Sensor-mediated granular sludge reactor for nitrogen removal and reduced aeration demand using a dilute wastewater.

ABSTRACT: A sensor-mediated strategy was applied to a laboratory-scale granular sludge reactor (GSR) to demonstrate that energy-efficient inorganic nitrogen removal is possible with a dilute mainstream wastewater. The GSR was fed a dilute wastewater designed to simulate an A-stage mainstream anaerobic treatment process. DO, pH, and ammonia/nitrate sensors measured water quality as part of a real-time control strategy that resulted in low-energy nitrogen removal. At a low COD (0.2 kg m^-3  day^-1 ) and ammonia (0.1 kg-N m^-3  day^-1 ) load, the average degree of ammonia oxidation was 86.2 ± 3.2% and total inorganic nitrogen removal was 56.7 ± 2.9% over the entire reactor operation. Aeration was controlled using a DO setpoint, with and without residual ammonia c

SUBMITTER: Bekele ZA 

PROVIDER: S-EPMC7383604 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature