools" in small and medium-sized pig farms has restricted the scale of farming and can effectively regulate aquaculture pollution. Although this law cannot meet the "pollution discharge standards for livestock and poultry farming", it is economical and practical. It can greatly reduce the organic matter concentration and ammonia nitrogen content in the pig farm wastewater and reduce the pollution of the culture. Purify the surrounding sanitation and have good social benefits. The brief introduction is as follows: 1. According to the absorption ability of the farmland, limit the breeding scale for each animal farm. 2. The use of artificial picking process, the introduction of simple quantitative emissions, rain and sewage separation. 3. Implement the "three-pool" manure storage pool, fermentation (precipitation) pool and biological purification pool construction. That is, the excrement is not allowed to be stacked in the open air, cement pools are built and piled up and fermented. The urine waste water is separated into the fermentation (sedimentation) tank by dry and wet separation (filtration). After sedimentation and fermentation, the urine waste water is discharged into the biological purification tank (tank), and then discharged after biological purification or artificial wetland absorption. 3 design instructions The sewage discharge is calculated as 10kg per pig per day. The sewage is fermented for 15 days in the sedimentation tank. The precipitated fermented sewage is rich in hydrocarbons, nitrogen, phosphorus and other organic substances, and is naturally absorbed by the biological purification pond (tang). , can reduce environmental pressure. In biological purification ponds (tangs), upper-level fish and aquatic plants can be stocked, and can also be discharged after treatment in wetlands. Biogas digesters: The biogas digesters can be designed and constructed with no less than one cubic meter of production sow. Faecal treatment: Excretion of excreta is carried out. The excrement cannot be piled up in the open air, and the cement pool is used for stacking. After fermentation, the organic fertilizer is returned to the field. Wuxi ASK Pneumatic Machinery Co.,Ltd , https://www.askpneumtic.com