![Biogas production from maize and dairy cattle manure-Influence of biomass composition on the methane yield [An article from: Agriculture, Ecosystems and Environment]](https://www.ebooknetworking.net/books/B00/0PC/bigB000PC0F26.jpg)
Biogas production from maize and dairy cattle manure-Influence of biomass composition on the methane yield [An article from: Agriculture, Ecosystems and Environment]
Book Details
PublisherElsevier
ISBN / ASINB000PC0F26
ISBN-13978B000PC0F26
AvailabilityAvailable for download now
Sales Rank13,539,735
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Agriculture, Ecosystems and Environment, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
There is an increasing world wide demand for energy crops and animal manures for biogas production. To meet these demands, this research project aimed at optimising anaerobic digestion of maize and dairy cattle manures. Methane production was measured for 60 days in 1l eudiometer batch digesters at 38^oC. Manure received from dairy cows with medium milk yield that were fed a well balanced diet produced the highest specific methane yield of 166.3NlCH"4kgVS^-^1. Thirteen early to late ripening maize varieties were grown on several locations in Austria. Late ripening varieties produced more biomass than medium or early ripening varieties. On fertile locations in Austria more than 30MgVSha^-^1 can be produced. The methane yield declined as the crop approaches full ripeness. With late ripening maize varieties, yields ranged between 312 and 365NlCH"4kgVS^-^1 (milk ripeness) and 268-286NlCH"4kgVS^-^1 (full ripeness). Silaging increased the methane yield by about 25% compared to green, non-conserved maize. Maize (Zea mays L.) is optimally harvested, when the product from specific methane yield and VS yield per hectare reaches a maximum. With early to medium ripening varieties (FAO 240-390), the optimum harvesting time is at the ''end of wax ripeness''. Late ripening varieties (FAO ca. 600) may be harvested later, towards ''full ripeness''. Maximum methane yield per hectare from late ripening maize varieties ranged between 7100 and 9000Nm^3CH"4ha^-^1. Early and medium ripening varieties yielded 5300-8500Nm^3CH"4ha^-^1 when grown in favourable regions. The highest methane yield per hectare was achieved from digestion of whole maize crops. Digestion of corns only or of corn cob mix resulted in a reduction in methane yield per hectare of 70 and 43%, respectively. From the digestion experiments a multiple linear regression equation, the Methane Energy Value Model, was derived that estimates methane production from the composition of maize. It is a helpful tool to optimise biogas production from energy crops. The Methane Energy Value Model requires further validation and refinement.
Description:
There is an increasing world wide demand for energy crops and animal manures for biogas production. To meet these demands, this research project aimed at optimising anaerobic digestion of maize and dairy cattle manures. Methane production was measured for 60 days in 1l eudiometer batch digesters at 38^oC. Manure received from dairy cows with medium milk yield that were fed a well balanced diet produced the highest specific methane yield of 166.3NlCH"4kgVS^-^1. Thirteen early to late ripening maize varieties were grown on several locations in Austria. Late ripening varieties produced more biomass than medium or early ripening varieties. On fertile locations in Austria more than 30MgVSha^-^1 can be produced. The methane yield declined as the crop approaches full ripeness. With late ripening maize varieties, yields ranged between 312 and 365NlCH"4kgVS^-^1 (milk ripeness) and 268-286NlCH"4kgVS^-^1 (full ripeness). Silaging increased the methane yield by about 25% compared to green, non-conserved maize. Maize (Zea mays L.) is optimally harvested, when the product from specific methane yield and VS yield per hectare reaches a maximum. With early to medium ripening varieties (FAO 240-390), the optimum harvesting time is at the ''end of wax ripeness''. Late ripening varieties (FAO ca. 600) may be harvested later, towards ''full ripeness''. Maximum methane yield per hectare from late ripening maize varieties ranged between 7100 and 9000Nm^3CH"4ha^-^1. Early and medium ripening varieties yielded 5300-8500Nm^3CH"4ha^-^1 when grown in favourable regions. The highest methane yield per hectare was achieved from digestion of whole maize crops. Digestion of corns only or of corn cob mix resulted in a reduction in methane yield per hectare of 70 and 43%, respectively. From the digestion experiments a multiple linear regression equation, the Methane Energy Value Model, was derived that estimates methane production from the composition of maize. It is a helpful tool to optimise biogas production from energy crops. The Methane Energy Value Model requires further validation and refinement.
