Optimisation of a microwave pretreatment of wheat straw for methane production

Jackowiak, D.; Bassard, D.; Pauss, André; Ribeiro, Thierry

doi:10.1016/j.biortech.2011.03.107

Cited by 132 publications

(50 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…After extraction, the solution was discarded and the particles were dried at room temperature and stored at -18 o C until use. Microwave pretreatment: 250 g bark portions were treated with 700 Watt microwave energy in a household microwave oven for 2 x 2 min (Jackowiak et al 2011, Makk et al 2013. Treated bark was collected and stored at -18 o C until use.…”

Section: Pretreatment Methodsmentioning

confidence: 99%

Utilization of Oak (Quercus petreae (Matt.) Liebl.) Bark for Anaerobic Digested Biogas Production

Makk¹,

Rétfalvi²,

Hofmann³

2017

Acta Silvatica Et Lignaria Hungarica

View full text Add to dashboard Cite

-Fossil fuel depletion has led to an increasing number of research studies and applications focusing on renewable energy, such as different types of biomass. Lignocellulosic biomass represents an abundant source of biomass suitable for energy production in various forms. The present research investigates the application possibility of pedunculate oak bark (Quercus petrea (Matt.) Liebl.) for the production of biogas via anaerobic digestion. This research has significant novelty, as only a few examples on the utilization of tree bark wastes for the production of biogas can be found in the scientific literature. One of the key factors of increasing biogas yield is the efficient hydrolysis of the basic material, which is achieved by different pretreatment methods. In this study, oak bark was pretreated by microwave energy, by extraction, and by the combination of these two methods. The semi-continuous thermophylic anaerobic digestion of untreated oak bark resulted a 76.3 ml/g volatile solid specific methane yield over a 50-day period, which was not significantly lower than methane yield gained from pretreated basic material. Results indicated that oak bark is suitable for the production of biogas even without the application of the investigated pretreatment techniques. As extraction of oak bark does not impair biogas production, the complex biorefinery utilization of oak bark in the form of extraction bark polyphenols and the subsequent anaerobic fermentation of lignocellulosic residue can be accomplished in the future. lignocelluloses / biorefinery / forestry by-products / renewable energiesKivonat -A kocsánytalan tölgy (Quercus petreae (Matt.) Liebl.) kéreg alkalmazhatósága anaerob úton előállítható biogáz termelés céljára. A fosszilis energiahordozók kimerülése miatt számos alkalmazási terület és kutatás összpontosít a megújuló energiaforrásokra. A lignocellulózok, mint biomassza alapú energiahordozók kutatása releváns téma, mivel nagy mennyiségben állnak rendelkezésre. Ezen kutatás a kocsánytalan tölgy (Quercus petreae (Matt.) Liebl.) kéreg alkalmazási lehetőségeit vizsgálja az anaerob úton előállítható biogáz termelés céljára. A kéreg hulladék effajta felhasználásával foglalkozó szakirodalmak száma szegényes. A lignocellulózok esetében kulcs fontosságú eljárás az alapanyag hidrolízise a biogázhozam, ezzel együtt a metánhozam növelése érdekében. A tölgy kéreg alapanyag előkezelése mikrohullámmal, extrakcióval és együttes alkalmazásukkal történt. A kezeletlen tölgy kéreg 50 napos, félfolyamatos, termofil anaerob fermentáció során 76.3 ml/g szerves szárazanyag fajlagos metánhozam érhető el, ami szignifikánsan nem alacsonyabb a kezelthez képest. Az eredmények alapján a tölgy kéreg, alkalmas metán előállításra előkezelési eljárások nélkül is. Mivel a kéreg extrakciója nem rontja a biogáz termelés hatékonyságát, ezért a kéreg melléktermék komplex kémiai hasznosítása, az extrakt anyagok kivonása valamint a visszamaradt lignocellulóz vázanyag anaerob fermentációja által a jövőben lehetséges. lignocellulózok / ...

show abstract

Section: Pretreatment Methodsmentioning

confidence: 99%

Utilization of Oak (Quercus petreae (Matt.) Liebl.) Bark for Anaerobic Digested Biogas Production

Makk¹,

Rétfalvi²,

Hofmann³

2017

Acta Silvatica Et Lignaria Hungarica

View full text Add to dashboard Cite

show abstract

“…Cellulose have protected and sheathed by lignin and hemicellulose, and also lignin have covalently bonded to carbohydrates [41]. Cellulose, hemicellulose and lignin content of wheat straw have including [33][34][35][36][37][38][39][40][20][21][22][23][24][25], and 15-20 (%w/w), respectively [60]. Due to this structural complexity of the lignocellulosic matrix, ethanol production from wheat straw requires pretreatment, which is very important for its degradation.…”

