A comparative evaluation of single-stage and two-stage anaerobic digestion processes for biomethane and biohydrogen production using thin stillage was performed to assess the impact of separating the acidogenic and methanogenic stages on anaerobic digestion. Thin stillage, the main by-product from ethanol production, was characterized by high total chemical oxygen demand (TCOD) of 122 g/L and t...

The aim of this study was to investigate the effect of trace element supplementation on operation of wheat stillage-fed biogas tank reactors. The stillage used was a residue from bio-ethanol production, containing high levels of sulfate. In biogas production, high sulfate content has been associated with poor process stability in terms of low methane production and accumulation of process inter...

Ethanol production implies in by-products generation, mainly vinasse and stillage, respectively generated from sugarcane corn ethanol flex plants. Both require efficient treatment routes to avoid environmental side-effects support energy recovery. Accordingly, the aim of this study was evaluate techno-economic potential bioenergy (electric thermal energy) anaerobic digestion (AD) stillage. Thre...

With the increasing demand for renewable energy and sustainable waste treatment, biogas production is expanding. Approximately four billion litres of bio-ethanol are produced annually for vehicle fuel in Europe, resulting in the production of large amounts of stillage residues. This stillage is energy-rich and can be used for biogas production, but is a challenging substrate due to its high lev...

Anaerobic digestion of whole stillage from a dry-grind corn-based ethanol plant was evaluated by batch and continuous-flow digesters under thermophilic and mesophilic conditions. At whole corn stillage concentrations of 6348 to 50,786 mg total chemical oxygen demand (TCOD)/L, at standard temperature (0 °C) and pressure (1 atm), preliminary biochemical methane potential assays produced 88±8 L (4...

A starch-based ethanol facility producing 200,000 m 3 ethanol/year also produces ca. 2 million m 3 thin stillage, which can be used to improve the entire process. In this work, five food-grade filamentous fungi, including a Zygomycete and four Ascomycetes were successfully grown in thin stillage containing 9% solids. Cultivation with Neurospora intermedia led to the production of ca. 16 g·L −1 ...

The 2nd generation plants producing ethanol from lignocelluloses demand risky and high investment costs. This paper presents the energyand economical evaluations for integrating lignocellulose in current 1st generation dry mill ethanol processes, using filamentous fungi. Dry mills use grains and have mills, liquefactions, saccharifications, fermentation, and distillation to produce ethanol, whi...

Cereal Chem. 83(2):121–126 In dry-grind processing to produce ethanol from corn, unfermented solids are removed from ethanol by distillation and dried to produce distillers dried grains with solubles (DDGS), an animal food. Fouling of thin stillage evaporators has been identified as an important energy consumption issue in dry-grind facilities. Using an annular fouling apparatus, four batches o...

Background and Objectives Cereal-based bioethanol stillage, the main by-product of industrial production, is a potential substrate for fructans. However, quantification fructans in such complex sample matrices still challenge corresponding analytics to be overcome allow identification utilization unused fructan sources. Especially possible or rather process development requires appropriate firs...