“无废城市”的能源密码：如何用畜粪炼成船舶“绿能”？

Core Insights - The article discusses the transformation of livestock waste into green energy, specifically focusing on a large-scale pig farm in Shanghai that converts pig manure into biogas and ultimately into green methanol for shipping fuel [1][3]. Group 1: Project Overview - The pig farm, located in Shanghai's Jinshan District, has an annual stock of over 45,000 pigs, making it the largest of its kind in the city [1]. - The biogas produced from anaerobic fermentation of pig manure is primarily used for electricity and heating at the farm, with excess biogas previously being flared off, leading to resource waste and environmental concerns [1][3]. Group 2: Technological Implementation - A systematic upgrade has been implemented to purify the biogas into biomethane, which is then converted into green methanol for use as ship fuel, marking a significant shift from waste to energy [1][3]. - As of September this year, approximately 500,000 cubic meters of biomethane have been integrated into Shanghai's gas network, serving as a core raw material for a 100,000-ton green methanol project [3]. Group 3: Future Developments - A second phase of the biomass utilization project is set to begin in 2025, focusing on a nearby dairy farm that will utilize cow manure and vegetable waste, replicating the successful model established at the pig farm [4]. - The project aims to extend the industrial chain and explore new technologies and models for anaerobic fermentation of agricultural waste, indicating a broader potential for biomass energy development [4]. Group 4: Industry Context - The global exploration of biomass energy is accelerating, with Shanghai positioned as a pioneer in developing biogas systems, despite not being a major agricultural province [4]. - The initiative not only addresses waste management but also seeks to establish a sustainable development pathway for large urban areas [4].