Influence of agitation rate on the performance of an anaerobic sequencing batch reactor containing granulated biomass treating low-strength wastewater

2003 ◽  
Vol 7 (2) ◽  
pp. 405-410 ◽  
Author(s):  
José Alberto Domingues Rodrigues ◽  
Suzana Maria Ratusznei ◽  
Eduardo Freitas Moraes de Camargo ◽  
Marcelo Zaiat
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Agitation Rate ◽  
Anaerobic Sequencing Batch Reactor ◽  
Low Strength

Influence of agitation rate on the performance of a stirred anaerobic sequencing batch reactor containing immobilized biomass

2001 ◽  
Vol 44 (4) ◽  
pp. 305-312 ◽  
Author(s):  
S. M. Ratusznei ◽  
J. A.D. Rodrigues ◽  
E. F.M. Camargo ◽  
M. Zaiat ◽  
W. Borzani
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Domestic Wastewater ◽  
Agitation Rate ◽  
Order Kinetic ◽  
Mechanical Agitation ◽  
Anaerobic Sequencing Batch Reactor ◽  
Substrate Removal ◽  
Order Kinetic Model ◽  
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°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.

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