High rate biological nutrient removal from high strength wastewater using anaerobic-circulating fluidized bed bioreactor (A-CFBBR)

► Development of an integrated system for biological nutrient removal from high strength WW. ► High rate C and N removal at a high OLR of 35 kg COD/m3 d and NLR of 1.1 kg N/m3 d. ► High rate biogas production per reactor volume of 16 L gas/Lreactor d. ► A very low overall system sludge yield of 0.017 g VSS/g COD.