Improvement of a grass-clover silage-fed biogas process by the addition of cobalt

Jarvis, Åsa; Nordberg, Åke; Jarlsvik, Tisse; Mathisen, Berit; Svensson, Bo

doi:10.1016/s0961-9534(97)00015-9

Cited by 80 publications

(51 citation statements)

References 16 publications

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“…In such cases, the loading capacity of the system can be improved by adding more of the limiting nutrients, which will improve the microbial growth rate. Cobalt has in many cases been shown to be rate-limiting and its subsequent addition has been reported to affect the transformation of VFAs [26][27][28]. The present authors' experience of the addition of Co is that levels below 0.1 mg Co L -1 reactor volume can be rate-limiting at loadings exceeding 2.5 g VS L -1…”

Section: Cobalt Additionmentioning

confidence: 74%

Anaerobic treatment of activated sludge from Swedish pulp and paper mills – biogas production potential and limitations

Karlsson

Truong

Gustavsson

et al. 2011

Environmental Technology

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Section: Cobalt Additionmentioning

confidence: 74%

Anaerobic treatment of activated sludge from Swedish pulp and paper mills – biogas production potential and limitations

Karlsson

Truong

Gustavsson

et al. 2011

Environmental Technology

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“…• adjustment of the carbon to nitrogen ratio with nutrients addition or co-digestion; 71,72 • addition of trace metals; [73][74][75][76] • integration of cost-ef ective thermochemical or/and enzymatic pre-treatments;…”

Section: Concerns and Future Trends For The Optimization Of The Net Ementioning

confidence: 99%

Biomethane production from starch and lignocellulosic crops: a comparative review

Frigon

Guiot

2010

Biofuels Bioprod Bioref

218

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The methane produced from the anaerobic digestion of organic wastes and energy crops represents an elegant and economical means of generating renewable biofuel. Anaerobic digestion is a mature technology and is already used for the conversion of the organic fraction of municipal solid wastes and excess primary and secondary sludge from waste‐water treatment plants. High methane yield up to 0.45 m3 STP CH4/kg volatile solids (VS) or 12 390 m3 STP CH4/ ha can be achieved with sugar and starch crops, although these cultures are competing with food and feed crops for high‐quality land. The cultivation of lignocellulosic crops on marginal and set‐aside lands is a more environmentally sound and sustainable option for renewable energy production. The methane yield obtained from these crops is lower, 0.17–0.39 m3 STP CH4/kg VS or 5400 m3 STP CH4/ha, as its conversion into methane is facing the same initial barrier as for the production of ethanol, for example, hydrolysis of the crops. Intensive research and development on efficient pre‐treatments is ongoing to optimize the net energy production, which is potentially greater than for liquid biofuels, since the whole substrate excepted lignin is convertible into methane. Copyright © 2010 Crown in the right of Canada

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“…For efficient growth of all methanogenic bacteria relatively high levels of iron, nickel and cobalt are required (Ram et al, 2000). However, optimal concentrations of iron, nickel and cobalt were found in the digested residues in very wide variations (Gonzales-Gill et al, 1993;Jarvis et al, 1997;Mochinaga et al, 1997;Takashima & Speece, 1997;Basiliko & Yavitt, 2001;Kida et al, 2001). Such variations can be explained by presence of different varieties of methanogenic bacteria in the substrates and their different and particular needs for iron and cobalt.…”

Section: Rapeseed Cake As Substrate In Anaerobic Digestionmentioning

confidence: 99%

Reuse of rapeseed by-products from biodiesel production

Krička

Matin

Voća

et al. 2015

Span. j. agric. res.

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The objective of this paper is to investigate usability of rapeseed cake from biodiesel fuel production as an energy source. For this research, rapeseed was grown at the research site of the Faculty of Agriculture in Zagreb, Croatia. The investigated rapeseed cake, residue from cold pressing, was divided in two groups of samples. The first group was a mix of three varieties (Bristol, Express and Navajo), while the other group consisted of three hybrids (Artus, Baldur, Titan). The utilization of rapeseed cake for energy via two routes was evaluated; namely, utilization of rapeseed cake as (1) solid biofuel (pellets) with addition of 3% of glycerol, and (2) as substrate in anaerobic digestion (AD). In investigation of cake as solid fuel, proximate (moisture content, ash content, fixed carbon and volatile matter), ultimate (content of carbon, sulphur, hydrogen, oxygen and nitrogen) and physical and calometry analyses (abrasion, diameter, length, density, higher and lower heating value were carried out. As for its use in AD, production of biogas during 40 days was monitored with a view of assessing the use of digested residue as fertilizer in agricultural production. Both groups of digested residues were analysed (pH, electroconductivity, moisture content, ash content, content of nitrogen and carbon, C/N ratio, content of P 2 O 5 , K 2 O, Ca, Mg, Na). The analysis indicated that the investigated raw material is usable as solid and gas biofuel, and digested residue as fertilizer in ecological agriculture. The two groups of samples analysed here did not show significant differences. Additional keywords: rapeseed cake; Brassica napus; pressing; pelletizing; biogas production; proximate and ultimate analysis Abbreviations used: AD (anaerobic digestion); D (diameter); EC (electroconductivity); EU (European Union); HHV (higher heating value); L (lenght); LHV (lower heating value) Citation: Krička, T.; Jurišić, V.; Bilandžija, N. (2015). Reuse of rapeseed by-products from biodiesel production. Spanish Journal of Agricultural Research, Volume 13, Issue 1, e02-007, 9 pages. http://dx

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Improvement of a grass-clover silage-fed biogas process by the addition of cobalt

Cited by 80 publications

References 16 publications

Anaerobic treatment of activated sludge from Swedish pulp and paper mills – biogas production potential and limitations

Anaerobic treatment of activated sludge from Swedish pulp and paper mills – biogas production potential and limitations

Biomethane production from starch and lignocellulosic crops: a comparative review

Reuse of rapeseed by-products from biodiesel production

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