Biochemical methane potential (BMP) of food waste and primary sludge: Influence of inoculum pre-incubation and inoculum source

Elbeshbishy, Elsayed; Nakhla, George; Hafez, Hisham

doi:10.1016/j.biortech.2012.01.025

Cited by 227 publications

(127 citation statements)

References 29 publications

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“…Hence, biochemical methane potential (BMP) tests [18][19][20][21] were employed as an estimate of the extent of digestion that might be expected in the continuous digesters.…”

Section: Methodsmentioning

confidence: 99%

Codigestion of high pressure thermal hydrolysis‐treated thickened waste activated sludge with primary sludge in two‐stage anaerobic digestion

Sarwar

Elbeshbishy

Parker

2017

Env Prog and Sustain Energy

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Pretreatment of thickened waste activated sludge (TWAS) with high pressure thermal hydrolysis (HPTH) prior to codigestion with primary sludge (PS) in two-stage anaerobic digestion was evaluated at two systems hydraulic residence times (HRTs). Pretreatment increased the soluble COD (SCOD) entering the acidogenic digester and at a 2 day HRT the increase in SCOD through the digester was also enhanced. With a 1 day HRT in the acidogenic digester the increment in SCOD concentrations was smaller in the pretreated reactor than in the control reactor suggesting there is a minimum residence time required to maintain hydrolysis of pretreated TWAS. At the 2 day HRT fermentation to volatile fatty acids (VFA) was similar in both reactors despite the considerably higher SCOD concentrations in the pretreated sludge. In contrast, at the 1 day HRT the pretreated digester VFA concentrations were 36% higher than that of the control digester. The control and pretreated methanogenic digesters operating at an HRT of 13 days had average total COD (TCOD) removal efficiencies of 45 and 52%, respectively which was consistent with an increase in methane yield from 0.19 L CH 4 /g COD for the control system to 0.23 L CH 4 /g COD for the pretreated system. With an HRT of 9 days, the corresponding TCOD removal efficiencies were reduced to 43% in and 48% respectively and the methane yields were 0.14 and 0.16 L CH 4 /g COD, respectively. COD removal to methane was found to be not significantly different between the control and pretreated systems at the reduced HRT.

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“…Hence, biochemical methane potential (BMP) tests [18][19][20][21] were employed as an estimate of the extent of digestion that might be expected in the continuous digesters.…”

Section: Methodsmentioning

confidence: 99%

Codigestion of high pressure thermal hydrolysis‐treated thickened waste activated sludge with primary sludge in two‐stage anaerobic digestion

Sarwar

Elbeshbishy

Parker

2017

Env Prog and Sustain Energy

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“…Se resalta también que el Inóculo C presentó una mayor producción en la relación S/I de 2 respecto a los otros, lo que puede ser atribuida a su mayor capacidad amortiguadora asociada con una mayor concentración de AB (2525mgL -1 ) y una mayor relación AB/AT o índice α, que pudo neutralizar el posible incremento de AGV´s y por ende, evitar la inhibición del proceso. Lo anterior contrasta con los resultados reportados por Elbeshbishy et al [33] quienes encontraron producciones de metano superiores a 660mL.gSV -1 sustrato .En éste estudio se utilizó un inóculo de PTAR que tratan aguas residuales de sistemas de alcantarillado separado; por consiguiente, la biomasa presenta un mecanismo enzimático capaz de transformar mayores concentraciones de materia orgánica a diferencia de los inóculos empleados en esta investigación. Con relación al efecto sobre la etapa de hidrólisis, la Tabla 3 muestra los resultados de K h y la fase de latencia (λ) para cada relación S/I evaluada.…”

Section: Promedio ± σ Unidadesunclassified

Evaluación de lodos de PTAR municipales como inóculos en la digestión anaerobia de biorresiduos

