ANCHORAGE, AK - Leachate treatment management at the Anchorage Regional Landfill has been a growing challenge as the landfill has matured. A study by the Anchorage Solid Waste Services Department ensued.
After years of research, Fluidyne was called in to provide a jet aeration/mixing system for the use at two lagoons at the Anchorage Regional Landfill in Alaska. There are 2 phases of the construction project. Phase I included a start-up of the new larger lagoon in the Summer of 2024 with Phase II upgrading an existing smaller lagoon that will be started up in the Summer of 2025.
The project consists of jet mixing/aeration headers with in-basin liquid piping, air piping, supports, couplings, hardware, submersible jet mixing pumps, positive displacement blowers with full sound enclosures and field services. The larger lagoon consists of two jet aeration and mixing manifolds running the length of the floor of the lagoon with each driven by a 34 HP jet mixing pump. The smaller lagoon consists of one jet aeration and mixing manifold driven by one 34 HP jet mixing pump. An in-place back up pump is also provided for the smaller lagoon.
The jet aeration equipment was sized based on providing sufficient oxygen through both lagoons at the mid-depth point depth while providing proper mixing when operating at reduced air flow rates. Three (3) 40 HP Positive Displacement Blowers (one blower is a 100% in-place back-up) provide the required oxygen to both lagoons. Performance is based on the loading rate at any time being proportionally divided between the two lagoons.
The updates and installations should set them up for future needs and less trouble along the way.