Effects of mechanical pre-treatment on the biogas yield from ley crop silage

Lindmark, Johan; Leksell, Niklas; Schnürer, Anna; Thorin, Eva

doi:10.1016/j.apenergy.2011.12.066

Cited by 58 publications

(34 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The inhibited control digester and the low biogas production of test series D during the exponential phase may be an effect of the amount and quality of inoculum, leading to instabilities in the batch digestion experiment. However, similar inhibitions when digesting ley crop silage have been seen in previous studies [23]. The inoculum can affect digestion dynamics and the rate of digestion, but it has little effect on the extent of the anaerobic degradation and final biogas production reached [24].…”

Section: At 75 Days Test Series B and D Show A Clear Statisticalmentioning

confidence: 56%

Evaluating the Effects of Electroporation Pre-treatment on the Biogas Yield from Ley Crop Silage

Lindmark

Lagerkvist

Nilsson

et al. 2014

Appl Biochem Biotechnol

Self Cite

View full text Add to dashboard Cite

Exploiting the full biogas potential of some types of biomass is challenging. The complex structures of lignocellulosic biomass are difficult to break down and thus require longer retention times for the nutrients to become biologically available. It is possible to increase the digestibility of the substrate by pre-treating the material before digestion. This paper explores a pre-treatment of ley crop silage that uses electrical fields, known as electroporation (EP). Different settings of the EP equipment were tested, and the results were analyzed using a batch digestion setup. The results show that it is possible to increase the biogas yield with 16 % by subjecting the substrates to 65 pulses at a field strength of 96 kV/cm corresponding to a total energy input of 259 Wh/kg volatile solid (VS). However, at 100 pulses, a lower field strength of 48 kV/cm and the same total energy input, no effects of the treatment were observed. The energy balance of the EP treatment suggests that the yield, in the form of methane, can be up to double the electrical energy input of the process.

show abstract

Section: At 75 Days Test Series B and D Show A Clear Statisticalmentioning

confidence: 56%

Evaluating the Effects of Electroporation Pre-treatment on the Biogas Yield from Ley Crop Silage

Lindmark

Lagerkvist

Nilsson

et al. 2014

Appl Biochem Biotechnol

Self Cite

View full text Add to dashboard Cite

show abstract

“…Physical, chemical or biological manipulation of biomass prior to anaerobic digestion can enhance methane yield without the need to significantly alter AD design or operational conditions. Whilst various techniques have been widely examined and reported in the literature [5,[47][48][49][50][51][52][53], full-scale applications of pre-treatment are relatively limited and information on the efficiency of various technologies and their impact on the whole AD system is often lacking. In addition, the pre-treatment techniques generally reported in the literature are often energy intensive and therefore may have implications in terms of overall economic feasibility and environmental sustainability [54].…”

Section: Pre-treatment Of Biomassmentioning

confidence: 99%

“…Menardo [6] demonstrated that particle size reduction by simple mechanical pre-treatment improved the methane productivity from AD of agricultural residues by up to 80%. Lindmark and Leksell [49] illustrated that grinding of ley crop silage using commercial scale technologies (Grubben deflaker and Krimer disperser) led to an increase in methane production of up to 59%.…”

Section: Mechanical/chemical Pre-treatmentmentioning

confidence: 99%

Anaerobic Digestion

Melville¹,

Weger²,

Wiesgickl³

et al. 2014

Transformation of Biomass

View full text Add to dashboard Cite

“…The results from the previous studies by the authors on pre-treatment and membrane filtration of the process water [5,6,16] presented in Table 1 and 2 were used to estimate what it would mean for the full-scale biogas plant if these measures are taken. The results of the studies were also converted to the same form to be able to compare them.…”

Section: Potential For Biogas Plant Performance Improvements By Pre-tmentioning

confidence: 99%

“…Therefore pre-treatment of the ley crop silage to increase the digestion rate is of interest to improve the performance of the plant. Mechanical pre-treatment and pre-treatment by electroporation of ley crop silage has previously been studied by the authors [5,6]. In the mechanical pre-treatment tests two commercial available grinding machines for recovering of fibres from recycled paper were used, GLD 360 HW and KD 450 from Cellwood Machinery AB.…”

Section: Introductionmentioning

confidence: 99%

Performance optimization of the Växtkraft biogas production plant

et al. 2012

Self Cite

View full text Add to dashboard Cite

All over the world there is a strong interest and also potential for biogas production from organic residues as well as from different crops. However, to be commercially competitive with other types of fuels, efficiency improvements of the biogas production process are needed. In this paper, results of improvements studies done on a full scale co-digestion plant are presented In the plant organic wastes from households and restaurants are mixed and digested with crops from graze land. The areas for improvements of the plant addressed are treatment of the feed material to enhance the digestion rate, limitation of the ballast of organics in the water stream recirculated in the process, and use of the biogas plant residues at farms. Results from previous studies on pre-treatment and membrane filtration of recirculated process water are combined for estimation of the total improvement potential. Further, the possibility to use neural networks to predict biogas production using historical data from the full-scale biogas plant was investigated. Results from investigation of using the process residues as fertilizer are also presented.The results indicates a potential to increase the biogas yield from the process with up to over 30 % with pre-treatment of the feed and including membrane filtration in the process. Neural networks have the potential to be used for prediction of biogas production. Further, it is shown that the residues from biogas production can be used as fertilizers but that the emission of N 2 O from the fertilised soil is dependent on the soil type and spreading technology.

show abstract

Effects of mechanical pre-treatment on the biogas yield from ley crop silage

Cited by 58 publications

References 11 publications

Evaluating the Effects of Electroporation Pre-treatment on the Biogas Yield from Ley Crop Silage

Evaluating the Effects of Electroporation Pre-treatment on the Biogas Yield from Ley Crop Silage

Anaerobic Digestion

Performance optimization of the Växtkraft biogas production plant

Contact Info

Product

Resources

About