U.S. EPA PROJECT XL: YOLO COUNTY'S ACCELERATED ANAEROBIC AND AEROBIC COMPOSTING (FULL-SCALE CONTROLLED LANDFILL BIOREACTOR) PROJECT

摘要

The County of Yolo Planning and Public Works Department (Yolo County), will operate its next 20-acre landfill module near Davis, California as a controlled bioreactor landfill to attain and demonstrate a number of environmental and cost savings benefits in a full-scale landfill operation. As part of this project, Yolo County is requesting that the EPA grant regulatory flexibility from the Resource Conservation Recovery Act (RCRA) prohibition in 40 CFR 258.28 regarding Liquid Restrictions, which may preclude addition of useful bulk or non-containerized liquid amendments. Yolo County is also requesting flexibility in state regulatory requirements for bottom linings based on project performance, available controls, and environmental safeguards which have been demonstrated in their smaller-scale 9000-ton test program at the Yolo County Central Landfill. In the first phase of this 20-acre project, a 12-acre module has been constructed. This 12-acre module contains one 9.5-acre cell, which will be operated anaerobically, and a 2.5-acre cell aerobically. Co-sponsors of the project with Yolo County are the Solid Waste Association of North America (SWANA) and Institute for Environmental Management (IEM, Inc.). The County is proposing to supplement the liquid addition with groundwater and leachate, but would like to obtain the flexibility to possibly utilize other liquids such as gray-water from a waste water treatment plant, septic waste and food-processing wastes that are currently land applied. Liquid wastes such as these, that normally have no beneficial use, may instead beneficially enhance the biodegradation of solid waste in a landfill for this project.