3/27/2023 0 Comments Minitube alternativeTo better examine the efficiency and effectiveness of pipe perforation in an LFG collection system, three different LFG collector perforation designs were tested and monitored in the same 800-foot trench at Cedar Hills Regional Landfill, located in Maple Valley, WA. 6 Tips for Excellence in Landfill Operations. Download it now! We’ve created a handy infographic featuring 6 tips to improve landfill management and achieve excellence in operations. Managing municipal solid waste is more than landfilling: publicity, education, engineering, long-term planning, and landfill gas waste-to-energy are specialties needed in today’s complex environment. Any excessive increase in vacuum zone of influence in the upper lifts of the landfill may lead to air intrusion, a primary safety hazard for landfill operators, and any excessive decrease in zone of influence may lead to an increase in the number of LFG collectors for adequate redundancy, which in turn reduces landfill air space utilization for refuse disposal. To maximize the landfill air space capacity, most landfill engineers design LFG collectors with maximum capturing zone of influence while matching the rate of LFG collection to that of the LFG generation. While LFG flow rate and vacuum zone of influence are adjustable through aboveground control valves located on each collector head, the effectiveness and efficiency of an LFG collection system and vacuum zone of influence are locked in subsurface collectors’ perforation size.įurthermore, landfill airspace capacity is best spent for the disposal of municipal refuse, but the reality of most municipal landfills is that the horizontal and vertical LFG collectors can easily exceed several miles of piping and backfill materials, reducing valuable landfill airspace utilization. Unfortunately, the laws of fluid mechanics places flow rates inversely proportional to vacuum zone of influence, and there lies the biggest challenge to LFG engineers. To collect all landfill gas (LFG) that microbes generate in a municipal landfill, it would be ideal if LFG collection (flow) rate could be directly proportional to vacuum zone of influence.
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