Modeling of Anaerobic Digestion of Sludge

Tomei, M. Concetta; Braguglia, Camilla Maria; Cento, Giorgia; Mininni, Giuseppe

doi:10.1080/10643380801977818

Cited by 85 publications

(35 citation statements)

References 52 publications

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“…Some empirical studies have presented biogas yield as a function of retention time, 154 including (Bolzonella, et al, 2005), and (Bilgili, et al, 2009 (Angelidaki, et al, 1999); the representation of feed 179 materials not as volatile solids but rather as organic component groups (Tomei, et al, 2009); 180 and the effects of operating temperature. While kinetic models are useful academically, it is 181 very difficult to apply these to farm-fed AD units due to the lack of measurements taken 182 inside the digester tank (refer to Figure 1).…”

Section: Page 8 Of 32mentioning

confidence: 99%

A spreadsheet calculator for estimating biogas production and economic measures for UK-based farm-fed anaerobic digesters

Lovett

McEwan

et al. 2016

Bioresource Technology

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Section: Page 8 Of 32mentioning

confidence: 99%

A spreadsheet calculator for estimating biogas production and economic measures for UK-based farm-fed anaerobic digesters

Lovett

McEwan

et al. 2016

Bioresource Technology

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“…A 32% difference of transportation between centralized and decentralized options had a relatively small effect on the overall environmental impact. For treatment of sewage sludge, AD has advantage for the main objectives of the degradation and destruction of organic feedstocks, with consequent sludge stabilization and pathogen reduction since sewage sludge supply is stable (Aiyuk et al, 2006;Tomei et al, 2009;Abe et al, 2011). A decentralized biogas plant is small size which may be more attractive since raw feedstocks are available in certain distance for small farm scale.…”

Section: Introductionmentioning

confidence: 99%

Decentralized Biogas Technology of Anaerobic Digestion and Farm Ecosystem: Opportunities and Challenges

Wang

2014

Front. Energy Res.

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Long-term economic and environmental concerns have resulted in a great amount of research on renewable sources of biomass and bioenergy to replace fossil fuels in the past decades. Decentralized biogas technology is one of the most potential technologies of biomass and bioenergy by using agricultural waste materials (e.g., animal manure, crop straw, and by-products from food industries) as feedstocks. By-products from biogas production, called digestate, are nutrient rich, which could potentially be reused as green fertilizers in agriculture, thereby providing a sustainable substitute for synthetic fertilizers for farm ecosystem. Thus, the biogas production of anaerobic digestion is win-win option for livestock and crop producers to address issues of waste management and energy supply, and to avoid contamination of surface and ground waters and emissions of odors and greenhouse gases. In this paper, we review biogas production technology and then evaluate environmental effects of digestate used as fertilizer. Finally, we discuss issues of deployment of decentralized biogas technology for farm ecosystem. Economic and technological barriers still exist for large scale deployment of biogas technology in rural region. Two national scale deployments in China and Nepal showed that the operational status of biogas digesters is not optimal and up to 50% of plants are non-functional after a short operation period regardless of the social and economic factors. Main barriers are a wide variation of feedstocks and environmental conditions (e.g., temperature) over space and time. It becomes clear that the experimental conditions of the pilot plants need to be adjusted and calibrated to the local feedstocks and climate. Also, more research needs to be done in cold fermentation technology. Thus, collaboration of all relevant designers, farmers, stakeholders, and regulators is proposed as the way forward, particularly as their complexity has been identified as the major hurdle to the implementation of decentralized biogas production, which can deliver beneficial synergies for the decentralized biogas production in rural region responsible for food production and waste management.

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“…Despite this, the relationships between the dynamic behavior of microbial communities and environmental parameters in AD have hardly been studied [1,39]. Indeed, there is a pressing need for more and better information on the biology, rates and limitations of microbially-mediated processes during AD.…”

Section: Trace Metal Microbiology and Microbial Ecologymentioning

confidence: 99%

Fate of Trace Metals in Anaerobic Digestion

Fermoso

Hullebusch²,

Guibaud

et al. 2015

Biogas Science and Technology

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A challenging, and largely uncharted, area of research in the field of anaerobic digestion science and technology is in understanding the roles of trace metals in enabling biogas production. This is a major knowledge gap and a multifaceted problem involving metal chemistry; physical interactions of metal and solids; microbiology; and technology optimization. Moreover, the fate of trace metals, and the chemical speciation and transport of trace metals in environmentsoften agricultural lands receiving discharge waters from anaerobic digestion processes -is completely unknown but simultaneously represents challenges for environmental protection and opportunities to close process loops in anaerobic biotechnologies. Affiliation 1.

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Modeling of Anaerobic Digestion of Sludge

Cited by 85 publications

References 52 publications

A spreadsheet calculator for estimating biogas production and economic measures for UK-based farm-fed anaerobic digesters

A spreadsheet calculator for estimating biogas production and economic measures for UK-based farm-fed anaerobic digesters

Decentralized Biogas Technology of Anaerobic Digestion and Farm Ecosystem: Opportunities and Challenges

Fate of Trace Metals in Anaerobic Digestion

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