Analysis of different techniques used for improvement of biomethanation process: A review

Krishania, Meena; Kumar, Virendra; Vijay, Virendra Kumar; Malik, Anushree

doi:10.1016/j.fuel.2012.12.007

Cited by 94 publications

(40 citation statements)

References 57 publications

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“…La presencia de cultivos como: mango, mandarina, naranja, lima, caña panelera, cacao, café y flores incrementa la [20]. Por el contrario, para el cultivo de caña panelera, el bagazo resultante tiene un contenido bajo de sólidos volátiles; entre 30 y 38,5% [21,22]. Para el cacao, los residuos (poda y cáscara) tienen un bajo potencial biológico de metano, pero son importantes debido al nivel de generación en el municipio.…”

Section: Metodologíaunclassified

“…Valores de C/N entre 20-30 presentan valores positivos e incrementan el rendimiento y el potencial de metano (Tabla 4). La relación para el estiércol producido por especies bovinas, porcinas y avícolas es de 20 [22], por lo que estos residuos son capaces por si solos de mantener el proceso de digestión anaerobia. A su vez, las elevadas relaciones de SV/ST (Tabla 4) garantizan disponibilidad de materia biodegradable para la producción de metano [18,31].…”

Section: Identificación Del Potencial De Biogás Por Residuounclassified

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Potencial de biogás de los residuos agroindustriales generados en el departamento de Cundinamarca

Orozco

Carpio

Cabeza

et al. 2016

rev.ion

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ResumenEl bajo grado de tecnificación de la mayoría de las granjas en el departamento de Cundinamarca, conlleva a una alta tasa de generación de residuos agroindustriales, haciendo indispensable la evaluación de alternativas de valorización. En este trabajo se determinó el potencial de producción de biogás de los residuos agroindustriales en el departamento de Cundinamarca a través de digestión anaerobia. El potencial se estableció a partir de tres acercamientos metodológicos que incluían la evaluación de la generación de residuos en cada uno de los municipios, cálculo del potencial por tipo de biomasa residual en el departamento e identificación de tres regiones con el mayor potencial de producción de biogás. El cálculo del potencial se soportó en una recopilación, estandarización y procesamiento de la información disponible de áreas cultivadas y residuos generados en cada sector y/o actividad. Cundinamarca tiene un potencial promedio de biogás de 1.117.567TJ/año calculado por la transformación de los residuos agroindustriales a través de proceso anaerobio. Los residuos de mayor aporte en el potencial encontrado corresponden a aquellos generados por actividades relacionadas con los cultivos de café, caña panelera, arveja, papa; excretas bovinas y avícolas. Las regiones que podrían cobijar sistemas centralizados se identificaron en torno a los municipios de Fómeque, Guachetá y Anapoima, los cuales presentaron mayor potencial. El potencial estimado para estas regiones fue de 89.651, 127.513, 58.541TJ/año para la región 1, región 2 y región 3, los cuales son similares a los reportados para plantas de biogás en varias regiones del mundo. Palabras clave: Biogás, biomasa, co-digestión anaerobia, potencial de biogás, residuos agro-industriales. AbstractThe low level of technology in the farms of the Cundinamarca department, leads to a high rate of agroindustrial waste generation, making important the assessment of valorization alternatives. In this work, the biogas production potential of agro-industrial residues in the department of Cundinamarca was established through anaerobic digestion. The potential has been established from three methodological approaches, including the assessment of waste generation in each of the municipalities, calculation of potential by type of residual biomass in the department and identification of three regions with the greatest potential for biogas production. The estimation of the potential was supported in the collection,

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Section: Metodologíaunclassified

Section: Identificación Del Potencial De Biogás Por Residuounclassified

Potencial de biogás de los residuos agroindustriales generados en el departamento de Cundinamarca

Orozco

Carpio

Cabeza

et al. 2016

rev.ion

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“…Anaerobic digestion is a widely applied process for the management of organic waste and the production of biogas, a gas mixture of methane and carbon dioxide (Krishania et al 2013). …”

Section: Introductionmentioning

confidence: 99%

“…The methane content of the biogas is used as a renewable energy carrier. Concerted efforts are at present focused on improving the production of biogas in order to expand the economic viability and application of anaerobic digestion technologies (Krishania et al 2013). …”

Section: Introductionmentioning

confidence: 99%

Chemical speciation of sulfur and metals in biogas reactors – Implications for cobalt and nickel bio-uptake processes

