Ejby Mølle is the largest wastewater treatment plant operated by VCS Denmark, a prominent Danish water and wastewater utility company. Located in Odense, the third-largest city in Denmark, the plant has a treatment capacity for 385,000 person equivalents (PE) and is a technological leader in energy efficiency and sustainability.
Key Features and Achievements:
Energy Independence: The Ejby Mølle plant has transformed from a major consumer of electricity to a net producer, generating more energy than it consumes. This was achieved through the “Beyond Energy Neutrality” program, which includes optimizing the existing infrastructure, enhancing nutrient reuse, and maximizing biogas extraction to produce electricity and heat.
Technological Innovations: The plant employs several innovative technologies, such as ammonia-based aeration control for biological nutrient removal, continuous measurement of nitrous oxide emissions, and advanced granular sidestream deammonification processes. These technologies help minimize emissions and improve treatment efficiency.
Sustainability: VCS Denmark emphasizes sustainability and has achieved a 77% level of energy self-sufficiency through its initiatives. The plant uses sludge to produce biogas, which is then converted into heat and electricity. The surplus heat produced is sold to the regional district heating utility.
Environmental Impact: The Ejby Mølle plant adheres to stringent nutrient limits in its discharge into local water bodies, ensuring minimal environmental impact. It also features multiple treatment units, including mechanical treatment, activated sludge, trickling filters for stormwater, sand filters, and sludge dewatering units.
Company Overview:
Name: VCS Denmark
Headquarters: Odense, Denmark
Established: 1853
Ownership: Independent limited company owned by the municipalities of Odense and Northfunen.
Operations: Manages 5 waterworks, 8 wastewater treatment plants, and a 3700 km pipeline network.
Contact Information:
Address: Vandværksvej 7, DK-5000 Odense, Denmark
Project Director: Thomas Abildgaard Jørgensen. Phone: +45 40 62 58 31).
The Ejby Mølle plant stands as a model for sustainable water resource recovery, showcasing how wastewater can be transformed into valuable energy resources.
Website: https://www.vcsdenmark.com/
