期刊
BIORESOURCE TECHNOLOGY
卷 75, 期 2, 页码 127-132出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0960-8524(00)00048-1
关键词
stirred anaerobic sequencing batch reactor; immobilized sludge; low strength wastewater; polyurethane foam
This paper proposes a new configuration of a stirred anaerobic bioreactor to improve the biomass retention in sequencing batch processes for treating low strength wastewater. In the proposed configuration, the biomass was immobilized on a polyurethane foam matrix, thus resulting in the elimination of or reduction in settling time. The reactor was operated ata temperature of 30 degrees C and an agitation rate of 500 rpm supplied by means of a stirring bar at the bottom of the reactor. An 8-h cycle was used to treat 0.51 of a synthetic substrate containing a chemical oxygen demand (COD) of 485 mg/l. The overall COD removal efficiency attained 86% in the first 3 h of the cycle, as shown by the concentration profile. (C) 2000 Elsevier Science Ltd. All rights reserved.
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