Pyrolysis of ethanol coproducts

Wood, Christine; Rosentrater, Kurt A.; Muthukumarappan, K.

doi:10.1016/j.indcrop.2014.02.039

Cited by 10 publications

(3 citation statements)

References 32 publications

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“…[1] Although pure amino acids are produced mainly by microbial fermentation or biocatalytic synthesis, [2] protein-rich side products from the agro-industry or biorefinery provide, after hydrolysis, cheap alternative sources. [3] Examples are wheat gluten from starch isolation, [4] dried distiller's grains with solubles (DDGS) from bio-ethanol production, [5] sugarbeet vinasse, poultry feather meal, [6] and press cake from jatropha and castor oil production, [7] in which the average protein content accounts for at least 20-40 wt % of the dry mass. The isolated proteins are often of too low quality for food/feed applications and, therefore, they are attractive as a feedstock to produce biobased N-containing chemicals, such as amine or nitrile intermediates.…”

Section: Introductionmentioning

confidence: 99%

Bio‐Based Nitriles from the Heterogeneously Catalyzed Oxidative Decarboxylation of Amino Acids

et al. 2014

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The oxidative decarboxylation of amino acids to nitriles was achieved in aqueous solution by in situ halide oxidation using catalytic amounts of tungstate exchanged on a [Ni,Al] layered double hydroxide (LDH), NH4 Br, and H2 O2 as the terminal oxidant. Both halide oxidation and oxidative decarboxylation were facilitated by proximity effects between the reactants and the LDH catalyst. A wide range of amino acids was converted with high yields, often >90 %. The nitrile selectivity was excellent, and the system is compatible with amide, alcohol, and in particular carboxylic acid, amine, and guanidine functional groups after appropriate neutralization. This heterogeneous catalytic system was applied successfully to convert a protein-rich byproduct from the starch industry into useful bio-based N-containing chemicals.

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Section: Introductionmentioning

confidence: 99%

Bio‐Based Nitriles from the Heterogeneously Catalyzed Oxidative Decarboxylation of Amino Acids

et al. 2014

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“…Distillers’ grains, the primary by-product of liquor/ethanol production, were produced about 20 million and 100 million tonnes in China in 2009 (Yang et al, 2012) and 2014 (Zuo et al, 2016), respectively, and this amount is still increasing by 20% annually. Over 80% of distillers’ grains was consumed by the beef, dairy, swine and poultry industries (Wood et al, 2014) for its 25–35% protein, 7.2% fibre and 3–13% fat content (Bhadra et al, 2009). Distillers’ grains could also be used as fertilizer source for plant growth (Nelson et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Biochar of distillers’ grains anaerobic digestion residue: Influence of pyrolysis conditions on its characteristics and ammonium adsorptive optimization

et al. 2019

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To promote the sustainable development of the liquor/ethanol industry and environment protection, alternative ways to dispose of anaerobic digestion residue (ADR) are urgently required. This research aims at studying the effects of different residence times (RTs) (30, 60 and 120 min) and heating rates (HR) (2.5, 5.0 and 10.0°C min-1) under 700°C on characteristics of ADR biochar as well as the optimization of ammonium (NH4+) adsorption. Results showed that, with the increasing RT and HR, the aromaticity as well as the content of fixed carbon and elemental carbon of ADR biochar increased, but the pyrolysis yield, volatile matter content, elemental hydrogen, oxygen and polarity decreased. Biochar prepared at 60 min and 5.0°C min-1 under 700°C presented the best development of orderly and honeycomb shape structures, highest specific surface area and maximal amount of NH4+ adsorption (3.15 mg N g-1). The multilayer heterogeneous adsorption process dominated the NH4+ adsorption behaviour. And the maximal amount of NH4+ adsorption was achieved with 4 g biochar L-1 at pH 11.0 along with the order of the competitive effect of K+ > Na+ > Ca2+ > Mg2+. Furthermore, NH4+ adsorption was exothermic. Thus, the present study demonstrated that ADR biochar has potential to adsorb NH4+ from NH4+ polluted water to meet environmental standards.

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“…Industrial distillery stillage, wastewater from bioethanol production, is a cheap and abundant substrate that has been successfully used as alternative feedstock for LA and probiotic biomass production (Mladenović et al, 2016). Traditionally, the stillage was employed in animal nutrition after drying as dried distillers grains with solubles (DDGS) (Wood et al, 2014), but alternative possibilities such as production of biogas (Kaparaju et al, 2010), hydrogen (Luo et al, 2010 and edible fungal biomass (Pietrzak et al, 2016) were also proposed. The main objective of this study was to assess utilization of potato stillage in a two-stage fermentation process using Bacillus licheniformis TFUNS and Lactobacillus paracasei NRRL B-4564.…”

Section: Introductionmentioning

confidence: 99%

Two-stage fermentation for lactic acid production on distillery stillage

Mladenović¹,

Djukić‐Vuković²,

Radosavljević³

et al. 2018

J Proc Ener Agri

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The aim of this study was to assess utilization of distillery stillage in a two-stage fermentation using Bacillus licheniformis TFUNS and Lactobacillus paracasei NRRL B-4564. In the first stage the stillage was pretreated with B. licheniformis which is an efficient producer of proteolytic enzymes, in order to increase the content of free α-amino nitrogen in the waste substrate. In the subsequent stage the lactic acid (LA) fermentation by L. paracasei was performed. The results of the fermentation of proteolytically pretreated stillage (i.e. of two-stage fermentation) were compared with the untreated stillage (one-stage fermentation). The results have shown that the amount of free α-amino nitrogen in pretreated media was 107 % higher compared to the initial value. The concentration of the LA obtained in the second stage by L. paracasei was 48 % higher than in untreated stillage. In addition, the growth of L. paracasei in pretreated stillage was also better supported compared to that in untreated media. The process enabled economical and sufficient supply of easily assimilative nitrogen sources needed for lactic acid bacteria, thus avoiding addition of costly sources in the media commonly performed in LA production.

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Pyrolysis of ethanol coproducts

Cited by 10 publications

References 32 publications

Bio‐Based Nitriles from the Heterogeneously Catalyzed Oxidative Decarboxylation of Amino Acids

Bio‐Based Nitriles from the Heterogeneously Catalyzed Oxidative Decarboxylation of Amino Acids

Biochar of distillers’ grains anaerobic digestion residue: Influence of pyrolysis conditions on its characteristics and ammonium adsorptive optimization

Two-stage fermentation for lactic acid production on distillery stillage

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