Section: Wheat Straw Production and Potential Feedstock For 2nd Genermentioning

confidence: 99%

“…The microwave pretreatment consisted of three stages: (i) the ramp time to reach the targeted temperature, (ii) holding time at targeted temperature and (iii) the time to cool down until 90C o in order to allow being safe open the vessels. The improvement of anaerobic digestibility of the wheat grass by microwave pretreatment is related mainly to structure modifications of the matrix of wheat straw [20]. The microwave-assisted process was a very effective method for the xylose production from wheat straw by diluted acid catalysis [88] the use of microwaves as an energy source provides an up to 85-fold savings in energy [18].…”

Section: Microwave Pretreatmentmentioning

confidence: 99%

Pretreatments to Enhance the Digestibility of Wheat Straw

Zahoor

2014

IJRSE

View full text Add to dashboard Cite

Abstract:Wheat straw is a sufficient agricultural by-product with a low market price. The biofuel produced from lignocellulosic material exhibits energetic, economic and environmental benefits in contrast to bio-ethanol from starch or sugar. Until now, physical and chemical difficulty caused by the close connection of the main components of lignocellulosic biomass, discourage the hydrolysis of cellulose and hemicellulose to fermentable sugars. The main purpose of pretreatment is to enhance the enzyme accessibility improving digestibility of cellulose. Every pretreatment has a particular effect on the fraction of cellulose, hemicellulose and lignin, thus different pretreatment methods and conditions should be selected for the development of subsequent hydrolysis and fermentation steps. This paper reviews the most importance technologies for ethanol production from lignocellulose and its represent several vital qualities that should be marked for low-price and promote pretreatment processes.

show abstract

“…The AD of particulate materials and complex compounds is carried out by anaerobic microorganisms (Rincón et al, 2013b) and it occurs in four major steps: hydrolysis, acidogenesis, acetogenesis and methanogenesis. Hydrolysis is generally the rate-limiting step when bacteria release extracellular enzymes that break down and further solubilize organic particulate matter to be used as substrate in subsequent reactions (Jackowiak et al, 2011). Therefore, to improve digestion efficiency, the most productive approach is to disrupt the chemical bonds in the material to be subjected to hydrolysis.…”

Section: Introductionmentioning

confidence: 99%

Impact of microwave pre-treatment on the batch anaerobic digestion of two-phase olive mill solid residue: a kinetic approach

Rincón

Canales

Martı́n³

et al. 2016

Grasas y Aceites

View full text Add to dashboard Cite

SUMMARY:The effect of a microwave (MW) pre-treatment on two-phase olive mill solid residue (OMSR) or alperujo with a view to enhancing its anaerobic digestibility was studied. The MW pre-treatment was carried out at a power of 800 W and at a targeted temperature of 50 °C using different heating rates and holding times. The following specific energies were applied: 4377 kJ·kg TS −1 (MW1), 4830 kJ·kg TS −1 (MW2), 7170 kJ·kg TS −1 (MW3) and 7660 kJ·kg TS −1 (MW4). The maximum methane yield, 395±1 mL CH 4 ·g VS added −1 , was obtained for MW4. The effect of the pre-treatment on the kinetics of the process was also studied. The methane production curves generated during the batch tests showed a first exponential stage and a second sigmoidal stage for all the cases studied. In the first stage, the kinetic constant for the pre-treatment MW1 was 54.8% higher than that obtained for untreated OMSR.KEYWORDS: Alperujo; Anaerobic digestion; Batch; Kinetics; Microwave RESUMEN: Impacto del pretratamiento con microondas sobre la digestión anaerobia en régimen discontinuo de residuos sólidos de almazaras de dos fases: un enfoque cinético. El efecto del pretratamiento con microondas (MW) sobre el residuo semisólido procedente de la elaboración del aceite de oliva por el sistema de dos fases o alperujo fue estudiado con el objeto de aumentar su digestibilidad anaerobia. El pretratamiento fue llevado a cabo a una potencia de 800W y a una temperatura de 50 °C empleándose distintas velocidades de calentamiento así como diferentes tiempos de espera para obtener dichas condiciones. Las siguientes energías específicas fueron aplicadas: 4377 kJ·kg TS −1 (MW1), 4830 kJ·kg TS −1 (MW2), 7170 kJ·kg TS −1 (MW3) y 7660 kJ·kg TS −1 (MW4). El máximo rendimiento 395±1 mL CH 4 ·g SV añadidos −1 se obtuvo para MW4. El efecto del pretratamiento en la cinética del proceso también fue estudiado. Las curvas de producción de metano durante los ensayos mostraron una etapa exponencial y una sigmoidal en todos los casos. En la primera etapa, la constante cinética para MW1 fue 54.8% mayor que la obtenida para el alperujo sin pretratar.

show abstract

Optimisation of a microwave pretreatment of wheat straw for methane production

Cited by 132 publications

References 32 publications

Utilization of Oak (Quercus petreae (Matt.) Liebl.) Bark for Anaerobic Digested Biogas Production

Utilization of Oak (Quercus petreae (Matt.) Liebl.) Bark for Anaerobic Digested Biogas Production

Pretreatments to Enhance the Digestibility of Wheat Straw

Impact of microwave pre-treatment on the batch anaerobic digestion of two-phase olive mill solid residue: a kinetic approach

Contact Info

Product

Resources

About