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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Two-stage anaerobic digestion of orange peel without pre-treatment: Experimental evaluation and application to Sao Paulo state

Texto completo
Jimenez-Castro, Maria Paula [1] ; Buller, Luz Selene [1] ; Zoffreo, Alexis [2] ; Timko, Michael T. [2] ; Forster-Carneiro, Tania [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Campinas UNICAMP, Sch Food Engn, Rua Monteiro Lobato 80, BR-13083862 Campinas, SP - Brazil
[2] Worcester Polytech Inst, Dept Chem Engn, 100 Inst Rd, Goddard Hall 123, Worcester, MA 01609 - USA
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Citações Web of Science: 3

Orange juice production is an important industry worldwide, specifically in Brazil, which is the leading producer. Nevertheless, approximately 50 % of the feed used for industrial production of orange juice is wasted, primarily as peels, a promising raw material for being used in the different biotechnological processes. This study evaluated the potential of two-stage anaerobic digestion (reactor of 4.3 L total volume) to valorize orange juice residues. The system replaced the use of other pretreatments and increased methane concentration (approximately 60 % compared with about 50 %) and volume (by 13 %) relative to one-stage anaerobic digestion. The accumulated biogas yield was 0.79 L/g SVT and 0.49 L/g SVT for the methanogenic and control reactors, respectively. Also, the anaerobic reactors were able to start-up with high solids feed, which could be applied to the Upflow Anaerobic Sludge Blanket (UASB) reactors currently in operation in the citrus juice industry. The potential electric power generated was estimated as 97.5 x 10(3) MWh/year, which might be used on-site or sold back to the energy grid where it represents 0.2 % of the total energy used by Sao Paulo State. The potential greenhouse gas mitigation from the substitution of electric energy from the Brazilian energy grid to a more renewable one from biogas burning was estimated to be 9.05 x 10(3) tCO(2)eq/year. The results demonstrated that two-stage anaerobic digestion is a promising technology for the disposal of orange peel waste while producing a useful bioenergy product. (AU)

Processo FAPESP: 18/14938-4 - Waste2energy: integração das tecnologias supercrítica e digestão anaeróbia através de um sistema automatizado para produção de precursores de biocombustíveis
Beneficiário:Tânia Forster Carneiro
Linha de fomento: Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2
Processo FAPESP: 18/05999-0 - Waste2energy: integração das tecnologias supercrítica e digestão anaeróbia para gestão de águas e resíduos alimentares
Beneficiário:Tânia Forster Carneiro
Linha de fomento: Auxílio à Pesquisa - Regular