山东宁阳：牧场里的“循环账”

Group 1 - The core idea of the article is the innovative waste management practices implemented by Shandong Shengli Animal Husbandry Co., Ltd., which transforms livestock waste into valuable resources, enhancing both environmental sustainability and economic efficiency [1][2][3] Group 2 - The farm houses over 3,800 dairy cows, producing more than 70 tons of fresh milk daily, while generating approximately 30 kilograms of manure per adult cow each day [1] - The farm utilizes automated manure cleaning equipment to minimize odor and processes the manure through a series of fermentation beds, resulting in odorless, fluffy bedding material after 12 to 15 days of anaerobic fermentation [1][2] - The anaerobic fermentation of liquid manure generates biogas, producing between 1,500 to 2,200 degrees of electricity daily, which powers 144 large fans to cool the cows [2] - The farm processes about 1,600 cubic meters of solid manure monthly, saving nearly 600,000 yuan annually on bedding material, while producing 700,000 cubic meters of biogas and over 500,000 degrees of electricity each year [2] - The treated liquid manure is used as organic fertilizer on over 2,800 acres of land, improving soil quality and creating a sustainable agricultural ecosystem [2][3] - The farm's waste management model exemplifies the concept that waste can be a resource when managed correctly, forming a closed-loop system of "cattle raising - waste - energy - fertilizer - planting" [2][3]