TY - JOUR
T1 - Performance of EGSB reactor using natural zeolite as support for treatment of synthetic swine wastewater
AU - Pérez-Pérez, Tania
AU - Pereda-Reyes, Ileana
AU - Correia, Gleyce Teixeira
AU - Pozzi, Eloisa
AU - Kwong, Wu Hong
AU - Oliva-Merencio, Deny
AU - Zaiat, Marcelo
AU - Montalvo, Silvio
AU - Huiliñir, César
N1 - Publisher Copyright:
© 2020 Elsevier Ltd.
PY - 2021/2
Y1 - 2021/2
N2 - An expanded granular sludge bed (EGSB) reactor using natural zeolite as support was evaluated for treating synthetic swine wastewaters. The process was operated at 30 °C during 255 days in two reactors at laboratory scale. The control reactor (Rc) was operated only with granular sludge while 120 g of zeolite was supplemented additionally in the other reactor (Rz). The anaerobic processes were developed with organic loading rate (OLR) up to 15 kgCOD/m3 d and different up-flow velocities (vup) were applied (6, 10 m/h). An operation up to 10 kgCOD/m3 d at 6 m/h no significant differences were found between reactors, but at 10 m/h and 15 kgCOD/m3 d, the zeolite-EGSB reactor provides a more stable process, with 89.1% of COD removal efficiency and less than 1 g/L of volatile fatty acids (VFAs) accumulation. Differences in granule formation and size as well as the populations of Bacteria and Archaea between the two reactors demonstrated the positive influence of zeolite addition.
AB - An expanded granular sludge bed (EGSB) reactor using natural zeolite as support was evaluated for treating synthetic swine wastewaters. The process was operated at 30 °C during 255 days in two reactors at laboratory scale. The control reactor (Rc) was operated only with granular sludge while 120 g of zeolite was supplemented additionally in the other reactor (Rz). The anaerobic processes were developed with organic loading rate (OLR) up to 15 kgCOD/m3 d and different up-flow velocities (vup) were applied (6, 10 m/h). An operation up to 10 kgCOD/m3 d at 6 m/h no significant differences were found between reactors, but at 10 m/h and 15 kgCOD/m3 d, the zeolite-EGSB reactor provides a more stable process, with 89.1% of COD removal efficiency and less than 1 g/L of volatile fatty acids (VFAs) accumulation. Differences in granule formation and size as well as the populations of Bacteria and Archaea between the two reactors demonstrated the positive influence of zeolite addition.
KW - Anaerobic expanded granular bed reactor
KW - Granular size
KW - Microbial diversity
KW - Natural zeolite
KW - Up-flow velocities
UR - http://www.scopus.com/inward/record.url?scp=85098167010&partnerID=8YFLogxK
U2 - 10.1016/j.jece.2020.104922
DO - 10.1016/j.jece.2020.104922
M3 - Article
AN - SCOPUS:85098167010
SN - 2213-2929
VL - 9
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 1
M1 - 104922
ER -