Influence of temperature on performance of an anaerobic sequencing biofilm batch reactor with circulation applied to treatment of low-strength wastewater.

Abstract:

:The effect of temperature on the performance of an anaerobic sequencing biofilm batch reactor (ASBBR) with liquid-phase recirculation was assessed. Assays were performed using a recirculation velocity of 0.20 cm/s, 8-h cycles, and an average treated synthetic wastewater volume of 2 L/cycle with a concentration of 500 mg of Chemical Oxygen Demand (COD)/L. Operation temperatures were 15, 20, 25, 30, and 35 degrees C. At 25, 30, and 35 degrees C, organic matter removal efficiencies for filtered samples ranged from 81 to 83%. At lower temperatures, namely 15 and 20 degrees C, removal efficiency decreased significantly to 61 and 65%, respectively. A first-order model could be fitted to the experimental concentration profile values. The first-order kinetic parameter value of this model varied from 0.46 to 0.81 h-1 considering the lowest and highest temperature studied. Moreover, analysis of the removal profile values allowed fitting of an Arrhenius-type equation with an activation energy of 5715 cal/mol.

authors

Agibert SA,Moreira MB,Ratusznei SM,Rodrigues JA,Zaiat M,Foresti E

doi

10.1007/BF02686017

subject

Has Abstract

pub_date

2007-02-01 00:00:00

pages

193-206

issue

2

eissn

0273-2289

issn

1559-0291

pii

ABAB:136:2:193

journal_volume

136

pub_type

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