Sweet sorghum as a bioenergy crop: Literature review

Regassa, Teshome; Wortmann, Charles S.

doi:10.1016/j.biombioe.2014.03.052

Cited by 176 publications

(102 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A recent review gives comprehensive conception about sweet sorghum as an energy crop and summarizes processing methods aiming a wide variety of product both from juice and bagasse [53]. Another study was specialized on biofuel production [54], and another one gives a summary of sweet sorghum as an energy crop [55]. Syrup production for nutritional purposes however, fell outside the scope of interest.…”

Section: Introductionmentioning

confidence: 99%

Chemical-free Processing of Sweet Sorghum Juice of Cultivar Sucrosorgho 506

Cséfalvay

Bakacsi

2018

Period. Polytech. Chem. Eng.

View full text Add to dashboard Cite

The development of sweet sorghum syrup producing technology for the juice of cultivar Sucrosorgho 506 was completed. The applicability of different existing syrup production technologies including sugar beet-based sugar production technology, and sugar cane processing technology was also tested. The new chemical-free syrup production technology was realized at laboratory-scale and large laboratory-scale. The proposed technology offers a chemical free separation and concentration of carbohydrates, and consists of centrifugal separation; ultrafiltration extended with an approved sterilization followed by nanofiltration to separate carbohydrates and inorganics, and finally a vacuum evaporation to reach syrup state. By using this technology the initial glucose:fructose:sucrose ratio could be preserved in the syrup, therefore not limiting its further use. The possible food application was established by sensory analysis. It was revealed that the syrup produced via the developed process obtained the most attractive character that enables the opportunity to use as natural sweetener.

show abstract

Section: Introductionmentioning

confidence: 99%

Chemical-free Processing of Sweet Sorghum Juice of Cultivar Sucrosorgho 506

Cséfalvay

Bakacsi

2018

Period. Polytech. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…, which makes this crop attractive for second-generation (lignocellulosic) biofuel production (Rooney et al, 2007;Almodares and Hadi, 2009;Regassa and Wortmann, 2014). Sorghum provides a number of advantages over other bioenergy crops, especially maize (Zea mays) and sugarcane (Saccharum spp.).…”

mentioning

confidence: 99%

The Structure and Catalytic Mechanism of Sorghum bicolor Caffeoyl-CoA O-Methyltransferase

Walker

Sattler

Regner³

et al. 2016

Plant Physiol.

View full text Add to dashboard Cite

ORCID IDs: 0000-0001-7799-2704 (M.R.); 0000-0002-6093-4521 (J.R.); 0000-0002-6814-4073 (S.E.S.); 0000-0002-0693-7860 (C.K.).Caffeoyl-coenzyme A 3-O-methyltransferase (CCoAOMT) is an S-adenosyl methionine (SAM)-dependent O-methyltransferase responsible for methylation of the meta-hydroxyl group of caffeoyl-coenzyme A (CoA) on the pathway to monolignols, with their ring methoxylation status characteristic of guaiacyl or syringyl units in lignin. In order to better understand the unique class of type 2 O-methyltransferases from monocots, we have characterized CCoAOMT from sorghum (Sorghum bicolor; SbCCoAOMT), including the SAM binary complex crystal structure and steady-state enzyme kinetics. Key amino acid residues were validated with sitedirected mutagenesis. Isothermal titration calorimetry data indicated a sequential binding mechanism for SbCCoAOMT, wherein SAM binds prior to caffeoyl-CoA, and the enzyme showed allosteric behavior with respect to it. 5-Hydroxyferuloyl-CoA was not a substrate for SbCCoAOMT. We propose a catalytic mechanism in which lysine-180 acts as a catalytic base and deprotonates the reactive hydroxyl group of caffeoyl-CoA. This deprotonation is facilitated by the coordination of the reactive hydroxyl group by Ca 2+ in the active site, lowering the pK a of the 39-OH group. Collectively, these data give a new perspective on the catalytic mechanism of CCoAOMTs and provide a basis for the functional diversity exhibited by type 2 plant OMTs that contain a unique insertion loop (residues 208-231) conferring affinity for phenylpropanoid-CoA thioesters. The structural model of SbCCoAOMT can serve as the basis for protein engineering approaches to enhance the nutritional, agronomic, and industrially relevant properties of sorghum.

show abstract

“…In the present study, the process that was considered was based on Advanced Solid-State Fermentation (ASSF) technology, which could overcome the aforementioned disadvantages [69,70]. As a result, the theoretical bioethanol potential was around 5228.7-6322.4 L/ha for the three selected agricultural regions if the ASSF technology were used there, which was higher than values obtained in previous studies [14,15,21,81]. Nevertheless, Figure 6 indicates that bioethanol production using sweet sorghum is still not economically feasible using processes currently used in the selected regions, due to high cost input of the bioethanol conversion and biomass logistics and the price commanded by the ethanol product.…”

Section: Discussionmentioning

confidence: 62%

Technical Feasibility and Comprehensive Sustainability Assessment of Sweet Sorghum for Bioethanol Production in China

Yang

Liu

et al. 2018

Sustainability

View full text Add to dashboard Cite

Under dual pressures of energy and environmental security, sweet sorghum is becoming one of the most promising feedstocks for biofuel production. In the present study, the technical feasibility of sweet sorghum production was assessed in eight agricultural regions in China using the Sweet Sorghum Production Technique Maturity Model. Three top typical agricultural zones were then selected for further sustainability assessment of sweet sorghum production: Northeast China (NEC), Huang-Huai-Hai Basin (HHHB) and Ganxin Region (GX). Assessment results demonstrated that NEC exhibited the best sustainable production of sweet sorghum, with a degree of technical maturity value of 0.8066, followed by HHHB and GX, with corresponding values of 0.7531 and 0.6594, respectively. Prospective economic profitability analysis indicated that bioethanol production from sweet sorghum was not feasible using current technologies in China. More efforts are needed to dramatically improve feedstock mechanization logistics while developing new bioethanol productive technology to reduce the total cost. This study provides insight and information to guide further technological development toward profitable industrialization and large-scale sweet sorghum bioethanol production.

show abstract

Sweet sorghum as a bioenergy crop: Literature review

Cited by 176 publications

References 33 publications

Chemical-free Processing of Sweet Sorghum Juice of Cultivar Sucrosorgho 506

Chemical-free Processing of Sweet Sorghum Juice of Cultivar Sucrosorgho 506

The Structure and Catalytic Mechanism of Sorghum bicolor Caffeoyl-CoA O-Methyltransferase

Technical Feasibility and Comprehensive Sustainability Assessment of Sweet Sorghum for Bioethanol Production in China

Contact Info

Product

Resources

About