The in-demand series returns for another season! CEC’s experts break down subjects impacting today’s solid waste operations. We’ll dive deep into topics like landfill stability, leachate treatment, landfill gas O&M, organics management, and transactional due diligence. These FREE webinars occur every Tuesday, at 1pm EDT, starting July 13 and running through August 24.
Access registration by clicking on course title.
July 13, 2021 | Organics Management 101
July 20, 2021 | Liquids and Landfill Stability
July 27, 2021 | Membrane Technologies in Leachate Treatment
August 3, 2021 | Proper Forcemain Design
August 10, 2021 | Gas O & M – Pump Maintenance and Cleaning
August 17, 2021 | Well Field Optimization Using Data
August 24, 2021 | Do’s & Don’ts of Transactional Due Diligence
Organics Management 101
Presented by Ivan Cooper
The biodegradable organic fraction of Municipal Solid Waste, often considered to be food wastes and yard trimmings, can exceed 40% of a waste stream. The organics fraction can also include paper, manure, textiles, rubber, diapers, and carpet. Diversion from landfill disposal can create benefits, including reduced methane emission (reducing greenhouse gases), decreased leachate volumes, and production of compost and renewable energy. There are proven approaches to organics processing, from composting food scraps and leaf and yard wastes to anaerobic digestion treatment. We will discuss regulatory and societal drivers, processing technologies, biogas utilization, facility design, odor control, compost considerations and lessons learned in this overview session. Several case examples will be presented, highlighting these issues.
Liquids and Landfill Stability
Presented by Michael Yacyshyn, Eric Chiado, and Tim Mitchell
Accumulation of liquids in a landfill can effect landfill stability. Management of liquids in a landfill is traditionally limited to the operation and maintenance of the leachate collection and removal system (LCRS) to remove free liquids that drain vertically through the waste mass. However, some liquids can accumulate in the waste mass and be impeded to flowing to the LCRS due to: excessive stormwater infiltration, varying waste permeability, inconsistent flow patterns, groundwater intrusion into unlined upgradient cells in canyon fills, or varying waste compositions (i.e. wet waste). Methods to analyze and mitigate the impacts of high landfill liquid levels will be presented.
Membrane Technologies in Leachate Treatment
Presented by Greg Werner
Leachate and other landfill-generated liquids (gas condensate and dewatering liquids) can be some of the most challenging industrial wastewaters to manage and treat. Organics and ammonia typically present in leachate commonly requires biological systems be employed as primary or secondary treatment. Due to the highly concentrated nature of leachate and typical floc formation, conventional clarification methods struggle to provide the solids separation required to meet typical effluent limitations. Effluent limitations on other non-biodegradable persistent compounds may also drive the need for alternative treatment methods. Membrane technologies are often integrated into the leachate treatment scheme to provide adequate biosolids filtration and other key compound removal. We will explore the different membrane technologies typically used in leachate treatment including ultrafiltration, nanofiltration, and reverse osmosis. The discussion will include a breakdown of how each membrane technology may be utilized and its limitations. A case study will be presented on how membrane technologies have been implemented in treating multiple leachate constituents.
Proper Forcemain Design
Presented by Greg Werner
Leachate and other landfill-generated liquids (gas condensate and dewatering liquids) are generated over the entire landfill footprint. Due to the progression of landfill cell construction, the design of sideslope or gravity leachate collection systems may require locating the collection point a substantial distance from the centralized storage, treatment or discharge location. This often results in constructing a forcemain to pump the leachate and other landfill liquids long distances. In addition, different liquid sources exhibit different fluid characteristics that need to be considered in appropriate forcemain design. This session will explore the appropriate steps to consider in forcemain design and pump selection. Discussion topics will include: fluid properties, service conditions, forcemain material selection, pump performance conditions including TDH and NPSH, proper pump selection, in-line item selection, and controls and automation. A case study and practical application will be presented.
Gas O&M – Pump Maintenance and Cleaning
Presented by Corey Schreck and Chris Sliger
A Robust Gas Collection System O&M program is imperative for a healthy and compliant landfill. Dewatering the landfill gas wells is an integral part of that O&M program, but data collection pertaining to this portion of the program is often overlooked. This presentation will provide an overview of some of the O&M procedures that can provide valuable data in regards to maintaining equipment life and status, and will also discuss electronic recordkeeping methods used to collect the associated data.
Well Field Optimization Using Data
Presented by Brian Wolf and Chris Sliger
Collecting data and quantifying the performance of a landfill dewatering system in a wellfield can be a challenging and time-consuming endeavor. This discussion will present some tools that make collecting the data efficient, thorough, and trackable. In particular, this discussion will focus on quantifying liquid levels and tracking dewatering efforts at “wet” landfills.
Do’s & Don’ts of Transactional Due Diligence
Presented by Adam Mehevec, Tony Pelletier, and Ryan Dunning
This presentation will cover CEC’s process for evaluating the environmental liability, operational conditions, and financial viability of potential acquisitions of hauling companies, transfer stations, MRFs, and landfills. We will also cover the post-transaction activities such as permit transfers, modifications, and life of site infrastructure budgeting, which CEC can assist with.