Volume: 3, 2024
3rd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland:
ENVIRONMENT – PLANT – ANIMAL – PRODUCT
Abstract number: E015
DOI: https://doi.org/10.24326/ICDSUPL3.E015
Published online: 24 April 2024
ICDSUPL, 3, E015 (2024)
New technology for recover water from digestate from agricultural biogas plant
Mateusz Nowak1*, Wojciech Czekała1, Wiktor Bojarski1
1 Department of Biosystems Engineering, Faculty of Environmental and Mechanical Engineering, Poznan University of Life Sciences, Wojska Polskiego 50, 60-627 Poznan, Poland
* Corresponding author: mateusz.nowak@up.poznan.pl
Abstract
The amount of the digestate is continuously growing with the increase in the number of biogas plants worldwide. One of them is high water content. In order to further management of the digestate, e.g. as fertilizer, a proper solution may be its dewatering, which will improve the fertilizer value of the digestate. So far, in order to separate the solid and liquid fractions, mechanical methods such as screw presses or centrifuges have been used. This paper aim a new method for dewatering the digestate from one of Poland’s biogas plants. In addition, an analysis was made of the effectiveness of the innovative technology applied under laboratory conditions. The method described in this paper is based on the evaporation and condensation of water vapor on the interior surface of the dome. The dewatering process was conducted for conditions similar to those that occur during mesophilic fermentation. During the conducted tests, the digestate from the operating biogas plant was used. A significant reduction in the volume of digestate and condensate discharge was also observed. The economic analysis carried out in the study made it possible to demonstrate the real savings associated with the management of the digestate according to R10 recovery. In the most favorable variant using this type of dewatering are possible savings of about 100 thousand EUR. The technology under study is characterized by high potential, which makes it possible to manage the water and substrate management of the biogas plant more efficiently. This kind of research are the ideal answer for biogas plant’s circular economy.
Keywords: digestate, dewatering, solid fraction, liquid fraction, circular economy
How to cite
M. Nowak, W. Czekała, W. Bojarski, 2024. New technology for recover water from digestate from agricultural biogas plant. In: 3rd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland: Environment – Plant – Animal – Product. https://doi.org/10.24326/ICDSUPL3.E015