INVESTIGATION OF ENERGY PARAMETERS OF BIOMATERIAL CONVERSION PROCESS IN CLOSED FERMENTATION CHAMBER

Keywords: biochemical conversion, bio raw materials, drum reactor, substrate, compost.

Abstract

Fermentation of bio-raw materials in closed fermentation chambers is one of the promising methods of composting production, which is developing intensively . However, one of the unresolved issues in the fermentation of bio-based substrates in closed chambers is the low efficiency associated with energy losses. In order to study the energy parameters of the fermentation process of bio raw materials, the design of a closed fermentation chamber was developed and presented. It is established that the temperature parameters at each of the fermentation phases of the substrate are an important factor influencing the efficiency of the entire compost production. It is experimentally determined that the optimal temperatures at each of the fermentation phases are: the phase of heating the substrate - up to 20 ° C; mesophilic phase - from 20 to 42 °C; thermophilic phase - from 42 to 65 °C; ripening phase - from 65 °C to ambient temperature. Providing the specified temperature regime at each of the fermentation phases allows to make the composting process manageable and to obtain high quality composts in accordance with biotechnological norms. It has been experimentally investigated that most energy is lost due to convection in the thermophilic phase of composting. The highest values of the convective heat transfer coefficient were 1.6… 1.7 W/(m2 · °С) at the process temperature equal to 61… 62 °С and took place at 108… 132 hours of the composting process. At the 132nd hour of the process, the value of the heat transfer coefficient was 8.5 W per kilogram of organic matter of the substrate, and the total amount of heat released from a kilogram of organic matter of the substrate reached 2 MJ / kg. Although the internal energy of the substrate increased sharply during the thermophilic phase of composting of raw materials, only 5% of this energy was used to meet the energy needs of the process. Analysis of process parameters shows that about 95% of the heat produced during composting is lost through convection, thermal radiation and during aeration of the substrate with air. These losses can be reduced by developing appropriate thermal support: thermal insulation of the outer surfaces of the chambers, the use of heaters. Ref. 8, fig. 4.

Author Biographies

M. Tereshchuk, Polissia National University, 10008, 7 Stary Blvd., Zhytomyr, Ukraine.

tereshuk.pngAuthor information: Zhytomyr National Agroecological University, Ph.D, graduate student of the Mechanics and agroecosystems engineering Department
Education: Zhytomyr National Agroecological University
Research area: organic waste utilization
Publications: 20 scientific publications, including 10 conference proceedings

S. Klius, Institute of Renewable Energy of the National Academy of Sciences of Ukraine, 02094, 20А Hnata Khotkevycha St., Kyiv, Ukraine.

klius1.jpgAuthor information: Institute of Renewable Energy of NAS of Ukraine, senior researcher. PhD since 2016 year.
Education: Sumy State University, master of equipment of chemical productions and building materials enterprises.
Research area: bioenergy, gasification of biomass, organic waste utilization.
Publications: more than 30 scientific publications, including 11 patents.

N. Tsyvenkova, National University of Life and Environmental Sciences of Ukraine, 03041, 15 Heroyiv Oborony St., Kyiv, Ukraine.

img222.pngAuthor information: National University of Life and Environmental Sciences of Ukraine, Ph.D, assis. prof., the Tractors, Automobiles, and Bioenergy Systems Department, Mechanical and Technological faculty
Research area: energy saving, alternative energy, bionergetic systems and complex
Publications: 108 scientific papers (including 48 scientific papers, which are published in Ukrainian peer-reviewed journals, and 14 – in Scopus/WoS)

V. Chuba, National University of Life and Environmental Sciences of Ukraine, 03041, 15 Heroyiv Oborony St., Kyiv, Ukraine.

chuba.pngAuthor information: National University of Life and Environmental Sciences of Ukraine, Ph.D, head of Tractors, Automobiles, and Bioenergy Systems Department, Mechanical and Technological faculty
Research area: bioenergy systems, agroecosystems technical support, biofuels
Publications: 114 scientific publications, of which 27 in Scopus referred journals, 19 patents models, co-author of two textbooks and 5 monographs

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Published
2021-03-30
How to Cite
Tereshchuk, M., Klius, S., Tsyvenkova, N., & Chuba, V. (2021). INVESTIGATION OF ENERGY PARAMETERS OF BIOMATERIAL CONVERSION PROCESS IN CLOSED FERMENTATION CHAMBER. Vidnovluvana Energetika, (1(64), 87-97. https://doi.org/10.36296/1819-8058.2021.1(64).87-97