封场20年垃圾山开挖 深圳为城市更新根治“顽疾”

Core Viewpoint - The article discusses the unprecedented "urban scar repair surgery" taking place in Shenzhen's Luohu district, focusing on the Yulong landfill environmental restoration project, which is the largest full-scale excavation and garbage relocation project in China to date [1][7][21]. Group 1: Project Overview - The Yulong landfill, operational from 1983 to 1997 and closed since 2005, contains approximately 2.5 million cubic meters of waste, equivalent to filling 1,000 Olympic-sized swimming pools [7][9]. - The project aims to excavate around 4.1 million tons of waste by September 2026, with the current excavation depth reaching nearly 30 meters [5][12]. Group 2: Environmental Management - To mitigate odors and dust during excavation, the project employs a comprehensive HDPE membrane covering and a "new air system" that injects fresh air while extracting methane gas from the landfill [6][9]. - The project utilizes advanced screening technology, capable of processing 6,000 tons of waste daily, to sort materials into three categories: humus soil, lightweight materials, and inorganic aggregates [12][13]. Group 3: Waste Treatment and Resource Recovery - The lightweight materials are sent to waste-to-energy plants for incineration, while inorganic aggregates are repurposed, and humus soil is disposed of safely [13][18]. - The incineration process is designed to minimize toxic emissions, with stringent temperature controls ensuring that dioxins are effectively decomposed [16][18]. Group 4: Urban Renewal and Future Development - The project is part of a broader urban renewal strategy, aiming to transform the excavated land into valuable resources for emerging industries such as artificial intelligence and digital economy [20][23]. - The initiative represents a shift from passive environmental management to proactive remediation, establishing a model for sustainable urban development that integrates environmental restoration with future land use [21][23].