Influence of bioparticle size on the degradation of partially soluble wastewater in an anaerobic sequencing batch biofilm reactor (ASBBR)

An evaluation was made of the influence of bioparticle size on the degradation kinetics of a partially soluble synthetic wastewater in an anaerobic sequencing batch biofilm reactor, mechanically stirred, containing immobilized biomass. The 4.5-L reactor was operated at 30 °C, with biomass immobilize...

Full description

Saved in:
Bibliographic Details
Published in:Process biochemistry (1991) 2005-10, Vol.40 (10), p.3206-3212
Main Authors: Pinho, Samantha C., Ratusznei, Suzana M., Rodrigues, José Alberto D., Foresti, Eugenio, Zaiat, Marcelo
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An evaluation was made of the influence of bioparticle size on the degradation kinetics of a partially soluble synthetic wastewater in an anaerobic sequencing batch biofilm reactor, mechanically stirred, containing immobilized biomass. The 4.5-L reactor was operated at 30 °C, with biomass immobilized on cubical polyurethane foam matrices (0.5, 1.0, 2.0 and 3.0 cm sides) and mechanically stirred by three flat-blade turbines (6 cm) at an agitation rate of 500 rpm. The COD of the synthetic wastewater was 1000 mg/L (50% suspended). The apparent first-order kinetic constants ( k 1 app ), calculated for filtered and suspended COD, did not show the expected tendency (smaller the particle, higher the coefficients). For suspended COD, the maximum k 1SS app occurred with 1-cm bioparticles. This particle size probably favoured better foam packing, enhancing the hydrodynamic conditions and dissolution rates. In filtered COD, the maximum k 1F app occurred with 2-cm bioparticles, which was attributed to the correlation between the foam packing and the conventional and nonconventional mass transfer phenomena. Even then, a kinetic analysis of individual substrates (carbohydrates, proteins and lipids) revealed the expected tendency.
ISSN:1359-5113
1873-3298
DOI:10.1016/j.procbio.2005.02.002