Effects of phenol on physicochemical properties and treatment performances of partial nitrifying granules in sequencing batch reactors.

ABSTRACT: This study attempts to investigate the effect of phenol on physicochemical properties and treatment performances of partial nitrifying granules (PNGs). Two sequencing batch reactors (SBRs) fed with synthetic ammonium wastewaters were operated in absence (R1) or presence (R2) of phenol. The PNGs in R1 maintained excellent partial nitrification performance and relatively stable physicochemical properties, and exhibited compact and regular shaped structure with a cocci-dominant surface. However, as phenol concentration was stepwise increased from 0 to 300 mg/L in R2, filamentous bacteria appeared and gradually dominated within granules, which in turn resulted in settleability deterioration. Most notably, granules in R2 got easier to agglomerate in the reactor walls and then been washed out wi

SUBMITTER: Gao M 

PROVIDER: S-EPMC5361127 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature