Improving composting as a post-treatment of anaerobic digestate

Zeng, Yang; Guardia, A. de; Dabert, Patrick

doi:10.1016/j.biortech.2015.11.013

Cited by 99 publications

(35 citation statements)

References 33 publications

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“…Composting process usually involves three phases in which diverse microbial organisms like bacteria, actinomycetes and fungi act on the lignocellulosic components of the residue biomass. This converts waste into humus under mesophilic (Streptomyces rectus) and thermophilic (Actinobifida chromogena, Thermomonospora fusca, Microbispora bispora) conditions (Pan et al 2012;Zeng et al 2016). The first phase initiates with the rise in temperature and reduces substrate by degradation action of mesophiles (Zeng et al 2016).…”

Section: Microorganisms Are the Key To Agrowaste Bioconversionmentioning

confidence: 99%

“…This converts waste into humus under mesophilic (Streptomyces rectus) and thermophilic (Actinobifida chromogena, Thermomonospora fusca, Microbispora bispora) conditions (Pan et al 2012;Zeng et al 2016). The first phase initiates with the rise in temperature and reduces substrate by degradation action of mesophiles (Zeng et al 2016). This is followed by the increase in the temperature up to 70 °C due to the abundant activities of thermophilic microorganisms (Schloss et al 2003).…”

Section: Microorganisms Are the Key To Agrowaste Bioconversionmentioning

confidence: 99%

“…Understanding on microbial dynamics during different phases of composting helped better control of bio-oxidative processes followed by stabilization and maturation phases that use specific technology in static reactor of high capacity (up to 600 L or more) (Villar et al 2016). Studies have opened new avenues for better utilization of anaerobic digestate after improved composting using beneficial microorganisms, the products of which could be directly utilized in the farms for improving soil organic content (Zeng et al 2016). Such composts proved to be good alternatives of farmyard manures for field application.…”

Section: Technological Aspects Of Microbial Bioconversion Of Agricultmentioning

confidence: 99%

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Agrowaste bioconversion and microbial fortification have prospects for soil health, crop productivity, and eco-enterprising

Singh

Prabha

Shukla

et al. 2019

Int J Recycl Org Waste Agricult

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Purpose Agricultural chemicals either used as nutrient inputs for soil fertility or pesticides are creating physicochemical and biological deterioration of the soils and disturbing the agro-ecosystems worldwide. Alarming concerns towards integrated agroecology demand for renewed interest in low-external input-based farming practices. These practices comprise strengthening of soil biological properties, recycling of inherent soil minerals and reuse of agricultural residual wastes. Methods We described approaches for the bioconversion of agricultural residual wastes into value-added compost. The process involves conversion of residual waste into raw compost followed by its fortification with beneficial decomposer microorganisms to produce quality fortified compost product. Finally, incubation of fortified compost with single or consortia of beneficial microorganisms like N-fixers, P-solubilizers or K-mobilizers and biocontrol agents further enriches compost to produce bioorganic products.

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Section: Microorganisms Are the Key To Agrowaste Bioconversionmentioning

confidence: 99%

Section: Microorganisms Are the Key To Agrowaste Bioconversionmentioning

confidence: 99%

Section: Technological Aspects Of Microbial Bioconversion Of Agricultmentioning

confidence: 99%

See 1 more Smart Citation

Agrowaste bioconversion and microbial fortification have prospects for soil health, crop productivity, and eco-enterprising

Singh

Prabha

Shukla

et al. 2019

Int J Recycl Org Waste Agricult

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“…Composting is another well-known pathway to stabilize organic matter of various origins through a biooxidative process [4], which brings benefits as volume reduction, sanitization from pathogens, reduction of liquid contaminants, and economic and environmental returns [5,6]. In anaerobic digestion plants, the composting stage of the solid fraction of digestate generally occupies large volumes and requires long residence time, in addition to complex logistical steps [7,8]. The addition of a bulking agent in the compost pile is normally recommended, in particular when substrates as digestates are used.…”

Section: Introductionmentioning

confidence: 99%

Production and characterization of co-composted biochar and digestate from biomass anaerobic digestion

Casini¹,

Barsali²,

Rizzo³

et al. 2019

Biomass Conv. Bioref.

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Biochar, produced through pyrolysis of lignocellulosic biomass, is attracting increasing interest as soil amendment thanks to its potential numerous benefits to agriculture, as well as its ability to sequester carbon in soil. Solid fraction of digestate from anaerobic digestion is a well-known N-rich substrate, most often composted in large and small agro-industrial plants. Cocomposting biochar and digestate has the potential to synergistically increase the agronomic value of both components: however, it needs further process and on-field research. The present research work reports on the experimental tests on producing biochar and co-composting various biochar amounts with digestate from biomass anaerobic digestion (product here named COMBI). Biochar was produced by feeding wood chips from chestnut to an innovative oxidative reactor. In order to evaluate the quality of the products obtained by composting and co-composting, correlating this with the final biochar rate in the material, the net organic matter yield, the humified organic matter, the compliance with the European Compost Network Quality Assurance Scheme (ECN-QAS) limits for inorganic pollutants, and the product stabilization and sanitization indexes were investigated. The 11.2% w/w d.b. biochar rate in the initial blend (19.8% w/w d.b final concentration in the co-composted products) offered the best performances and is recommended for further investigation. Additional benefits from co-composting were also assessed, as the reduced dust load that favors safety and health during logistics and use.

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“…Sin embargo, existen algunas limitaciones que deben ser controladas en la implementación de la co-digestión de estos residuos, entre ellas: variabilidad de los RA, debido a que los microorganismos se aclimatan a una mezcla específica, por lo tanto, cambios en dicha mezcla producirán cambios en el rendimiento del reactor; altas concentraciones de iones metálicos, que pueden causar toxicidad en la co-digestión, riesgo que es mayor con el aumento de la fracción de RA en el proceso debido a que este tipo de residuos contienen normalmente iones metálicos; rápida acidificación de los compuestos orgánicos solubles presentes en los RA, que incrementa la concentración de ácidos grasos volátiles lo que también ocasiona toxicidad en el proceso [11]. Además el digestato producido contiene altas cargas orgánicas y nutrientes (principalmente nitrógeno y fósforo), y patógenos (puesto que los patógenos pueden sobrevivir en la digestión anaerobia, especialmente en el caso de la digestión anaerobica mesofílica); por otro lado, el almacenamiento y transporte del digestato es difícil debido a su alto contenido de agua [12,13]. Dependiendo de las características del digestato, éste puede requerir pos-tratamiento para su uso [14].…”

Section: Introductionunclassified

Evaluación de la co-digestión anaerobia de lodos de aguas residuales municipales con residuos de alimentos

Guerrero

Jaramillo

Perez

2016

rev.ion

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ResumenLa digestión anaerobia es un proceso ampliamente utilizado para el tratamiento de los lodos producidos en las plantas de tratamiento de agua residual, debido a sus ventajas técnicas y económicas. Este artículo presenta un estudio en el que se evaluó la co-digestión de lodos de aguas residuales con residuos de alimentos (RA) como una estrategia para optimizar la digestión de los lodos. Se realizaron mono-digestiones y co-digestiones de los sustratos en condiciones mesofílicas (35°C) usando reactores por lotes. Los lodos utilizados fueron: lodo primario (LP), lodo secundario espesado (LSE) y una mezcla de LP con LSE en la proporción 60:40 con base en sólidos totales (LP:LSE). Las co-digestiones se realizaron usando distintas proporciones de mezclas de los sustratos con base en sólidos volátiles totales: LP:RA=30:70, LP:RA=50:50, LP:RA=70:30 y (LP+LSE):RA=70:30. La máxima producción de metano, 0,25LCH 4 /gSVadicionado, se obtuvo para la mezcla LP:RA=30:70, presentando una producción 32% mayor que la obtenida en la mono-digestión del lodo primario. Palabras clave: co-digestión, producción de metano, lodo primario, lodo secundario espesado, residuos de alimentos. AbstractAnaerobic digestion is a process widely used for the treatment of sludge generated during wastewater treatment, due to its technical and economic advantages. This paper presents a study in which the co-digestion of sewage sludge with food waste (FW) was evaluated as a strategy for optimizing the digestion of sludge. Mono-digestions and co-digestions of the substrates were performed under mesophilic conditions (35°C) using batch reactors. The sludge used were: primary sludge (PS), thickened secondary sludge (TSS), and a mixture of PS with TSS in a ratio 60:40 based on total solids (PS:TSS). The co-digestions were performed using different ratios of mixtures of the substrates based on total volatile solids: PS:FW=30:70, PS:FW=50:50, PS:FW=70:30 y (PS+TSS):FW=70:30. The maximum methane yield, 0,25LCH 4 /gVSadded, was obtained for the mixture PS:FW=30:70, showing a yield 32% higher than the one obtained in the mono-digestion of PS.

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Improving composting as a post-treatment of anaerobic digestate

Cited by 99 publications

References 33 publications

Agrowaste bioconversion and microbial fortification have prospects for soil health, crop productivity, and eco-enterprising

Agrowaste bioconversion and microbial fortification have prospects for soil health, crop productivity, and eco-enterprising

Production and characterization of co-composted biochar and digestate from biomass anaerobic digestion

Evaluación de la co-digestión anaerobia de lodos de aguas residuales municipales con residuos de alimentos

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