Yekta

Skyllberg

Danielsson

et al. 2017

Journal of Hazardous Materials

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A balanced supply of micronutrients, including metals such as iron (Fe), cobalt (Co), and nickel (Ni), is required for the efficient and stable production of biogas. During biogas formation, the uptake of micronutrient metals by microorganisms is controlled by a complex network of biological and chemical reactions, in which reduced sulfur (S) compounds play a central role. This thesis addresses the interrelationship between the overall chemical speciation of S, Fe, Co, and Ni in relation to the metals bio-uptake processes. Laboratory continuous stirred tank biogas reactors (CSTBR) treating S-rich grain stillage, as well as a number full-scale CSTBRs treating sewage sludge and various combinations of organic wastes, termed codigestion, were considered. Sulfur speciation was evaluated using acid volatile sulfide (AVS) extraction and S X-ray absorption near edge structure (XANES). The chemical speciation of Fe, Co, and Ni was evaluated through the determination of aqueous metals and metal fractions pertaining to solid phases, as well as kinetic and thermodynamic analyses (chemical speciation modelling).The relative Fe to S content in biogas reactors, which in practice is regulated through the addition of Fe for the purpose of sulfide removal or prior to the anaerobic digestion of sewage sludge, is identified as a critical factor for the chemical speciation and bio-uptake of metals. In the reactors treating sewage sludge, the quantity of Fe exceeds that of S, inducing Fe(II)-dominated conditions under anaerobic conditions, while sulfide dominates in the co-digestion and laboratory reactors due to an excess of S over Fe. Under sulfide-dominated conditions, chemical speciation of the metals is regulated by hydrogen sulfide and the formation of metal sulfide precipitates, which in turn restrict the availability of metals for microorganisms. However, despite the limitations set by sulfide, aqueous concentrations of different Co and Ni species were shown to be sufficient to support metal acquisition by the microorganisms under sulfidic conditions. Comparatively, the concentrations of free metal ions and labile metalphosphate and -carbonate complexes in aqueous phase, which directly participate in bio-uptake processes, are higher under Fe-dominated conditions. This results in an enhanced metal adsorption on cell surfaces and faster bio-uptake rates. It is therefore suggested that the chemical speciation and potential bioavailability of metals may be controlled through adjustments of the influent Fe concentration in relation to S content. The results also indicated that the pool of metal sulfides in the biogas reactors could be regarded as a source of metals for microbial activities. Thus, the recovery and utilisation of this fraction of metals may be considered as a measure with which to minimise the metal dosing concentrations to CSTBRs.Keywords: Biogas, Anaerobic digestion, Chemical speciation, bio-uptake, Sulfur, Iron, Cobalt, Nickel SammanfattningFör att en effektiv och stabil biogasproduktion från organiskt a...

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“…There are some major constraints for anaerobic reactors for digestion of agricultural residue, one of which is pretreatment for agricultural residue, because such biomass contains high content of lignin, which is hardly biodegradable by anaerobic microorganisms. Therefore, various types of pretreatment have been investigated and reported to provide a solution [5,6]. Alkali pretreatment, like sodium hydroxide, calcium hydroxide, and sodium carbonate, has been reported to be cost effective over the other pretreatments, with enhanced efficiency of biomethanation of wheat straw [4].…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of various bioreactors for methane fermentation of pretreated wheat straw with cattle manure

Krishania

Vijay

Chandra

2016

Green Processing and Synthesis

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This paper examines the performance results of configured semi-continuous mesophilic bioreactors for methane fermentation of pretreated wheat straw codigested with cattle manure. The semi-continuous process was carried out in three different types of bioreactors, i.e. continuous stirred tank reactor (CSTR), fixed film reactor (FFR), and conventional floating drum reactor (CR), with an organic loading rate of 2.2 kg of volatile solids (VS)/ day. The observed results revealed that the configuration of the FFR increased the methane production yield by 41.1%. However, the configuration of the CSTR had only a marginal effect on enhancement of methane production yield (yield increased only by 10.6%) compared to the CR. The VS removal for digesters did not vary much at the same organic loading rate. The study revealed that the pretreated wheat straw with the FFR had yield methane production of 0.342 m 3 /kg VS, whereas the CSTR and CR had yield methane production of 0.289 m 3 /kg VS and 0.264 m 3 /kg VS, respectively.

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Analysis of different techniques used for improvement of biomethanation process: A review

Cited by 94 publications

References 57 publications

Potencial de biogás de los residuos agroindustriales generados en el departamento de Cundinamarca

Potencial de biogás de los residuos agroindustriales generados en el departamento de Cundinamarca

Chemical speciation of sulfur and metals in biogas reactors – Implications for cobalt and nickel bio-uptake processes

Performance evaluation of various bioreactors for methane fermentation of pretreated wheat straw with cattle manure

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