Scale effect of anaerobic digestion tests in fed-batch and semi-continuous mode for the technical and economic feasibility of a full scale digester

Ruffino, Barbara; Fiore, Silvia; Roati, Chiara; Campo, Giuseppe M.; Novarino, Daniel; Zanetti, Mariachiara

doi:10.1016/j.biortech.2015.02.021

Cited by 54 publications

(24 citation statements)

References 32 publications

(23 reference statements)

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“…The results obtained are comparable with other studies from the literature [35][36][37][38][39][40][41]. For example Battista et al [35] determined experimentally 5.40-14.10 m 3 ·t −1 biogas produced from different samples of olive pomace.…”

Section: Biogas Potential Estimationsupporting

confidence: 89%

Respirometric Index and Biogas Potential of Different Foods and Agricultural Discarded Biomass

et al. 2016

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Abstract:The biological stability of biomass is an important parameter for treatment plant design, process control or compost use. Measuring the biological reactivity of waste with the help of indicators such as respirometric indexes (RI) becomes an important tool to prevent the significant environmental impact of biodegradable wastes in accordance with European legislation. The aim of this paper is to show the importance of the RI technique as a tool to establish further uses of biomass such as fertilizer or biogas. The respirometric process length for different types of biomass (grape marc, apple pomace and olive pomace) was quantified. Higher moisture content seemed to favor the biological activity during the respirometric experiments and shorten the length of the process. The duration of olive pomace respirometry did not exceed 3 days, while the respirometric activity of apple scraps the lasted approximately 2 days. The highest RI values were encountered for the apple pomace, 4888 mgO 2 ·kg VS −1 ·h −1 . The majority of the discarded biomasses are categorized in the third class of stability materials in the course of degradation. This technique is important to detect the biodegradability of substrates, as well as to gain insight into the quantity and generation rate of biogas produced, information that is important from an engineering management perspective.

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Section: Biogas Potential Estimationsupporting

confidence: 89%

Respirometric Index and Biogas Potential of Different Foods and Agricultural Discarded Biomass

et al. 2016

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“…Mixing solid and liquid food waste resulted in methane yields obtained in semicontinuously operated reactors that were between 60 and 80% of the yields obtained with batch tests (Zhang et al, 2013). Methane yields obtained with a 300-L pilot-scale reactor was approximately 80% of that obtained from the smaller scale test (Ruffino et al, 2015). Small differences between BMPs and methane yields obtained with a 1700-L fermenter were observed for wastes from macroalgae processed for biofuel, pharmaceutical, or food industries (Barbot et al, 2015).…”

Section: Comparison Of Measured and Calculated Methane Production Of mentioning

confidence: 95%

“…A comparison of methane production from bench-and sub pilot-scale anaerobic digesters showed that BMPs of feedstock co-digestion mixtures accurately estimated the range of methane produced from three 100-L plug-flow reactors (Sell et al, 2011). Methane production in a 300-L semicontinuous reactor was approximately 75-80% of the one determined in 6-L fed-batch reactors (Ruffino et al, 2015). Comparison of laboratory scale BMP results with fullscale biogas production has not yet been reported.…”

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confidence: 98%

Methane Production of Full-Scale Anaerobic Digestion Plants Calculated from Substrate’s Biomethane Potentials Compares Well with the One Measured On-Site

2017

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Biomethane potential (BMP) tests are used to determine the amount of methane that can be produced from organic materials in order to design different components of fullscale anaerobic digestion (AD) plants such as size of the digesters and units exploiting the produced biogas. However, little is known on how well BMPs compare with biogas production from the same organic materials in full-scale installations. In this study, two AD plants were chosen to carry out such comparisons, a dry AD plant treating green waste from urban areas and food waste from restaurants and supermarkets, and a liquid AD plant treating waste sludge from wastewater treatment and seven additional organic wastes. The BMPs of multiple samples of the individual organic materials collected during a period of 7-9 months were determined. Separate tests of mixtures of organic materials confirmed that the BMP of the mixtures can be calculated by adding the BMPs of the individual materials. The weekly methane production during the investigated periods was calculated from the full-scale installation data on the feeding of the digesters and the BMPs of each substrate fed into the digesters and compared with the weekly methane production measured on-site. The latter was calculated from the most accurately measured entity, either the electricity or the volume of purified biomethane injected into the grid. The weekly methane production rates calculated from BMPs and the one measured on-site were very similar and followed the same pattern. Some exceptions could be explained by, e.g., an overload of the full-scale installation. The measured weekly methane production accounted for 94.0 ± 6.8 and 89.3 ± 5.7% of the calculated weekly methane production for the wet and dry AD plant, respectively. For 26 out of 29 weeks, the calculated weekly methane production overestimated the measured one in the case of the wet AD plant and for 37 out of 39 weeks for the dry AD plant. Based on these results, it is proposed using an extrapolation coefficient of 0.8 to 0.9 to estimate the methane production of full-scale AD plants from BMPs of the substrates to be digested and their specific organic loads.

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“…Anaerobic co-digestion technology is increasingly used to simultaneously treat solid and liquid organic waste with the aims of balancing the nutrient content, to reduce the negative effects of toxic compounds on the process, and to increase the biogas yield and CO 2 capture like those of others biofuels [5,7,9,12,16,17,28].…”

Section: Discussionmentioning

confidence: 99%

“…It is estimated that the transformation of one ton of raw agricultural material generates from 30-100 kg of organic waste [9]. In particular, residues from the olive oil industry are an excellent feed for AD plants, as this waste is produced in high quantity during a short period, and is not biodegradable due to the high concentration in organic and phenolic compounds [10,11].…”

Section: Introductionmentioning

confidence: 99%

An Economical Evaluation of Anaerobic Digestion Plants Fed with Organic Agro-Industrial Waste

et al. 2017

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Anaerobic co-digestion technology is increasingly used to simultaneously treat solid and liquid organic waste to balance nutrient content, to reduce the negative effects of toxic compounds in the process, and to increase biogas yield. The aim of this study was to analyze the economic performance of co-digestion plants fed with agro-industrial wastes as a function of installed power, with a method of discounted cash flow. The study focused on Italian framework conditions concerning payment for electricity produced by anaerobic digestion (AD) plants as well as the production costs. The economic analysis was carried out using three different plant sizes: 100 kW, 500 kW, and 1000 kW, which are representative of biogas plants in Italy. The study showed that the improvement of the break-point is closely linked to the increase in corresponding plant size. Given the assumptions of the simulation, the payback for the 100 kW plant was nine years for both the all-inclusive tariff and the basic feed-in tariff (BFT). Regarding the 500 kW and 1000 kW plants, the payback periods were five and four years, respectively.

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Scale effect of anaerobic digestion tests in fed-batch and semi-continuous mode for the technical and economic feasibility of a full scale digester

Cited by 54 publications

References 32 publications

Respirometric Index and Biogas Potential of Different Foods and Agricultural Discarded Biomass

Respirometric Index and Biogas Potential of Different Foods and Agricultural Discarded Biomass

Methane Production of Full-Scale Anaerobic Digestion Plants Calculated from Substrate’s Biomethane Potentials Compares Well with the One Measured On-Site

An Economical Evaluation of Anaerobic Digestion Plants Fed with Organic Agro-Industrial Waste

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