scholarly journals Biological pretreatment of corn straw for enhancing degradation efficiency and biogas production

Bioengineered ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 251-260 ◽  
Author(s):  
Panpan Li ◽  
Chao He ◽  
Gang Li ◽  
Pan Ding ◽  
Mingming Lan ◽  
...  
Keyword(s):  
Biogas Production ◽  
Degradation Efficiency ◽  
Biological Pretreatment ◽  
Corn Straw

RETRACTED: Comparison of chemical and biological pretreatment of corn straw for biogas production by anaerobic digestion

2011 ◽  
Vol 36 (6) ◽  
pp. 1875-1879 ◽  
Author(s):  
Weizhang Zhong ◽  
Zhongzhi Zhang ◽  
Wei Qiao ◽  
Pengcheng Fu ◽  
Man Liu
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Biological Pretreatment ◽  
Corn Straw

The Influence of Leachate Refluence on Dry Mesophilic Co-Fermentation

2013 ◽  
Vol 295-298 ◽  
pp. 1735-1739
Author(s):  
Fu Bin Yin ◽  
Zi Fu Li ◽  
Shuang Hou ◽  
Xiao Feng Bai ◽  
Ting Ting Wang
Keyword(s):  
Biogas Production ◽  
Methane Content ◽  
Chicken Manure ◽  
Good Effect ◽  
Corn Straw ◽  
Biogas Yield

The main objectives of this research were to determine the effect of leachate refluence on biogas production for dry mesophilic co-fermentation of chicken manure and corn straw. The biogas production, the ratio of biogas production, methane content and pH were analyzed. The results showed that the leachate refluence has a significant impact on biogas production of dry co-fermentation. The cumulative biogas yield of the once in 48h has an increase by 10% and 5% for no reflux and once in 24h, respectively. The leachate refluence has little influence on the methane content, but it has good effect to keep pH in the optimum rang.

scholarly journals Construction of in situ degradation bacteria of corn straw and analysis of its degradation efficiency

2020 ◽  
Vol 70 (1) ◽  
Author(s):  
Xiujie Gong ◽  
Hongtao Zou ◽  
Chunrong Qian ◽  
Yang Yu ◽  
Yubo Hao ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Degradation Efficiency ◽  
Corn Straw ◽  
X Ray ◽  
In Situ Degradation ◽  
Infrared Spectrometer ◽  
Scanning Electron

Abstract Purpose The highly efficient degradation bacteria were selected from the humus from the very cold straw in China for many years to construct the in situ degradation bacteria, and the degradation efficiency of corn straw was determined by process optimization. Methods According to the main components of corn straw, through morphological, physiological, and biochemical screening, three highly efficient complementary degradation strains were selected to construct the compound flora, and the degradation efficiency was analyzed by Fourier transform infrared spectrometer, field emission scanning electron microscope, and X-ray diffractometer. Result The corn straw selected in this paper is mainly composed of cellulose (31.99%), hemicellulose (25.33%), and lignin (14.67%). Through the determination of enzyme activity, strain Streptomyces sp. G1T has high decomposition ability to cellulose and hemicellulose but weak utilization ability to lignin; strain Streptomyces sp. G2T has the strongest decomposition ability to cellulose and hemicellulose among the three strains. The decomposition ability of strain Streptomyces sp. G3T to lignin was the strongest among the three strains. Therefore, by compounding the three strains, the decomposition ability has been greatly improved. The optimal process conditions obtained by single factor and response surface method are as follows: pH is 7, temperature is 30 °C, inoculation amount is 5%, rotational speed is 210 rpm, and the weight loss rate of straw is 60.55% after decomposing for 7 days. A large amount of degradation of corn straw can be seen by Fourier transform infrared spectrometer, field emission scanning electron microscope, and X-ray diffractometer. Conclusion Streptomyces sp. G1T, Streptomyces sp. G2T, and Streptomyces sp. G3T screened from straw humus in very cold areas were used to construct in situ degradation bacteria, which had good straw degradation activity and had the potential to be used for straw treatment in cold areas after harvest. This characteristic makes the complex bacteria become a strong competitive candidate for industrial production, and it is also an effective biotechnology in line with the current recycling of resources.