Orobio¹,

Lozada²,

Rebellón³

et al. 2016

rev.ion

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Evaluación de lodos de PTAR municipales como inóculos en la digestión anaerobia de biorresiduosEvaluation of sewage sludge from municipal WWTP as inoculum in the anaerobic digestion of biowaste Resumen La cantidad y calidad del inóculo empleado en los procesos de Digestión Anaerobia (DA), incide signifi cativamente sobre la biodegradabilidad y la cantidad de metano que se produce. Esta investigación evaluó el efecto de la procedencia de inóculos de plantas de tratamiento de aguas residuales municipales (PTAR) sobre la producción de metano como una fuente de energía renovable, a partir de la DA de Biorresiduos de Origen Municipal (BOM), analizando como aspectos claves la relación Sustrato-Inóculo (S/I) y la capacidad buffer del inóculo. Los experimentos se realizaron a escala de laboratorio mediante ensayos de Potencial Bioquímico de Metano (PBM) en el rango mesofílico con un Tiempo de Retención de Sólidos (TRS) de 21 días; dos de los inóculos procedieron de reactores UASB y el otro de un digestor anaerobio de lodos. Las relaciones S/I oscilaron entre 0,5 y 12gSV sustrato gSV -1 inóculo Avaliação de lodos de ETE municipais como inóculo na digestão anaeróbia fracção orgânica dos resíduos sólidos urbanos. Aunque se encontró que no existen diferencias estadísticas signifi cativas entre los inóculos (p>0,05), el inóculo procedente del digestor anaerobio presentó un mejor desempeño debido a su mayor capacidad buffer. La relación S/I presentó diferencias estadísticas signifi cativas (p<0,05), siendo las relaciones inferiores a 1 las que presentaron las mejores producciones de metano (>70mLCH 4 gSV -1 sustrato ), tasas de hidrólisis (0,15-0,21d -1 ) y fases de latencia (2,7-9,3d). Palabras clave: biorresiduos, energía renovable, hidrólisis, lodos anaerobios, metano, relación sustrato-inóculo. AbstractThe quantity and quality of inoculum used in the Anaerobic Digestion (AD), impact seriously on the biodegradability and the amount of methane produced. This research evaluated the effect of the source of inoculum municipal wastewater treatment plant (WWTP) on the production of methane as a source of renewable energy AD from Municipal Biowaste (MB), analyzing the Substrate-Inoculum (S/I) ratio and the buffering capacity of the inoculum as key aspects. The experiments were performed on a laboratory scale by testing Biochemical Methane Potential (BMP) in the mesophilic range with a retention time of solids (RTS) 21 days; two inoculums from UASB reactors and the other of an anaerobic sludge digester. The S/I ratios ranged between 0.5 and 12gVS substrate gVS -1 inoculum . Although it was found that there were no statistically signifi cant differences between the inoculum (p>0.05), the inoculum from the anaerobic digester presented a better performance because of its greater capacity buffer. The S/I ratio showed statistically signifi cant differences (p<0,05), being below 1 ratio that presented the best productions of methane (> 70mLCH 4 gVS -1 substrate ) hydrolysis rates (from 0,15 to 0,21d -1 ) and phases of lethargy (2,7-9,3d...

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“…In addition, the BMP test is also useful in estimating the optimum substrate and inoculums ratio and also the detention time of a substrate to achieve the perfect breaking down process Prior to the experiment, inoculums will undergo degasification process to adjust the bacteria condition to the new environment. Several different types of inoculums include sludge of industrial wastewater in anaerobic digester sludge of anaerobic digester from domestic wastewater livestock wastes, or anaerobic suspended sludge from domestic waste, and septic tank sludge [5][6][7][8][9][10][11][12]. This research aims to analyze biodegradability and the potential methane production from organic waste largely available in Indonesia.…”

Section: Introductionmentioning

confidence: 99%

Assessment of anaerobic biodegradability of five different solid organic wastes

Kristanto¹,

Asaloei²

2017

AIP Conference Proceedings

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Biochemical methane potential (BMP) of food waste and primary sludge: Influence of inoculum pre-incubation and inoculum source

Cited by 227 publications

References 29 publications

Codigestion of high pressure thermal hydrolysis‐treated thickened waste activated sludge with primary sludge in two‐stage anaerobic digestion

Codigestion of high pressure thermal hydrolysis‐treated thickened waste activated sludge with primary sludge in two‐stage anaerobic digestion

Evaluación de lodos de PTAR municipales como inóculos en la digestión anaerobia de biorresiduos

Assessment of anaerobic biodegradability of five different solid organic wastes

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