Chemical and enzymatic sequential pretreatment of oat straw for methane production

Gomez-Tovar, Francisco; Celis, Lourdes B.; Razo-Flores, Elı́as; Alatriste‐Mondragón, Felipe

doi:10.1016/j.biortech.2012.03.109

Cited by 52 publications

(44 citation statements)

References 24 publications

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“…In fact, the acid hydrolysis of A. tequilana bagasse by using H 2 SO 4 (1-3% w/w) and high temperatures (100-200°C) has been previously reported (Saucedo-Luna et al, 2010). Nonetheless, a recent study on the use of lignocellulosic hydrolysates for methane production reported the use of HCl instead of H 2 SO 4 , as well as lower temperatures (90°C) for sugar recovery from oat straw (Gomez-Tovar et al, 2012). Therefore, dilute acid hydrolysis was carried out by resuspending the different types of bagasse at 5% (w/v) in a dilute HCl solution.…”

Section: A Tequilana Bagasse and Hydrolysis Proceduresmentioning

confidence: 99%

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Methane production from acid hydrolysates of Agave tequilana bagasse: Evaluation of hydrolysis conditions and methane yield

Arreola-Vargas

Ojeda-Castillo

Snell‐Castro

et al. 2015

Bioresource Technology

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Section: A Tequilana Bagasse and Hydrolysis Proceduresmentioning

confidence: 99%

“…Conversely, anaerobic digestion is an excellent alternative for energy recovery from lignocellulosic hydrolysates, since microbial consortiums involved in this process present interesting consumption rates for both, hexoses and pentoses (Arreola-Vargas et al, 2014;Gomez-Tovar et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Methane production from acid hydrolysates of Agave tequilana bagasse: Evaluation of hydrolysis conditions and methane yield

Arreola-Vargas

Ojeda-Castillo

Snell‐Castro

et al. 2015

Bioresource Technology

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“…Some of the reported studies on AD of tannery wastes refer to industrial districts in Asia (Vasudevan and Ravindran, 2007;Thangamani et al, 2010;Sri Bala Kameswari et al, 2014), Latin America (López et al, 2015;Ruiz-Aguilar et al, 2015;Priebe et al, 2016) and Northern Africa (Zerdani et al, 2004). The majority of this works were oriented toward codigestion of untanned solid wastes with other organic substrates in order to face/prevent possible problems of unbalanced C/N ratio as well as inhibitory conditions from ammonia, long chain fatty acids and sulfide accumulation (Dhayalan et al, 2007;Shanmugam and Horan, 2009;Zupancic and Jemec, 2010;Giaccherini et al, 2016).…”

Section: Modeling Anaerobic Digestion Of Tannery Wastementioning

confidence: 99%

“…Size reduction of TF was achieved by mincing it with a commercial meat miller. Mineral medium (Gomez-Tovar et al, 2012) was added in order to provide optimum conditions for methanogenic activity. Yeast extract was added in the proportion of 100 mg per liter of final volume solution.…”

Section: Experimental Set-upmentioning

confidence: 99%

Modeling the Disintegration Process in Anaerobic Digestion of Tannery Sludge and Fleshing

Polizzi

Alatriste‐Mondragón

Munz

2017

Front. Environ. Sci.

