Bioethanol Production from Steam Explosion Pretreated Straw

Kahr, Heike; Jäger, Alexander; Lanzerstorfer, Christof

doi:10.5772/21008

Cited by 7 publications

(4 citation statements)

References 57 publications

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“…All the parameters used for energy balance analysis are summarized in the Supporting Information (Table S2). The energy consumption and production were estimated according to the following equations where E in,HTT (MJ) is the heat consumption for HTT, m r (t) the disposal capacity of rice straw, m w (t) the water usage, γ w (kJ/kg °C) the specific heat capacity of water (4.18 kJ/kg °C), γ r (kJ/kg °C) the specific heat capacity of rice straw (1.67 kJ/kg °C), T p (°C) the hydrothermal pretreatment temperature (150 or 210 °C), T a the ambient temperature (25 °C in this study), T d (°C) the temperature for AD (35 °C in this study), and ϕ (%) the heat recovery efficiency (assumed at 85%). Because a short holding time (0–30 min) was applied and the out wall of the HTT reactor would be equipped with thermal insulation material when being utilized in practice, heat loss through the reactor wall during the HTT process was not accounted for in this work. where E in, AD (MJ) is the heat consumption for AD, m (t) the digestate weight, γ (kJ/kg °C) the specific heat capacity of digestate and estimated to be the same as water (4.18 kJ/kg °C) in this study, T d (°C) the AD temperature (35 °C), and T a (°C) the ambient temperature (25 °C in this study).…”

Section: Methodsmentioning

confidence: 99%

Energy Recovery from Rice Straw through Hydrothermal Pretreatment and Subsequent Biomethane Production

Huang

Zhang

et al. 2017

Energy Fuels

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Rice straw is an abundant agricultural waste in Asia. Anaerobic digestion (AD) as an environmentally friendly process for bioenergy recovery is expected to solve the environmental issues brought about by open burning of rice straw. In order to test the feasibility and scalability of hydrothermal treatment (HTT) on rice straw for subsequent methane production from pretreated straw, this study attempted two peak HTT temperatures (150 and 210 °C, i.e. HTT150 and HTT210, respectively) for holding 0–30 min to pretreat rice straw which was then used for mesophilic methane fermentation. Thereafter energy balance and energy recovery were analyzed on HTT and subsequent AD of rice straw. Results show that HTT150 exhibited a positive effect on subsequent methane production, achieving the highest methane yield of 134 mL (STP) for per gram of added volatile solid (VSadded) of rice straw after being hydrothermally pretreated at 150 °C for 20 min. The maximum specific methane production rate (μ), around 17–40% higher than the control (without pretreatment), was achieved from HTT150 pretreated rice straw. HTT210 was found to have a negative effect on subsequent AD. Considering disposal of rice straw by HTT coupling with subsequent methane production, the highest net energy gain (ΔE = E out – E in), energy ratio (E out/E in), and energy recovery (in comparison to direct combustion) were obtained at HTT150 for 20 min, about 2741 MJ/t, 2.7, and 30.7%, respectively. Results from this work imply that HTT temperature is critically important when subsequent AD for enhanced methane production and energy balance of the whole disposal system are targeted.

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Section: Methodsmentioning

confidence: 99%

Energy Recovery from Rice Straw through Hydrothermal Pretreatment and Subsequent Biomethane Production

Huang

Zhang

et al. 2017

Energy Fuels

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“…During the laboratory tests for the thermal characterisation of AGROTESs samples, it was not possible to deduce their specific heat capacity, so the relative data for each raw material used for samples production, were retrieved from literature (Verma & Prasad 2000;Kahr et al 2012;Liuzzi et al 2020) and web databases (Greenspec.co.uk; Engineeringtoolbox). The tentative specific heat capacity of each AGROTESs samples was obtained from the weighted average of the specific heat capacities of each of the raw materials used in the panels and are reported in Table 4.…”

Section: Applications Of Agrotess Panels In Buildingsmentioning

confidence: 99%

“…Tentatively calculated heat capacity of AGROTESs samplesReferences: data retrieved fromVerma & Prasad 2000;Kahr et al 2012;Liuzzi et al 2020 …”

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confidence: 99%

Natural Fibre Insulation Materials: Use of Textile and Agri-food Waste in a Circular Economy Perspective

Savio

Pennacchio

Patrucco³

et al. 2022

Mater Circ Econ

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Fibrous materials are among those most used for the thermal and acoustic insulation of building envelopes and are also suitable for a wide range of applications. In building construction, the demand for products with low environmental impact — in line with the Green Deal challenge of the European Community — is growing, but the building market is still mostly oriented towards traditional products, missing the many opportunities for using waste materials from existing industrial production. The paper presents the experimental results of new thermal and acoustic insulation products for building construction and interior design, based on previous experiences of the research group. They are produced entirely using waste sheep’s wool as a “matrix” and other waste fibres as “fillers”. The materials proposed originate from textile and agri-industrial chains in the Piedmont region and have no uses other than waste-to-heat biomass. The panels have characteristics of rigidity, workability, and thermal conductivity that make them suitable for building envelope insulation.

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“…Debido al alto consumo de energía durante esta etapa, se están buscando alternativas más sostenibles a la deshidratación convecional (Kreis y Gorak, 2006;del Pozo-Gómez et al, 2007;Bakhsni et al, 2008). No obstante, en la actualidad la destilación azeotrópica sigue siendo la más empleada a nivel industrial (Kahr et al, 2012).…”

Section: Fermentación De La Biomasa Lignocelulósicaunclassified

Desarrollos Tecnológicos Para La Mejora Y Control Del Proceso De Obtención De Bioetanol a Partir De Residuos Agroalimentarios

Domínguez¹

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As stated by the United Nations Department of Economic and Social Affairs, the first half of the present century will experience a significant increase in global energy demand due to the expected growth of world population and global economic development. On the other hand, recent reports from the Intergovernmental Panel on Climate Change definitely evidence the link between the continued use of fossil fuels and the increasing concentration of greenhouse gases into the atmosphere being responsible for climate change. In this context, a global commitment is needed in the search for cleaner, environmentally friendly and sustainable energy sources, such as second-generation bioethanol from agro-industrial waste. como miembro del comité organizador de un congreso. En el ámbito de la docencia, ha ejercido como directora experimental en la elaboración de siete Trabajos Final de Carrera o Grado (T.F.C. / T.F.G.) y en un Trabajo Final de Máster (TFM), ha colaborado en la docencia de asignaturas y posee dos actas de congresos nacionales y tres internacionales publicadas en editorial. ÍNDICES ÍNDICE DE CONTENIDOS1. INTRODUCCIÓN 1.1. JUSTIFICACIÓN DEL ESTUDIO 1.2. EL BIOETANOL DE SEGUNDA GENERACIÓN: UNA ALTERNATIVA A LOS COMBUSTIBLES FÓSILES 1.2.1. Definición y características generales del bioetanol de segunda generación 1.2.2. Mercado y perspectivas del bioetanol 1.3. PROCESO DE OBTENCIÓN DE BIOETANOL 2G

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Bioethanol Production from Steam Explosion Pretreated Straw

Cited by 7 publications

References 57 publications

Energy Recovery from Rice Straw through Hydrothermal Pretreatment and Subsequent Biomethane Production

Energy Recovery from Rice Straw through Hydrothermal Pretreatment and Subsequent Biomethane Production

Natural Fibre Insulation Materials: Use of Textile and Agri-food Waste in a Circular Economy Perspective

Desarrollos Tecnológicos Para La Mejora Y Control Del Proceso De Obtención De Bioetanol a Partir De Residuos Agroalimentarios

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