TY - JOUR
T1 - Development of a staged anaerobic pond for methane recovery from domestic wastewater
AU - Cruddas, P. H.
AU - McAdam, E. J.
AU - Asproulis, N.
AU - Antoniadis, A.
AU - Ansari, I.
AU - Best, D.
AU - Jefferson, B.
AU - Cartmell, E.
AU - Collins, Gavin
AU - Porca, E.
AU - Peña-Varón, M. R.
PY - 2018/10/15
Y1 - 2018/10/15
N2 - Since their inception in larger pond systems, the focus of anaerobic ponds has shifted from solids removal to optimising biogas production and reducing physical footprint to minimise land requirements. In this study, a horizontally baffled (HBAP) and vertically baffled (VBAP) anaerobic pond were compared. Distinct differences in the removal efficiency of COD fractions were observed, with particulate COD removal of 78% and 32%, and soluble COD removal of −26% and 19% in the HBAP and VBAP, respectively. A staged pond (SAP) was constructed through an HBAP placed upstream of a VBAP, with an additional HBAP used as a control (CAP). The SAP demonstrated superior biogas recovery potential over the control: methane production by the conclusion of the study was 6.09 and 9.04 LCH4 m−3 wastewater treated for the CAP and SAP, respectively. Methanogenic activity in the ponds was higher closer to the outlet, and hydrogenotrophic methanogenesis dominated over acetoclastic pathways.
AB - Since their inception in larger pond systems, the focus of anaerobic ponds has shifted from solids removal to optimising biogas production and reducing physical footprint to minimise land requirements. In this study, a horizontally baffled (HBAP) and vertically baffled (VBAP) anaerobic pond were compared. Distinct differences in the removal efficiency of COD fractions were observed, with particulate COD removal of 78% and 32%, and soluble COD removal of −26% and 19% in the HBAP and VBAP, respectively. A staged pond (SAP) was constructed through an HBAP placed upstream of a VBAP, with an additional HBAP used as a control (CAP). The SAP demonstrated superior biogas recovery potential over the control: methane production by the conclusion of the study was 6.09 and 9.04 LCH4 m−3 wastewater treated for the CAP and SAP, respectively. Methanogenic activity in the ponds was higher closer to the outlet, and hydrogenotrophic methanogenesis dominated over acetoclastic pathways.
KW - Anaerobic baffled reactors
KW - Biogas
KW - Psychrophilic treatment
KW - Waste stabilisation lagoons
UR - http://www.scopus.com/inward/record.url?scp=85051133427&partnerID=8YFLogxK
U2 - 10.1016/j.ecoleng.2018.08.001
DO - 10.1016/j.ecoleng.2018.08.001
M3 - Article
AN - SCOPUS:85051133427
SN - 0925-8574
VL - 122
SP - 169
EP - 176
JO - Ecological Engineering
JF - Ecological Engineering
ER -