Israeli wastewater treatment company Emefcy has developed the revolutionary modular Spiral Aerobic Biofilm Reactor (SABRE).  The permeable membranes remove nitrogen using 80% less energy, providing a low cost solution for small wastewater plants.”

http://israelnewtech.com/2014/09/emefcy-presents-sabre-revolutionary-product-wastewater-treatment/

http://www.emefcy.com/product.php?ID=47   https://www.youtube.com/watch?v=p2pokUqJ07s