Joachim Venus

Toward Waste-Minimising Biorefineries: Integrating Fermentation and Hydrothermal Fulvification of Grass

Saman Ghobadian, Roland Schneider, Giulia Ischia, Marcus Fischer et autres

Biochemistry-based biorefineries frequently valorize agricultural residues but rarely achieve full carbon utilization, leaving substantial downstream solids and liquids underexploited. This study presents an integrated fermentation–hydrothermal fulvification (HTF) strategy that upgrades grass biomass into lactic acid and artificial humic substances. Acid pretreatment generated …

Integrated pretreatment and fermentation strategies for L‐lactic acid production from brewers' spent grain using native Streptococcus infantarius and Bacillus coagulans

Monica Olvera, Carmen G. Hernández‐Valencia, Carmina Montiel, Agata Olszewska‐Widdrat et autres

Abstract BACKGROUND Brewers' spent grain (BSG) is an abundant lignocellulosic byproduct of the brewing industry with strong potential as a renewable substrate for biotechnological production of lactic acid (LA). This study evaluated integrated pretreatment, enzymatic hydrolysis, and fermentation strategies to enable efficient …

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Toward Waste-Minimising Biorefineries: Integrating Fermentation and Hydrothermal Fulvification of Grass

Saman Ghobadian, Roland Schneider, Giulia Ischia, Marcus Fischer et autres

Biochemistry-based biorefineries frequently valorize agricultural residues but rarely achieve full carbon utilization, leaving substantial downstream solids and liquids underexploited. This study presents an integrated fermentation-hydrothermal fulvification (HTF) strategy that upgrades grass biomass into lactic acid and artificial humic substances. Acid pretreatment generated …

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Interpretable domain adaptation enables robust lactic acid fermentation monitoring from waste

Majharulislam Babor, Shanghua Liu, Arman Arefi, Agata Olszewska‐Widdrat et autres

• Transferring predictive models without chemical analysis from the new environment. • Addressing FTIR shifts using DANN-R, DeepCORAL-R, DARE-GRAM, and TCA methods. • Improving transparency and reliability in glucose and lactic acid predictions. • Enhancing monitoring accuracy with ShapDA by identifying domain-invariant …

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Kontinuierliche Kultivierung auf Basis biogener Roh- und Reststoffe

Linda Schroedter, Joachim Venus

Abstract The upcoming bioeconomy strategy of the European Union will have a strong focus on sustainable and circular use of biological resources. In this regard, use of waste-, residue- or untapped biogenic resources will allow the development of new value chains. For …

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Scale-up study on fermentative succinic acid production from wheat straw following a cascading biorefinery approach

Linda Schroedter, Roland Schneider, Joachim Venus

Succinic acid, as a valuable building block for the food, pharmaceutical and chemical industry, was produced in this study from lignocellulosic biomass by fermentation, employing Actinobacillus succinogenes 130Z. After separation of lignin from wheat straw by the German SME LXP Group GmbH, …

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Pilot scale succinic acid production from fibre sludge followed by the downstream processing

Agata Olszewska‐Widdrat, Laís Portugal Rios da Costa Pereira, Roland Schneider, Peter D. Unger et autres

The utilization of a cheap side stream is the core for biotechnological production of platform chemicals, such as, succinic acid. This study explores lab and pilot scale fermentation of Actinobacillus succinogenes (b1) and Basfia succiniciproducens (B2) to produce succinic acid from sulphide …

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Enhanced enzymatic digestibility of steam-exploded short rotation hardwood species Betula pendula and its potential for lactic acid production

Ana Susmozas, Linda Schroedter, Paloma Manzanares, Raquel Iglesias et autres

Biomass from the dedicated woody crops is a promising source of lignocellulose-based material for producing bio-based products like lactic acid. This work addresses for the first time a process conversion of the hardwood species Betula pendula biomass into lactic acid through steam …

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Utilization of acid whey and oat pomace in succinic acid fermentation

Corina Kleps, Ralf Malchow, Judith Ettinger, Julia Dalichow et autres

Aim of this study was to investigate the by-products acid whey and oat pomace as nutrient sources for succinic acid production by Actinobacillus succinogenes. Both by-products provide carbon sources in form of glucose and/or lactose without any pre-treatment. Yields of succinic acid …

Utilization of acid whey and oat pomace in succinic acid fermentation

Corina Kleps, Ralf Malchow, Judith Ettinger, Julia Dalichow et autres

AIM: was obtained. The productivities in control medium, acid whey, oat pomace, acid whey/oat pomace (2:1), and acid whey/oat pomace (3:1) were 16 %, 75 %, 48 %, 46 %, and 48 % less, respectively, indicating the necessity of finding the right …

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Transforming waste wood into pure L-(+)-lactic acid: Efficient use of mixed sugar media through cell-recycled continuous fermentation

Linda Schroedter, Roland Schneider, Joachim Venus

• High titers of up to 94.6 g·L −1 lactic acid were achieved via batch fermentation. • H. coagulans A166 tolerated furfuralic compound concentrations of 217 mg·L −1 . • Cell-recycled continuous fermentation increased the productivity by factor 4.5–5.8. • Continuous approach …

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Investigation of the utilization of oat pomace and acid whey in technical scale succinic acid fermentation including downstream processing

Corina Kleps, Roland Schneider, Joachim Venus, Daniel Pleißner

In this study, succinic acid fermentation using acid whey and oat pomace was investigated at 30 L technical scale. Acid whey and oat pomace were mixed in a ratio of 3:1 (v/w) and around 20 g L −1 succinic acid was obtained …