Effect of temperature on carbohydrate hydrolase activity during dry anaerobic fermentation of mixed wheat straw

2013 ◽  
Vol 21 (10) ◽  
pp. 1271-1276
Author(s):  
Jun-Ling NIU ◽  
Li-Zhen LIANG ◽  
Lei LIU ◽  
Quan-Guo ZHANG
Keyword(s):  
Wheat Straw ◽  
Anaerobic Fermentation ◽  
Hydrolase Activity ◽  
Effect Of Temperature

Effect of temperature and additives on the yields of products and microwave pyrolysis behaviors of wheat straw

2013 ◽  
Vol 100 ◽  
pp. 49-55 ◽  
Author(s):  
Xiqiang Zhao ◽  
Min Wang ◽  
Hongzhen Liu ◽  
Chao Zhao ◽  
Chunyuan Ma ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Effect Of Temperature ◽  
Microwave Pyrolysis

Effect of Dilute-Acid-Hydrolysis Treatments on the Utilization of Wheat Straw by Rumen Bacteria and Free Enzymes

1992 ◽  
Vol 1992 ◽  
pp. 212-212
Author(s):  
F.B. de Castro ◽  
P.M. Hotten ◽  
E.R. Ørskov
Keyword(s):  
Cell Wall ◽  
Acid Hydrolysis ◽  
Wheat Straw ◽  
Effect Of Temperature ◽  
Rumen Bacteria ◽  
Dilute Acid ◽  
Cell Wall Polysaccharides ◽  
Dilute Acid Hydrolysis ◽  
Physical Treatment ◽  
Hydrolysis Of

Extensive hydrolysis of cell wall polysaccharides by rumen bacteria or free enzymes has been reported when lignocellulosic materials had been treated with steam and pressure (Dekker & Wallis, 1983; Castro & Machado, 1989). This has mainly been explained by complete hydrolysis of hemicellulose, lignin depolymerization and redistribution within the cell wall and increasing accessible pore volume by swelling of the cell walls. Physical treatment based on use of steam and pressure alone (auto-hydrolysis) is always associated with the release of toxic levels of furfural and phenolic monomers. These chemicals are able to inhibit the activity of rumen microorganisms, yeasts and free enzymes. To overcome this effect, dilute-acid-hydrolysis at low temperatures and pressures has been proposed (Grohmann et al., 1985). The aim of this study was to evaluate the effect of temperature, sulphuric acid concentration and reaction time on the utilization of treated wheat straw by dilute-acid-hydrolysis, either by rumen bacteria and free enzymes.

scholarly journals Effectiveness of Adding Extruded Wheat Straw to Poultry Manure to Increase the Rate of Biogas Yield

2021 ◽  
pp. 111-124
Author(s):  
Victor Polishchuk ◽  
◽  
Sergey Shvorov ◽  
Nikolay Zablodskiy ◽  
Piotr Kucheruk ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Anaerobic Fermentation ◽  
Poultry Manure ◽  
Inhibitory Effect ◽  
Ammonium Nitrogen ◽  
Chicken Manure ◽  
Methane Yield ◽  
High Concentration ◽  
Biogas Yield ◽  
Volatile Solids

The work is aimed at increasing the biogas yield rate at biogas plants by means of codigestion poultry manure in combination with extruded wheat straw. To achieve this goal a series of batch tests were performed to study the yields of biogas and CH4 in anaerobic fermentation of mixtures of manure with extruded wheat straw. The working hypothesis of the study was that the wheat straw addition would allow optimizing carbon to nitrogen ratio reducing thus the inhibitory effect of ammonium nitrogen contained in poultry manure on the digestion process. The most important result of the study consisted in the development of a methodology for determining the efficient ratios of extruded straw to poultry manure, at which the highest rate of methane yield was ensured. The two series of the batch assays at 36°C were performed to study the effect of the straw addition to chicken manure at high and low initial volatile solids concentrations. In each series, three types of mixtures were prepared – with 100%, 65% and 35% of poultry manure by volatile solids content in the combination with wheat straw pellets. The significance of the research results was in the fact that the use of extruded straw together with chicken manure could increase the rate of methane yield by almost two times, compared to the fermentation of only poultry manure. The positive effect of wheat straw addition to poultry manure was found in mixtures with a high initial volatile solids concentration, and hence, a high concentration of nitrogen.

scholarly journals Improved Anaerobic Fermentation of Wheat Straw by Alkaline Pre-Treatment and Addition of Alkali-Tolerant Microorganisms

2015 ◽  
Vol 2 (2) ◽  
pp. 66-93 ◽  
Author(s):  
Heike Sträuber ◽  
Franziska Bühligen ◽  
Sabine Kleinsteuber ◽  
Marcell Nikolausz ◽  
Katharina Porsch
Keyword(s):  
Wheat Straw ◽  
Anaerobic Fermentation ◽  
Pre Treatment

scholarly journals Effect of Temperature on Hydrolase Activity in Mackerel Tissue

1971 ◽  
Vol 37 (7) ◽  
pp. 634-637
Author(s):  
Fumio NAGAYAMA ◽  
Sadao YASUMURA ◽  
Shuzo SAKUMA ◽  
Masaji HIKOSAKA
Keyword(s):  
Hydrolase Activity ◽  
Effect Of Temperature

Effect of Human Excreta Mixture on Biogas Production

2011 ◽  
Vol 347-353 ◽  
pp. 2570-2575 ◽  
Author(s):  
Zi Lin Song ◽  
Jia Jia Qin ◽  
Gai He Yang ◽  
Yong Zhong Feng ◽  
Guang Xin Ren
Keyword(s):  
Wheat Straw ◽  
Fermentation Process ◽  
Production Efficiency ◽  
Anaerobic Fermentation ◽  
Biogas Production ◽  
The Other ◽  
Corn Straw ◽  
Generation Efficiency ◽  
Human Excreta ◽  
Biomass Resource

China is a large agricultural country that has abundant biomass resource which can be generated biogas for heating and lighting. To improve biogas production efficiency of human excreta, which is a main kind of material in household biogas use, a laboratory-scale simulated experimental using self-designed constant temperature anaerobic fermentation equipment was conducted in our study. The results showed that increase of temperature can improve biogas generation efficiency of human excreta, and the other way is to mix the human excreta with other materials especially with the high C materials. Compare with the high costing of increase temperature, co-digestion with wheat straw has obvious advances: the crop straw can easily obtain and both wastes can be handled in the anaerobic fermentation process. The co-digestion developed in our study may be applicable to human excreta with other crop straws such as corn straw for biogas production.

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