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Mathematical modeling of anaerobic digestion (AD) is widely acknowledged as a powerful tool to v of the process and to support full-scale plant design, operation and optimization. In this work, a modified version of the IWA-ADM1 model is proposed to simulate the AD of tannery primary sludge (TPS) and fleshing, with special emphasis on the disintegration formulation. Multiple batch tests were performed at different inoculum/substrate VS-mass ratio, in order to evaluate the biodegradability of the two substrates and to provide experimental data for modeling purposes. Beside the necessary adjustments of substrates' COD fractionation, the structure modifications of the model focused on the disintegration and hydrolysis. The Contois Monod-based model was adopted to describe disintegration kinetics and the results were compared to the traditionally adopted first-order kinetic. The fate of particulate matter generated from biomass lysis was also questioned and a new model variable was introduced to account for cellular lysis products. Finally, a further modification differentiated substrate particulate matter into a readily and a slowly hydrolysable fraction. Batch tests confirmed that TPS and fleshing are suitable substrates for AD, exhibiting specific methane productions of: 0.26 ± 0.06 and 0.47 ± 0.05 Nm 3 Kg −1 VS, respectively. Modeling results showed that the proposed modifications were crucial for successful simulation of experimental data referring to fleshing, whereas did not have a significant effect on the results related to primary sludge degradation. This work is the first application of an IWA-ADM1-based model to AD of tannery waste.Keywords: anaerobic digestion, tannery waste, modeling, ADM1, hydrolysis INTRODUCTIONLeather industry comprises a chain of processes required to transform raw animal hides into the finished product. A large amount of tannery wastewater and of solid waste is generated throughout the process, especially in the highly water-demanding pre-tanning phases. Dedicated wastewater treatment plants are often conceived to treat tannery pollutant load, characterized by high concentrations of organic matter (including recalcitrant compounds), ammoniacal nitrogen, sulfide and salts (Mannucci et al., 2010). Tannery fleshing (TF) represents the main solid waste; it originates from the removal of animal tissue from the raw hide, usually after liming process (de-haring phase). Tannery primary sludge (TPS) and TF has been traditionally disposed in landfill or incinerated. In the last decades, new stringent regulations and environmental policies Polizzi et al. Modeling Anaerobic Digestion of Tannery Wastehave been encouraging alternative eco-friendly treatments, worldwide. Among them, anaerobic digestion (AD) has been acknowledged as a valuable solution for the treatment of a wide variety of organic waste, whose multiple advantages range from waste volume reduction to renewable energy production and cost-effective management. AD of tannery-originated wastes found its first applications in the late...

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“…The nutritional value of these materials can be enhanced to serve as a medium for microbial growth in the production of bioenergy, such as biogas (Gomez-Tover et al, 2012;He et al, 2008) and bioethanol (Biond et al, 2010;Ko et al 2009;Sun and Cheng 2005). Presence of both lignin and hemicelluloses has shown to be a major barrier in chemical or enzymatic hydrolysis of cellulose (Zhang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Chemical Pre-treatment for Enhancing Bio Accessibility of Oat Husk

Gunawardena

Jin²

2016

AJBB

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Agricultural production delivers enormous waste biomass materials, which have very low values for industries, but contributes significant environmental impact on carbon emission. This study was aimed to identify cost-effective chemical technologies to enhance bio-accessibility of cellulose-based agricultural biomass materials, which can be used as carbohydrates for fermentation process. Three chemical methods alkaline, dilute acid and ammonia soaking were investigated for the pretreatment of oat husk, which was used as a cellulose biomass model. Comparison studies of the pretreatment methods were carried out in a series of bench scale tests and biochemical analysis. These chemical pretreatment methods were evaluated by enzymatically hydrolysing the treated oat husk and estimating the mount of glucose produced in the hydrolysate. Experimental results revealed these pretreatment methods are promising for enhancing the enzymatic accessibility of the cellulose biomass materials. Alkaline pretreatment method appeared to demonstrate the best results in terms of enzymatic hydrolysis and glucose yield.

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Chemical and enzymatic sequential pretreatment of oat straw for methane production

Cited by 52 publications

References 24 publications

Methane production from acid hydrolysates of Agave tequilana bagasse: Evaluation of hydrolysis conditions and methane yield

Methane production from acid hydrolysates of Agave tequilana bagasse: Evaluation of hydrolysis conditions and methane yield

Modeling the Disintegration Process in Anaerobic Digestion of Tannery Sludge and Fleshing

Chemical Pre-treatment for Enhancing Bio Accessibility of Oat Husk

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