TY - CHAP
T1 - Comparison of bioreactors with different kinds of submerged packed beds for domestic wastewater treatment
AU - Mijaylova Nacheva, Petia
AU - Chávez, G. Moeller
AU - Bustos, C.
AU - Zúñiga, M. A.Garzón
AU - Orozco, Y. Hornelas
PY - 2008/1/1
Y1 - 2008/1/1
N2 - The performance of aerobic submerged packed bed reactors was studied for the treatment of domestic wastewater using different kinds of packing materials with high specific areas (760-1,200 m2/m3). The tested materials were ceramic spheres, crushed tezontle, grains of high density polyethylene (HDPE), of low density polyethylene (LDPE) and of polypropylene (PP), cubes of polyurethane (PU) and polyethylene tape (SESSIL). The bioreactors were operated in continuous regime, applying organic loads in the range of 0.8-6.0 g COD.m-2.d-1. The obtained specific COD removal rates were very similar in all the reactors when they were operated at organic loads up to 2.0g COD.m-2.d-1, after which differences in effectiveness appeared and the best results were determined in the reactors with SESSIL, LDPE and PU. Very low TSS, O&G and turbidity were obtained in all the effluents. The NH3-N and TN removals were dependant on the dissolved oxygen (DO) concentration and the removals at DO of 5 mg/l were 84-99% and 61-74% respectively. The best removals were determined in the reactors with PU, SESSIL and LDPE. The reactor with tezontle had also a good performance when operated with loads up to 1.0 g TN.m-2.d-1. The best phosphate removals (38-49%) were obtained in the reactors with PU, tezontle, ceramic sheres and SESSIL.
AB - The performance of aerobic submerged packed bed reactors was studied for the treatment of domestic wastewater using different kinds of packing materials with high specific areas (760-1,200 m2/m3). The tested materials were ceramic spheres, crushed tezontle, grains of high density polyethylene (HDPE), of low density polyethylene (LDPE) and of polypropylene (PP), cubes of polyurethane (PU) and polyethylene tape (SESSIL). The bioreactors were operated in continuous regime, applying organic loads in the range of 0.8-6.0 g COD.m-2.d-1. The obtained specific COD removal rates were very similar in all the reactors when they were operated at organic loads up to 2.0g COD.m-2.d-1, after which differences in effectiveness appeared and the best results were determined in the reactors with SESSIL, LDPE and PU. Very low TSS, O&G and turbidity were obtained in all the effluents. The NH3-N and TN removals were dependant on the dissolved oxygen (DO) concentration and the removals at DO of 5 mg/l were 84-99% and 61-74% respectively. The best removals were determined in the reactors with PU, SESSIL and LDPE. The reactor with tezontle had also a good performance when operated with loads up to 1.0 g TN.m-2.d-1. The best phosphate removals (38-49%) were obtained in the reactors with PU, tezontle, ceramic sheres and SESSIL.
KW - Aerobic biofilters
KW - Submerged bed
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=50849098501&partnerID=8YFLogxK
U2 - 10.2166/wst.2008.321
DO - 10.2166/wst.2008.321
M3 - Capítulo
C2 - 18653933
AN - SCOPUS:50849098501
SN - 9781843391883
VL - 58
SP - 29
EP - 36
BT - Water Science and Technology
PB - IWA Publishing
ER -