MBR (membrane bioreactor) wastewater treatment plant

The MBR (membrane bioreactor) wastewater treatment plant in Vihdin Vesi, Nummela, was supplied by Artas to the municipality of Vihti. The MBR process was developed to improve wastewater treatment in the region and ensure greater efficiency and environmental friendliness (previously, the municipality had used the conventional activated sludge process). The plant has been in operation since 2019.

The plant has a capacity of 3 m³ per day and also provides improved nitrogen removal.

The Vihdin Vesi wastewater treatment plant in Nummela is part of a comprehensive project to improve wastewater treatment in the region. Here are some of the alternatives that were considered as part of the "Vihdin jätevesihuollon vaihtoehdot" project:

  1. Centralization of wastewater treatment: One option is to centralize wastewater treatment at the Nummela wastewater treatment plant. This would mean that wastewater from different parts of the municipality would be directed to a central plant for treatment.
  2. Directing wastewater to Espoo: Another option is to direct the wastewater to the wastewater treatment plant in Espoo. This option is being considered in order to address the capacity issues and condition of the existing facilities in Vihdin. Modernization of existing facilities: Another alternative is to modernize and expand the existing wastewater treatment plants in Kirkonkylä and Nummela. This would improve the efficiency and capacity of the existing infrastructure.
  3. Environmental impact assessment (EIA): All alternatives will undergo an environmental impact assessment to find the best solution for the environment and the population.

These options aim to optimize wastewater treatment in Vihdin and ensure that the facilities meet future requirements.

The Vihdin Vesi wastewater treatment plant in Nummela was built and expanded to meet several important requirements:

  1. Population growth: The Vihti region has experienced significant population growth in recent years. This has led to an increased need for efficient wastewater treatment to cope with the rising volumes of wastewater.
  2. Environmental protection: Stricter environmental regulations and the need to protect water quality in surrounding waterways made it necessary to modernize and expand the existing wastewater infrastructure.
  3. Technological improvements: The introduction of modern technologies such as membrane bioreactors (MBR) enables more efficient and environmentally friendly wastewater treatment. These technologies help to improve nitrogen and phosphorus removal and increase the overall performance of the plant.
  4. Future-proofing: The expansion and modernization of the wastewater treatment plant will ensure that the infrastructure continues to meet future requirements and can respond flexibly to further changes.