A sustainable approach for efficient conversion of lignin into biodiesel accompanied by biological pretreatment of corn straw

2019 ◽  
Vol 199 ◽  
pp. 111928 ◽  
Author(s):  
Kai Zhang ◽  
Rong Xu ◽  
Abd El-Fatah Abomohra ◽  
Shangxian Xie ◽  
Zhengsheng Yu ◽  
...  
Keyword(s):  
Biological Pretreatment ◽  
Corn Straw ◽  
Efficient Conversion

scholarly journals Effect of liquid digestate recirculation on biogas production and enzyme activities for anaerobic digestion of corn straw

2020 ◽  
Author(s):  
Shuaixing Xue ◽  
Ling Qiu ◽  
Xiaohui Guo ◽  
Yiqing Yao
Keyword(s):  
Anaerobic Digestion ◽  
Enzyme Activities ◽  
Volatile Fatty Acids ◽  
Biogas Production ◽  
Coenzyme F420 ◽  
Total Volatile ◽  
Corn Straw ◽  
Liquid Digestate ◽  
Acid Accumulation ◽  
Peak Value

Abstract To accelerate the degradation of substrate, 50% liquid digestate recirculation (LDR) was used in the anaerobic digestion (AD) of corn straw. The effects of recirculation on the enzyme activities and biogas production were investigated by comparing with control reactor (ReactorCK). During the AD process, the fermentation system with 50% LDR was more stable. The average biogas and methane production in ReactorLDR were 7,891 mL·d−1 and 347 mL CH4·g−1 VSadded·d−1 respectively. The total volatile fatty acids (TVFAs) concentration in the two reactors both increased at first and then decreased with time. The LDR made the VFAs accumulation significant, especially propionic acid accumulation in 4 ∼ 16 days. The maximum peak value of cellulase, xylanase, dehydrogenase and coenzyme F420 activities in ReactorLDR were 0.51 mg·g−1·h−1, 0.29 mg·g−1·h−1, 4.88 mL·g−1·h−1 and 6.69 μmol·L−1, respectively, which were higher than that in ReactorCK. With or without recirculation, the concentration of TVFAs was positively correlated with cellulase, xylanase and dehydrogenase activities, while was negatively correlated with coenzyme F420 activity. Besides, a very significant correlation existed between hydrolase and dehydrogenase activities and daily biogas production in ReactorCK. And the peaks of cellulase, xylanase and dehydrogenase activities appeared ahead of the peak of daily biogas production with the LDR.

scholarly journals Promotion of Biogasification Efficiency by Pretreatment and Bioaugmentation of Corn Straw with Microbial Consortium

2019 ◽  
Vol 118 ◽  
pp. 01032
Author(s):  
Qili Zhu ◽  
Yanwei Wang ◽  
Furong Tan ◽  
Bo Wu ◽  
Lichun Dai ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Surface Structure ◽  
Degradation Rate ◽  
Microbial Consortium ◽  
Biogas Production ◽  
Cellulose Degradation ◽  
Cellulase Activity ◽  
Corn Straw ◽  
Structure Characteristics ◽  
Anaerobic Microbial Consortium

To better understand the comparative effects between pretreatment and bioaugmentation methods on the promotion of corn straw biogasification efficiency, we analysed the cellulase activity, cellulose degradation rate, surface structure characteristics, and biogas production of corn straw that had been pretreated with aerobic microbial consortium (AMC). In addition, we also studied the effect of bioaugmentation using anaerobic microbial consortium (ANMC) on corn straw biogasification efficiency. The results from our study demonstrated that the cumulative methane generated from AMC and ANMC were 233.09 mL·g-1 VS and 242.56 mL·g-1 VS, which was increased compared to the control by 6.89% and 11.23%, respectively. We also observed that ANMC could also function to dramatically promote methane content during the anaerobic digestion of corn straw. This study demonstrated that AMC and ANMC were both able to promote the biogasification efficiency of corn straw, however, ANMC was found to perform better compared to AMC.

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