Wan C.Yang X.Lee D.-J.Liu X.Sun S.Chen C.2019-05-142019-05-14201409608524https://scholars.lib.ntu.edu.tw/handle/123456789/407974Wastewaters with high salinity are yielded that need sufficient treatment. This study applied aerobic granules to conduct partial nitrification reactions for wastewaters with high NaCl concentrations in a continuous-flow reactor. The present granules revealed partial nitrification performances at nitrite accumulation rate >95% and chemical oxygen demand (COD) removal at >85% at salt concentration up to 50g l-1. High salinity led to compact and tough granules. The granules applied electrogenic ion pump and sodium-calcium exchanger to reduce intracellular Na+ concentration; generated amino acids as osmoprotectants to resist the high osmotic pressure; produced excess extracellular polysaccharides and proteins with secretion of c-di-GMP; revised microbial community with halophilic strains. The present continuous-flow aerobic granule reactor (CFAGR) is a promising process to convert ammonium in highly saline wastewaters to nitrite, which can be applied with a subsequent Anammox process for efficient nitrogen removal. ? 2013 Elsevier Ltd.Aerobic granulesContinuous-flow reactorMicrobial communityNaClOsmoprotectants[SDGs]SDG6journal article10.1016/j.biortech.2013.10.1122-s2.0-84888056718https://www.scopus.com/inward/record.uri?eid=2-s2.0-84888056718&doi=10.1016%2fj.biortech.2013.10.112&partnerID=40&md5=8fdc3c2af73a30fc298a6b6ab7079604