<abstract xmlns="http://www.w3.org/1999/xhtml">The results of anaerobic digestion (AD) of buttermilk (BM) and cheese whey (CW) with a digested sewage sludge as inoculum is described. The substrate/inoculum mixtures were prepared using 10% buttermilk and 15% cheese whey. The essential parameters of the materials were described, including: total solids (TS), volatile solids (VS), pH, conductivity, C/N ratio (the quantitative ratio of organic carbon (C) to nitrogen (N)), alkalinity, chemical oxygen demand (COD). The potential directions of biodegradation of the organic waste types, as used in this study, are also presented. Appropriate chemical reactions illustrate the substrates and products in each phase of anaerobic decomposition of the compounds that are present in buttermilk and cheese whey: lactic acid, lactose, fat, and casein. Moreover, the biogas and biomethane production rates are compared for the substrates used in the experiment. The results have shown that buttermilk in AD generates more biogas (743 m3/Mg VS), including methane (527 m3/Mg VS), when compared with cheese whey (600 m3/Mg VS, 338 m3/Mg VS for biogas and methane, respectively).</abstract>

The results of anaerobic digestion (AD) of buttermilk (BM) and cheese whey (CW) with a digested sewage sludge as inoculum is described. The substrate/inoculum mixtures were prepared using 10% buttermilk and 15% cheese whey. The essential parameters of the materials were described, including: total solids (TS), volatile solids (VS), pH, conductivity, C/N ratio (the quantitative ratio of organic carbon (C) to nitrogen (N)), alkalinity, chemical oxygen demand (COD). The potential directions of biodegradation of the organic waste types, as used in this study, are also presented. Appropriate chemical reactions illustrate the substrates and products in each phase of anaerobic decomposition of the compounds that are present in buttermilk and cheese whey: lactic acid, lactose, fat, and casein. Moreover, the biogas and biomethane production rates are compared for the substrates used in the experiment. The results have shown that buttermilk in AD generates more biogas (743 m3/Mg VS), including methane (527 m3/Mg VS), when compared with cheese whey (600 m3/Mg VS, 338 m3/Mg VS for biogas and methane, respectively).

Treatment of dairy waste by anaerobic co-digestion with sewage sludge

Institute of Food Technology of Plant Origin, Poznan University of Life Sciences, ul. Wojska Polskiego 28, 60-637 Poznań, Poland, phone +48 61 848 73 08

Institute of Biosystems Engineering, Poznan University of Life Sciences, ul. Wojska Polskiego 28, 60-637 Poznań, Poland

Institute of Chemical Wood Technology, Poznan University of Life Sciences, ul. Wojska Polskiego 28, 60-637 Poznań, Poland

Department of Research and Development, Aquanet S.A., Dolna Wilda 126, 61-492 Poznań, Poland

Centre of Advanced Technologies, Adam Mickiewicz University, ul. Umultowska 89C, 61-614 Poznań, Poland

Ecological Chemistry and Engineering S

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Treatment of dairy waste by anaerobic co-digestion with sewage sludge"}

The results of anaerobic digestion (AD) of buttermilk (BM) and cheese whey (CW) with a digested sewage sludge as inoculum is described. The substrate/inoculum...

Treatment of dairy waste by anaerobic co-digestion with sewage sludge

Published Online: Apr 09, 2016

Page range: 99 - 115

DOI: https://doi.org/10.1515/eces-2016-0007

Keywords
anaerobic digestion, cheese whey, buttermilk, digested sewage sludge, biodegradation, biomethane efficiency

© 2016 Agnieszka A. Pilarska et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Treatment of dairy waste by anaerobic co-digestion with sewage sludge

Published Online: Apr 09, 2016

Page range: 99 - 115

DOI: https://doi.org/10.1515/eces-2016-0007

Keywordsanaerobic digestion, cheese whey, buttermilk, digested sewage sludge, biodegradation, biomethane efficiency

© 2016 Agnieszka A. Pilarska et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
anaerobic digestion, cheese whey, buttermilk, digested sewage sludge, biodegradation, biomethane efficiency