The farm of Wu 'an Zhishouyuan Forestry and Animal Husbandry Co., Ltd. is located 2 kilometers north of Yeung Yi Street, Yeung Yi Town, Wu 'an City. It is built on the hillside wasteland, surrounded by mountains on three sides, naturally isolated and semi-closed. According to the design concept of "high starting point planning, high standard design and high quality construction", the company plans to invest 1. 1 billion yuan to build three relatively independent breeding pig farms with a total area of 300 mu, with an annual output of 60,000 high-quality breeding pigs and pollution-free commercial pigs. The first phase of the project covers an area of 100 mu, with a planned investment of 35 million yuan and an annual slaughter scale of 20,000 heads. At present, the investment of160,000 yuan has been completed, and 24 environmentally-friendly and energy-saving pig houses (10000 square meters), 24 200-cubic-meter biogas digesters, 24 fire paths for ground fire heating, a feed processing workshop 1000 square meters and an office building of 300 square meters have been built. Architectural design pays attention to the concept of healthy breeding and sustainable development, and integrates "environmental protection, energy saving and ecology", which has the following four characteristics. First, the pigsty has a long span. Using hyperbolic dome structure, the widest span of pigsty can reach 1 1.96 m, which not only saves cost, but also facilitates modern management and structural layout. Second, the heat preservation effect is good. The wall is made of baking-free brick and 5cm insulation board, and the top is made of 25cm water slag insulation structure, which achieves ideal thermal insulation effect, and the temperature difference between indoor and outdoor in summer can reach above 7℃. Third, the construction of ground fire-fighting facilities uses straw curing heating to save energy. Each pigsty is equipped with corresponding fire heating facilities, straw briquetting is used to replace raw coal, and straw curing equipment is used. 400 tons of high-quality raw coal can be saved every year, and 800 tons of straw can be used to solve the problem of straw burning in 800 mu of farmland and prevent environmental pollution; The fourth is to realize the comprehensive utilization of biogas and promote the construction of new countryside. Build a biogas digester under the pigsty to realize biogas construction and ground fire heating in one. Through ground fire heating, biogas digesters can be fermented at medium temperature, and the gas production is 1.5 times that of normal temperature fermentation, which completely solves the problem of low gas production in biogas digesters in northern winter. Through "biogas networking", 0/000 households in Yeung Yi North Street/KLOC can bid farewell to the "coal-burning era" and use clean energy; Biogas slurry and biogas residue can make the surrounding 6.5438+0 million mu of fruit trees bid farewell to pesticides and fertilizers, realize pollution-free production and promote the construction of new countryside.