Nereda design capacity

  • 14000 m3/d
    Dry Weather Flow
  • 1872 m3/h
    Peak Flow
  • 65000 PE
    PE (PE = 60 gBOD/d)

Project facts

  • Client
    ARA Sarneraatal
  • Licensee
    WABAG
  • Location
    Alpnach, Switzerland
  • Period
    2017
  • Wastewater
    Municipal
  • Project type
    Greenfield 
  • Process configuration
    Pre-treatment + Primary settler + Nereda

About the Alpnach Nereda WWTP

Nereda technology was selected for the extension of the Alpnach Wastewater Treatment Plant in Switzerland. The innovative aerobic granular biomass technology provides an optimal and cost-effective solution to treat the wastewater as an alternative to conventional systems. The Nereda installation in Alpnach is the first Nereda in Switzerland.

Switzerland - Alpnach | Royal HaskoningDHV

The challenge

Alpnach Wastewater Treatment Plant in Switzerland was looking for a solution to expand its current treatment plant. 

The solution

Nereda technology was selected for the extension of the Alpnach Wastewater Treatment Plant in Switzerland. The innovative aerobic granular biomass technology provides an optimal and cost-effective solution to treat the wastewater as an alternative to conventional systems.

The Nereda installation in Alpnach is the first Nereda in Switzerland. The extension of the Alpnach WWTP was tendered based on conventional SBR technology but WABAG Water Technology Switzerland – who signed a 10 year Cooperation Agreement with Royal HaskoningDHV in November 2014 to deliver Nereda to Switzerland – also evaluated the possibilities and advantages of the Nereda technology.

The outcome

After start-up in 2017 Alpnach WWTP is treating a municipal and industrial effluent load of 49,000 p.e. (or 65,000 p.e. in accordance with Swiss calculations), with a daily average flow of 14,000 m3/day and a peak flow of 1,872 m3/hour. The Nereda installation is based on a configuration of one buffer tank and three Nereda reactors.

The advantages of Nereda are convincing: a reduced footprint (-34%) and volume (-40%), and higher nitrogen removal in spite of the reduced volume.

Gerhard Ryhiner

Chairman of the Managing Board WABAG Water Technology

THE LOCAL BENEFITS OF THE PROJECT

  • Cost-effective solution

  • Enhanced capacity

  • Small footprint

  • Efficient nutrient removal

  • Environmental benefits