Enhanced biohydrogen production from cornstalk wastes with acidification pretreatment by mixed anaerobic cultures

Zhang, Maolin; Fan, Yaoting; Yan, Xiaojun; Pan, Chuang; Zhang, Gaosheng; Lay, Jiunn‐Jyi

doi:10.1016/j.biombioe.2006.08.004

Cited by 298 publications

(100 citation statements)

References 10 publications

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“…12.5 and 13.0 (samples E and F) homogenates saccharifi cation effi ciency was 66.7 and 58.7%, Similar results concerning the infl uence of pre-conditioning of other lignocellulosic substrates under alkaline conditions to an enzymatic delignifi cation of the complex were obtained by other authors [15,[21][22][23][24][25][26][27][28]. The use of the enzymatic hydrolysis had also a positive impact on the performance of hydrogen production in the fermentation process [15,22,28]. For example, Xiao and Liu [23] using the initial acidifi cation (pH 2.0) and alkalization (pH 12.0) of sewage sludge have shown that as a result of these processes, there were liquefaction of organic substrate resulting in increasing the participation of dissolved carbohydrates and increasing the value of the COD in the liquid sludge in relation to the sample not subjected to conditioning at the extremes of pH.…”

Section: Effi Ciency Of Enzymatic Hydrolysis Of Pre-conditioned Homogsupporting

confidence: 85%

Influence of Initial Alkalinity of Lignocellulosic Waste on Their Enzymatic Degradation

Wołczyński¹,

Janosz-Rajczyk²

2014

Archives of Environmental Protection

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Abstract:The presented results of research on the effectiveness of enzymatic hydrolysis of lignocellulosic waste, depending on their initial depolymerisation in alkaline medium were considered in the context of the possibility of their further use in the fermentation media focused on the recovery of energy in the form of molecular hydrogen. The aim of this study was to determine the appropriate dose and concentration of a chemical reagent, whose effi ciency would be high enough to cause decomposition of the complex, but without an excessive production of by-products which could adversely affect the progress and effectiveness of the enzymatic hydrolysis and fermentation. The effect of treatment on physical-chemical changes of homogenates' properties such as pH, COD, the concentration of monosaccharide and total sugars and the concentration of total suspended solids and volatile suspended solids was determined. The enzymatic decomposition of lignocellulosic complex was repeatedly more effi cient if the sample homogenates were subjected to an initial exposure to NaOH. The degree of conversion of complex sugars into simple sugars during enzymatic hydrolysis of homogenates pre-alkalized to pH 11.5 and 12.0 was 83.3 and 84.2% respectively, which should be suffi cient for effi cient hydrogen fermentation process.

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Section: Effi Ciency Of Enzymatic Hydrolysis Of Pre-conditioned Homogsupporting

confidence: 85%

Influence of Initial Alkalinity of Lignocellulosic Waste on Their Enzymatic Degradation

Wołczyński¹,

Janosz-Rajczyk²

2014

Archives of Environmental Protection

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“…These results suggest that pretreated SSS is playing the vital role in the biogas production. In view of the variation in biogas and methane yield with different substrates and its production by fermentation is associated with availability of carbon source (Mangnusson et al, 2008, Zhang et al, 2007, Fan et al, 2003. It was noticed that more soluble sugars released to fermentation medium by the SSS was observed compared to GNS and PS denoting the higher biogas yield.…”

Section: Resultsmentioning

confidence: 99%

Biogas production from renewable lignocellulosic biomass

Gnanambal

Swaminathan

2015

Int. J. Environ.

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Effect of raw and biologically treated lignocellulosic biomass using cow dung slurry for biogas production is reported. Biomass is an energy source. Water containing biomass such as sewage sludge, cow dung slurry and lignocellulosic waste, has several important advantages and one of the key feature is renewability. Cow dung slurry has the potential to produce large amounts of biogas. Four categories of bacteria viz., hydrolytic, fermentative, fermentative acidogenic and acidogenic-methanogenic bacteria are involved in the production of biogas. The different characteristics of the cow dung slurry were determined according to standard methods. Hemicellulose, cellulose and lignin content of the lignocellulosic waste were also determined in our earlier studies. The substrates were digested under anaerobic condition for 5 days. The total biogas and methane produced during anaerobic digestion were estimated on 5 th day. The total biogas produced during digestion was estimated by water displacement method. Biological methane production was estimated by using Saccharometer.

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“…and Micrococcus sp. Accordingly, conversion of cornstalks into hydrogen was accompanied by production of acetate, propionate, butyrate and ethanol [64]. In another study, hydrogen (319 ml H 2 .…”

Section: Preparation and Properties Of Mixed Microbial Consortiamentioning

confidence: 95%

Microbiological and engineering aspects of biohydrogen production

et al. 2009

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Dramatically rising oil prices and increasing awareness of the dire environmental consequences of fossil fuel use, including startling effects of climate change, are refocusing attention worldwide on the search for alternative fuels. Hydrogen is poised to become an important future energy carrier. Renewable hydrogen production is pivotal in making it a truly sustainable replacement for fossil fuels, and for realizing its full potential in reducing greenhouse gas emissions. One attractive option is to produce hydrogen through microbial fermentation. This process would use readily available wastes as well as presently unutilized bioresources, including enormous supplies of agricultural and forestry wastes. These potential energy sources are currently not well exploited, and in addition, pose environmental problems. However, fuels are relatively low value products, placing severe constraints on any production process. Therefore, means must be sought to maximize yields and rates of hydrogen production while at the same time minimizing energy and capital inputs to the bioprocess. Here we review the various attributes of the characterized hydrogen producing bacteria as well as the preparation and properties of mixed microfl ora that have been shown to convert various substrates to hydrogen. Factors affecting yields and rates are highlighted and some avenues for increasing these parameters are explored. On the engineering side, we review the potential waste pre-treatment technologies and discuss the relevant bioprocess parameters, possible reactor confi gurations, including emerging technologies, and how engineering design-directed research might provide insight into the exploitation of the signifi cant energy potential of biomass resources.

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Enhanced biohydrogen production from cornstalk wastes with acidification pretreatment by mixed anaerobic cultures

Cited by 298 publications

References 10 publications

Influence of Initial Alkalinity of Lignocellulosic Waste on Their Enzymatic Degradation

Influence of Initial Alkalinity of Lignocellulosic Waste on Their Enzymatic Degradation

Biogas production from renewable lignocellulosic biomass

Microbiological and engineering aspects of biohydrogen production

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