Effect of bio-sludge concentration on the efficiency of sequencing batch reac…

Abstract. The removal efficiency of sequencing batch reactor (SBR) system with synthetic industrial estatewastewater (SIEWW) containing Ni2+ or Pb2+ was increased with the increase of mixed liquor suspended solids (MLSS). But, the sludge volume index (SVI) of the systemwas increased up to higher than 100 mL/g under MLSS of up to 4000 mg/L. Also, the effluent NO3− was decreased with the in…