“无废城市”的能源密码：如何用畜粪炼成船舶“绿能”?

Group 1 - The core viewpoint of the articles highlights the transformation of waste into energy through the implementation of biogas purification technology at the Songlin pig farm in Shanghai, which is the largest scale pig farm in the city [1][2] - The pig farm generates over 45,000 pigs annually and has faced challenges in waste management, which have been addressed through anaerobic fermentation to produce biogas for energy needs [1] - The biogas purification project, initiated by Sheneng Environment, converts biogas into biomethane, which is then used as a green methanol fuel for ships, showcasing a successful waste-to-energy model [1][2] Group 2 - The byproduct of carbon dioxide from the biomethane production process is utilized in a nearby microalgae cultivation base, producing several tons of microalgae liquid annually for animal feed and health products [2] - A second phase of the biomass utilization demonstration base is set to begin in 2025, focusing on cow manure and vegetable waste, replicating the successful model established at the pig farm [2] - Shanghai is positioned as a pioneer in the development of biomass energy systems, actively addressing technological challenges and exploring sustainable development pathways for large urban areas [3]