The AS+ unit combines activated-sludge (AS) treatment with a membrane process. Several configurations are possible:

• “Classic” activated-sludge treatment
• Using media with or without activated sludge
• SBR (Sequential Biological Reactor)
• MBR (Membrane Bioreactor)
• LSP (Low Sludge Production)

Main features

• Cost: $1.2 million
• Treatment capacity: 1 m3/h to 4 m3/h