HTC of Wet Residues of the Brewing Process: Comprehensive Characterization of Produced Beer, Spent Grain and Valorized Residues

Mateusz Jackowski , Łukasz Niedźwiecki , Magdalena Lech , Mateusz Wnukowski , Amit Arora , Monika Tkaczuk-Serafin , Marcin Baranowski , Krystian Krochmalny , Vivek K. Veetil , Przemysław Seruga , Anna Trusek , Halina Pawlak-Kruczek


Steady consumption of beer results in a steady output of residues, i.e., brewer’s spent grain (BSG). Its valorization, using hydrothermal carbonization (HTC) seems sensible. However, a significant knowledge gap regarding the variability of this residue and its influence on the valorization process and its potential use in biorefineries exists. This study attempted to fill this gap by characterization of BSG in conjunction with the main product (beer), taking into accounts details of the brewing process. Moreover, different methods to assess the performance of HTC were investigated. Overall, the differences in terms of the fuel properties of both types of spent grain were much less stark, in comparison to the differences between the respective beers. The use of HTC as a pretreatment of BSG for subsequent use as a biorefinery feedstock can be considered beneficial. HTC was helpful in uniformization and improvement of the fuel properties. A significant decrease in the oxygen content and O/C ratio and improved grindability was achieved. The Weber method proved to be feasible for HTC productivity assessment for commercial installations, giving satisfactory results for most of the cases, contrary to traditional ash tracer method, which resulted in significant overestimations of the mass yield.
Author Mateusz Jackowski - Wrocław University of Science and Technology (PWr)
Mateusz Jackowski,,
, Łukasz Niedźwiecki - Wrocław University of Science and Technology (PWr)
Łukasz Niedźwiecki,,
, Magdalena Lech - Wrocław University of Science and Technology (PWr)
Magdalena Lech,,
, Mateusz Wnukowski - Wrocław University of Science and Technology (PWr)
Mateusz Wnukowski,,
, Amit Arora - Shaheed Bhagat Singh State Technical Campus
Amit Arora,,
, Monika Tkaczuk-Serafin - Wrocław University of Science and Technology (PWr)
Monika Tkaczuk-Serafin,,
, Marcin Baranowski - Wrocław University of Science and Technology (PWr)
Marcin Baranowski,,
, Krystian Krochmalny - Wrocław University of Science and Technology (PWr)
Krystian Krochmalny,,
, Vivek K. Veetil - Wrocław University of Science and Technology (PWr)
Vivek K. Veetil,,
, Przemysław Seruga (PE / DBE)
Przemysław Seruga,,
- Department of Bioprocess Engineering
et al.`
Journal seriesEnergies, [ENERGIES], ISSN 1996-1073, (N/A 140 pkt)
Issue year2020
Publication size in sheets0.95
Article number2058
Keywords in Englishhydrothermal carbonization; hydrochars; beer; brewers spent grain; pyrolysis
ASJC Classification1700 General Computer Science
Languageen angielski
Jackowski_M_Niedzwiecki_L_Lech_M_Wnukowski_M_Arora_A_Tkaczyk-Serafin_M_Baranowski_m_Krochmalny_K_Veetil_V_Seruga_P_Trusek_A_Pawlak-Kruczek_H_HTC_of_Wet_Residues.pdf 3,19 MB
Score (nominal)140
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.156; WoS Impact Factor: 2018 = 2.707 (2) - 2018=2.99 (5)
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UwagaFinancial support of this research from the National Science Centre, Poland–project no. 2019/33/N/ST8/02641, is gratefully acknowledged.
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.