In March 1993 the municipalities Wullersdorf and Grabern established the wastewater association Gmoosbach. The primary reason was a provision of proper wastewater disposal. In 1997 municipality Guntersdorf and in 2004 the municipality Nappersdorf-Kammersdorf joined the association.

The task was to provide the inhabitants with a wastewater treatment plant which would comply with all applicable standards.

A full biological WWTP (14.240 P.E.) was designed. The WWTP is located in the municipality Schöngrabern and consists of the below listed parts:

• Operation building
• Mechanical pre-treatment
• Screens
• Aerated sand trap and grease remover
• Phosphate precipitation
• 4-SBR-Reactors
• Separate sludge stabilisation
• Blower station
• Sludge storage tank
• Septic tanks content disposal point
• Mechanical pre-treatment via centrifuge

• Project management
• Design for applicable permissions
• Application for financing of the project
• Detail design
• Elaboration of tender documentation
• Tender Evaluation
• Preparation of Works Contracts
• Construction supervision
• Taking-over
• Elaboration of final acceptance documentation
• Commissioning

• Client: Wastewater association Gmoosbach
• Project period: April 2001 - June 2004
• Investment volume: € 3.900.000,–
• Contact person: Andreas Käppl, MSc