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      Potential of biogas production from swine manure supplemented with glycerine waste Translated title: Potencial de produção de biogás através de dejetos suínos suplementados com glicerina residual

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          Abstract

          In this study, was studied the biogas generation from swine manure, using residual glycerine supplementation. The biogas production by digestion occurred in the anaerobic batch system under mesophilic conditions (35°C), with a hydraulic retention time of 48 days. The experiment was performed with 48 samples divided into four groups, from these, one was kept as a control (without glycerin) and the other three groups were respectively supplemented with residual glycerine in the percentage of 3%, 6% and 9% of the total volume of the samples. The volume of biogas was controlled by an automated system for reading in laboratory scale and the quality of the biogas (CH4) measured from a specific sensor. The results showed that the residual glycerine has high potential for biogas production, with increases of 124.95%, 156.98% and 197.83% in the groups 3%, 6% and 9%, respectively, relative to the sample control. However, very high organic loads can compromise the process of digestion affecting the quality of the biogas generated in relation to methane.

          Translated abstract

          Neste trabalho, estudou-se a geração de biogás a partir de dejetos suínos utilizando suplementação de glicerina residual. A produção de biogás ocorreu por meio de digestão anaeróbia no sistema em batelada sob condições mesofílicas (35°C), com tempo de retenção hidráulica de 48 dias. O experimento foi realizado com 48 amostras divididas em quatro grupos; destes, um se manteve como controle (sem adição de glicerina), e os outros três grupos foram suplementados, respectivamente, com glicerina residual nos percentuais de 3%, 6% e 9% do volume total das amostras. O volume de biogás gerado foi controlado por um sistema automatizado para leitura em escala laboratorial, e a qualidade do biogás (CH4), medida a partir de um sensor específico. Os resultados obtidos demonstraram que a glicerina residual tem potencial para suplementar a produção de biogás, com incrementos de 124,95%, 156,98% e 197,83% nos grupos 3%, 6% e 9%, respectivamente, em relação à amostra-controle. Porém, cargas orgânicas muito elevadas podem comprometer o processo de biodigestão, afetando a qualidade do biogás gerado em relação ao metano.

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          Most cited references19

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          Biogas from Waste and Renewable Resources

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            Anaerobic digestion of glycerol derived from biodiesel manufacturing.

            The anaerobic digestion of glycerol derived from biodiesel manufacturing, in which COD was found to be 1010 g/kg, was studied in batch laboratory-scale reactors at mesophilic temperature using granular and non-granular sludge. Due to the high KOH concentration of this by-product, H(3)PO(4) was added to recover this alkaline catalyst as agricultural fertilizer (potassium phosphates). Although it would not be economically viable, a volume of glycerol was distilled and utilised as reference substrate. The anaerobic revalorisation of glycerol using granular sludge achieved a biodegradability of around 100%, while the methane yield coefficient was 0.306 m(3) CH(4)/kg acidified glycerol. Anaerobic digestion could be a good option for revalorising this available, impure and low priced by-product derived from the surplus of biodiesel companies. The organic loading rate studied was 0.21-0.38 g COD/g VSS d, although an inhibition phenomenon was observed at the highest load.
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              Optimising methane yield from anaerobic digestion of manure: Effects of dairy systems and of glycerine supplementation

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                Author and article information

                Journal
                eagri
                Engenharia Agrícola
                Eng. Agríc.
                Associação Brasileira de Engenharia Agrícola (Jaboticabal, SP, Brazil )
                0100-6916
                1809-4430
                October 2014
                : 34
                : 5
                : 844-853
                Affiliations
                [02] Lajeado RS orgnameUNIVATES fabio.fernades@ 123456naturovos.com.br
                [03] Leipzig orgnameUFZ orgdiv1Helmholtz Centre for Environmental Research orgdiv2Department of Bioenergy Germany alberto.bezama@ 123456ufz.de
                [01] Lajeado RS orgnameUNIVATES orgdiv1Centro de Ciências Exatas e Tecnológicas
                Article
                S0100-69162014000500004 S0100-6916(14)03400500004
                10.1590/S0100-69162014000500004
                27c12092-e35a-4969-8f71-0d662247396e

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 06 May 2014
                : 25 April 2013
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 24, Pages: 10
                Product

                SciELO Brazil

                Categories
                Scientific Papers

                glicerina residual,dejetos suínos,energia renovável,biogas,residual glycerin,biogás,renewable energy,swine manure

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