TY  - JOUR
A1  - Tix, Julian
A1  - Moll, Fabian
A1  - Krafft, Simone
A1  - Betsch, Matthias
A1  - Tippkötter, Nils
T1  - Hydrogen production from enzymatic pretreated organic waste with thermotoga neapolitana
JF  - Energies
N2  - Biomass from various types of organic waste was tested for possible use in hydrogen production. The composition consisted of lignified samples, green waste, and kitchen scraps such as fruit and vegetable peels and leftover food. For this purpose, the enzymatic pretreatment of organic waste with a combination of five different hydrolytic enzymes (cellulase, amylase, glucoamylase, pectinase and xylase) was investigated to determine its ability to produce hydrogen (H2) with the hydrolyzate produced here. In course, the anaerobic rod-shaped bacterium T. neapolitana was used for H2 production. First, the enzymes were investigated using different substrates in preliminary experiments. Subsequently, hydrolyses were carried out using different types of organic waste. In the hydrolysis carried out here for 48 h, an increase in glucose concentration of 481% was measured for waste loads containing starch, corresponding to a glucose concentration at the end of hydrolysis of 7.5 g·L−1. In the subsequent set fermentation in serum bottles, a H2 yield of 1.26 mmol H2 was obtained in the overhead space when Terrific Broth Medium with glucose and yeast extract (TBGY medium) was used. When hydrolyzed organic waste was used, even a H2 yield of 1.37 mmol could be achieved in the overhead space. In addition, a dedicated reactor system for the anaerobic fermentation of T. neapolitana to produce H2 was developed. The bioreactor developed here can ferment anaerobically with a very low loss of produced gas. Here, after 24 h, a hydrogen concentration of 83% could be measured in the overhead space.
KW  - Biological hydrogen
KW  - Organic waste
KW  - Dark fermentation
KW  - Hydrolysis
KW  - Pretreatment
Y1  - 2024
U6  - https://doi.org/10.3390/en17122938
SN  - 1996-1073
N1  - Corresponding author: Nils Tippkötter
VL  - 17
IS  - 12
PB  - MDPI
CY  - Basel
ER  -