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Agrochemical value of organic matter of fermenter wastes in biogas production

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  • L. Kolář

    (Agricultural Faculty, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic)

  • S. Kužel

    (Agricultural Faculty, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic)

  • J. Peterka

    (Agricultural Faculty, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic)

  • P. Štindl

    (Agricultural Faculty, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic)

  • V. Plát

    (Agricultural Faculty, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic)

Abstract

We performed 28-day mesophilic fermentation of a mixture of pig slurry and primary (raw) sludge from the sedimentation stage of a wastewater treatment plant at a 1:1 ratio. The components and the original and fermented mixture of slurry and sludge were subjected to acid hydrolysis. Dry matter of the solid phase of both components and both mixtures was incubated with sandy-loamy Cambisol at a weight ratio 3:1 at 25°C for 20 weeks; in 14-day intervals lipids, crude protein, hemicelluloses, cellulose, lignin, total nitrogen and hot-water-insoluble solids were determined. Changes in ion-exchange and buffering capacity of the test materials were recorded. Labile organic matters were determined after 20 weeks of incubation. Liquid fractions of both components and their mixtures were analysed before and after anaerobic fermentation. It was concluded that beneficial effects of wastes as fertilisers from anaerobic digestion could be attributed to their liquid fraction. After anaerobic digestion the solid fraction of these wastes has relatively increased ion exchange capacity as well as buffering capacity but it is very stable, hardly degradable organic matter, and therefore it cannot play the role of organic matter in soil. This is the reason why it should not be considered as an organic fertiliser.

Suggested Citation

  • L. Kolář & S. Kužel & J. Peterka & P. Štindl & V. Plát, 2008. "Agrochemical value of organic matter of fermenter wastes in biogas production," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 54(8), pages 321-328.
    • Handle: RePEc:caa:jnlpse:v:54:y:2008:i:8:id:412-pse
    DOI: 10.17221/412-PSE
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    References listed on IDEAS

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    1. Ladislav Kolář & Rostislav Ledvina & Stanislav Kužel & František Klimeš & Pavel Štindl, 2006. "Soil Organic Matter and its Stability in Aerobic and Anaerobic Conditions," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 1(2), pages 57-64.
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    Cited by:

    1. L. Kolář & S. Kužel & J. Peterka & J. Borová-Batt, 2010. "Agrochemical value of the liquid phase of wastes from fermentem during biogas production," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 56(1), pages 23-27.
    2. T. Lošák & J. Hlušek & T. Válka & J. Elbl & T. Vítěz & H. Bělíková & E. Von Bennewitz, 2016. "The effect of fertilisation with digestate on kohlrabi yields and quality," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 62(6), pages 274-278.
    3. L. Kolář & J. Frelich & J. Brouček & S. Kužel & J. Borová-Batt & J. Peterka & M. Šlachta & K. Volfová & J. Pezlarová & J. Hřebečková & V. Čechová, 2010. "Anaerobic degradability of organic matter of cattle faeces and a possibility of its utilization," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 55(12), pages 538-547.

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