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Substituting energy crops with organic wastes and agro-industrial residues for biogas production

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Abstract.
In this study, industrial and agro-industrial by-products and residues (BRs), animal manures (AMs), and
various types of organic wastes (OWs) were analyzed to evaluate their suitability as substitutes for
energy crops (ECs) in biogas production. A comparison between the costs of the volume of biogas that
can be produced from each substrate was presented with respect to the prices of the substrates in the
Italian market. Furthermore, four different feeding mixtures were compared with a mixture of EC and
swine manure (Mixture A) used in a full-scale plant in Italy. Swine manure is always included as a basic
substrate in the feeding mixtures, because many of the Italian biogas plants are connected to farms.
When EC were partially substituted with BR (Mixture B), the cost (0.28 E Nm-3) of the volume of biogas
of Mixture A dropped to 0.18 E Nm-3. Furthermore, when the organic fraction of municipal solid waste
(OFMSW) and olive oil sludge (OS) were used as possible solutions (Mixtures C and D), the costs of the
volume of biogas were 0.20 and 0.11 E Nm-3, respectively. The negative price signifies that operators
earn money for treating the waste. For the fifth mix (Mixture E) of the OFMSW with a high solid
substrate, such as glycerin from biodiesel production, the resulting cost of the volume of biogas produced
was 0.09 E Nm-3. By comparing these figures, it is evident that the biogas plants at farm level are good
candidates for treating organic residues of both municipalities and the agro-industrial sector in a costeffective way, and in providing territorially diffused electric and thermal power. This may represent
a potential development for agrarian economy.

Keywords: Anaerobic digestion, Anaerobic biogasification potential, Biofuels, Energy crops, Organic waste, Glycerin

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Informasi Detail

Judul Seri

Journal of Environmental Management

No. Panggil

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Penerbit

London : Elsevier Ltd.., 2009

Deskripsi Fisik

Journal of Environmental Management 90 (2009) 2537–2541

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

LINGKUNGAN HIDUP

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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