Codigestion of solid wastes: A review of its uses and perspectives including modeling

Mata‐Alvarez, J.; Dosta, J.; Macé, S.; Astals, Sergi

doi:10.3109/07388551.2010.525496

Cited by 253 publications

(126 citation statements)

References 94 publications

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“…The use of co-digestion of substrates in order to stabilize the digestion process by improving the C/N-ratio has been mentioned by several authors ; (Brune et al, 2009, Khalid et al, 2011, Mata-Alvarez et al, 2011. Especially for algae biomass it has been pointed out that the anaerobic digestion is limited by high N content (Brune et al, 2009, Wiley et al, 2011 and sludge has been suggested as suitable co-digestion substrate.…”

Section: Introductionmentioning

confidence: 99%

Co-digestion of cultivated microalgae and sewage sludge from municipal waste water treatment

Olsson

Feng

Ascue

et al. 2014

Bioresource Technology

113

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The demand for biogas is continuously growing and the biogas substrate, such as food waste, may soon become limited and it is therefore important for biogas producers to expand the range of substrates. One way can be to use microalgae in co-digestion with sewage sludge.The present study explores the possibilities to use harvested microalgae from Lake Mälaren, as a co-substrate to sewage sludge in biogas production under mesophilic and thermophilic conditions. The aim is to investigate if codigestion of microalgae and sewage sludge is more efficient for biogas production compared using the sludge alone. The study has been carried out as a BMP-experiment (Biochemical Methane Potential) in batch fermentation bottles. The substrate was undigested sludge where 0%, 12 %, 25 % and 37 % were replaced with the cultivated microalgae. The results showed that the use of an algae/bacteria community, cultivated in prior to digestion, can serve as a biomass substrate for biogas production together with municipal wastewater sludge. Co-digestion of microalgae and sewage sludge can be more efficient for biogas production compared to using the sludge alone under mesophilic conditions. It can also be concluded that thermophilic co-digestion between the microalgae and sludge give lower biochemical methane potential.

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Section: Introductionmentioning

confidence: 99%

Co-digestion of cultivated microalgae and sewage sludge from municipal waste water treatment

Olsson

Feng

Ascue

et al. 2014

Bioresource Technology

113

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“…Such high biogas productions at a WWTP can only be achieved by co-digestion, i.e., the AD of waste sludge together with other substrates with higher organic loads (Shen et al, 2015). Co-digestion has become a hot topic in AD research which is witnessed by the dramatic increase in the number of publications on this subject and reviews summarizing the results of this tremendous amount of work (Mata-Alvarez et al, 2011. Co-digestion has not only the advantage to increase the overall biogas production of an AD plant but it also allows to use substrates that are difficult to digest as single substrate due to imbalanced nutrient contents, too rapid digestibility leading to acidification, and presence of inhibitory compounds.…”

mentioning

confidence: 99%

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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“…During the last years much research aimed at modelling the anaerobic digestion of complex organic substrates has been carried out [36]. The mathematical modelling of the digestion process allows to reproduce several empirical behaviours on a computer in a short time.…”

Section: Mathematical Modelmentioning

confidence: 99%

Bio-Methane Potential Tests To Measure The Biogas Production From The Digestion and Co-Digestion of Complex Organic Substrates

Esposito¹,

Frunzo²,

Liotta³

et al. 2012

TOENVIEJ

191

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Bio-methane potential (BMP) tests are widely used in studies concerning the anaerobic digestion of organic solids. Although they are often criticized to be time consumer, with an average length longer than 30 days, such tests are doubtless easy to be conducted, relatively inexpensive and repeatable. Moreover, BMP tests give significant information about the bio-methanation of specific substrates and provide experimental results essential to calibrate and validate mathematical models. These last two aspects have been handled in this work where the following elements have been described in detail: i) the methods used to conduct the BMP tests; ii) the cumulative bio-methane curves obtained from three BMP tests, concerning respectively two pure organic substrates (swine manure-SM and greengrocery waste-GW) and an organic substrate obtained by mixing buffalo manure (BM) and maize silage (MS); iii) the procedure used to calibrate a mathematical model proposed by the authors to simulate the anaerobic digestion process; iv) the results of the calibration process. This paper shows that BMP tests are extremely helpful to determine the amount of bio-methane obtainable from different organic solids and under different operational conditions as well as the biodegradability of the investigated substrate, the relative specific rate of bio-methanation and the synergic effect of multiple co-digested substrates. Furthermore BMP tests represent an interesting tool for the technical and economical optimization of bio-methane producing plants.

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Codigestion of solid wastes: A review of its uses and perspectives including modeling

Cited by 253 publications

References 94 publications

Co-digestion of cultivated microalgae and sewage sludge from municipal waste water treatment

Co-digestion of cultivated microalgae and sewage sludge from municipal waste water treatment

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

Bio-Methane Potential Tests To Measure The Biogas Production From The Digestion and Co-Digestion of Complex Organic Substrates

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