Effect of organic loading rate on the performance of two-stage anaerobic digestion of the organic fraction of municipal solid waste (OFMSW)

Two-stage anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) was carried out: hydrolysis and acidogenesis in a continuous anaerobic hydrolytic leach bed (AHLB) reactor loaded at different rates (Bv = 3.8-7 gVSSL⁻¹d⁻¹) and methanogenesis of leachates, diluted with municipal...

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Published inWater science and technology Vol. 72; no. 3; pp. 384 - 390
Main Authors Rodríguez-Pimentel, Reyna I, Rodríguez-Pérez, Suyen, Monroy-Hermosillo, Oscar, Ramírez-Vives, Florina
Format Journal Article
LanguageEnglish
Published England IWA Publishing 01.01.2015
Subjects
Acid production
Alternative energy sources
Anaerobic digestion
Anaerobic treatment
Anaerobiosis
Biogas
Biological Oxygen Demand Analysis
Bioreactors
Carbohydrates
Carbon dioxide
Chemical oxygen demand
Composting
Digestion
Dilution
Effluents
Fatty acids
Fatty Acids, Volatile - chemistry
Food
Hydrolysis
Leachates
Lipids
Load distribution
Loading rate
Methane
Methane - metabolism
Methanogenesis
Municipal solid waste
Municipal waste management
Municipal wastewater
Organic loading
Proteins
Reactors
Removal
Sewage
Sludge
Solid Waste - analysis
Solid waste management
Upflow anaerobic sludge blanket reactors
Volatile fatty acids
Volatile solids
Wastewater
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Summary:Two-stage anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) was carried out: hydrolysis and acidogenesis in a continuous anaerobic hydrolytic leach bed (AHLB) reactor loaded at different rates (Bv = 3.8-7 gVSSL⁻¹d⁻¹) and methanogenesis of leachates, diluted with municipal wastewater in an upflow anaerobic sludge blanket (UASB) reactor at organic loading rates of 6.6-13 gCODLr⁻¹d⁻¹. In the AHLB reactor, 51-76% and 58-71% volatile solids and chemical oxygen demand (COD) removal efficiencies were obtained. During the hydrolysis and acidogenesis phases, the effluents were at pH 4.93, the leachate had a volatile fatty acids concentration of 35 g/L and the biogas was composed only of CO₂. The average methane production in the UASB in the load of 4.4 gVS L⁻¹ d⁻¹ in the AHLB was 3.32 LCH4Lr⁻¹d⁻¹ (yCH4 = 80%), with COD removal efficiency of 95% and methane yield 279 LCH4KgVS⁻¹OFMSW degraded.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2015.223