Influence of agitation rate on the performance of a stirred anaerobic sequencing batch reactor containing immobilized biomass.
The present work reports on the influence of the mechanical agitation rates on the performance of a stirred anaerobic sequencing batch reactor containing immobilized biomass on polyurethane foam, as inert support, treating synthetic domestic wastewater. The reactor was operated at 30 degrees C and an 8-hour cycle was used to treat approximately 0.5 L of the synthetic substrate with a COD concentration of nearly 500 mg/L. The studied agitation rates ranged from no agitation to 750 rpm. The system attained non-filtered substrate removal efficiency greater than 83% when agitation was employed. A very short start-up period and good solid retention could be observed. The use of agitation increased the efficiency of the reactor and enabled reduction of the total cycle time. An empirical equation and a first-order kinetic model are proposed to analyze the influence of agitation rates on the reactor's performance.
Ratusznei
S M
SM
Departamento de Engenharia Química e de Alimentos-Escola de Engenharia Mauá-Centro Universitário Mauá-Instituto Mauá de Tecnologia (IMT), Praça Mauá 1, CEP 09.580-900, São Caetano do Sul-SP, Brasil.
Rodrigues
J A
JA
Camargo
E F
EF
Zaiat
M
M
Borzani
W
W
D001421:Bacteria, Anaerobic / Q000502:physiology*; D018533:Biomass; D019149:Bioreactors; D007700:Kinetics; D010100:Oxygen / Q000378:metabolism; D011140:Polyurethanes; D014865:Waste Disposal, Fluid / Q000379:methods*; D014872:Water Movements
D011140:Polyurethanes; C028279:polyurethane foam; D010100:Oxygen