1. If the average slaughter weight of each pig is 250kg, then according to the market price per catty 10 yuan, a pig can sell for about 2,500 yuan, which is about 1200- 1500 yuan after deducting the cost and profit, and the annual profit of 12 pigs is about 654,300.

2. The specific profit is related to many factors, such as the weight, variety and quality of pigs and the fluctuation of local market prices. Judging from the current trend of raising pigs, the price of live pigs on the market is still rising, and it can be sold at a good price.

3. With the development of society, people pay more and more attention to food safety, and the demand for high-quality and safe pork is getting stronger and stronger. Pig farming has also begun to develop into ecological farming and ecological pig farm construction.

4. It is the essential choice of pig industry to take the road of sustainable ecological pig raising and reduce the pollution of pig farms. In recent years, the state has issued relevant policies to promote biogas digesters and achieved good results.