title: Start-up and operation strategies on the liquefied food waste anaerobic digestion and a full-scale case application.
abstract: Batch anaerobic digestion was employed to investigate the efficient start-up strategies for the liquefied food waste, and sequencing batch digestion was also performed to determine maximum influent organic loading rate (OLR) for efficient and stable operation. The results indicated that the start-up could be well improved using appropriate wastewater organic load and food-to-microorganism ratios (F/M). When digestion was initialized at low chemical oxygen demand (COD) concentration of 20.0 gCOD L(-1), the start-up would go well using lower F/M ratio of 0.5-0.7. The OLR 7.0 gCOD L(-1) day(-1) was recommended for operating the ASBR digestion, in which the COD conversion of 96.7 ± 0.53% and biomethane yield of 3.5 ± 0.2 L gCOD(-1) were achieved, respectively. The instability would occur when OLR was higher than 7.0 gCOD L(-1) day(-1), and this instability was not recoverable. Lipid was suggested to be removed before anaerobic digestion. The anaerobic digestion process in engineering project ran well, and good performance was achieved when the start-up and operational strategies from laboratory study were applied. For case application, stable digestion performance was achieved in a digester (850 m(3) volume) with biogas production of 1.0-3.8 m(3) m(-3) day(-1).
authors.affiliation: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing, 100029, People's Republic of China, mengyingbuct@gmail.com.
authors.forename: Ying
authors.initials: Y
authors.lastname: Meng
authors.forename: Fei
authors.initials: F
authors.lastname: Shen
authors.forename: Hairong
authors.initials: H
authors.lastname: Yuan
authors.forename: Dexun
authors.initials: D
authors.lastname: Zou
authors.forename: Yanping
authors.initials: Y
authors.lastname: Liu
authors.forename: Baoning
authors.initials: B
authors.lastname: Zhu
authors.forename: Akiber
authors.initials: A
authors.lastname: Chufo
authors.forename: Muhammad
authors.initials: M
authors.lastname: Jaffar
authors.forename: Xiujin
authors.initials: X
authors.lastname: Li
mesh_terms: D000693:Anaerobiosis; D057005:Bioengineering; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002681:China; D005502:Food; D012037:Refuse Disposal / Q000379:methods*; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry
chemical_list: D056804:Biofuels; D062065:Wastewater