Anaerobic Fermentation

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Qi Zhou - One of the best experts on this subject based on the ideXlab platform.

  • effect of nonylphenol on volatile fatty acids accumulation during Anaerobic Fermentation of waste activated sludge
    Water Research, 2016
    Co-Authors: Xu Duan, Xiao Wang, Leiyu Feng, Qi Zhou
    Abstract:

    Most of the reported studies on Anaerobic Fermentation of sludge focused on the influences of operating conditions, pretreatment methods, and its characteristics, and little attention was paid to those of persistent organic pollutants (POPs) which widespreadly appeared in sludge. In this study, the effect of nonylphenol, a typical POPs in waste activated sludge (WAS), on Anaerobic Fermentation for volatile fatty acids (VFAs) accumulation was investigated. The concentration of VFAs during WAS Anaerobic Fermentation was found to be affected positively from 2856 mg COD/L in the control (without NP) to 5620 mg COD/L with NP of 200 mg/kg dry sludge. Mechanism exploration exhibited that the main reason for the enhanced VFAs accumulation in the presence of NP was that more acetic acid was generated during the acidification of WAS, which was increased by almost three times (3790 versus 1310 mg COD/L). In WAS Fermentation systems, the abundance of Anaerobic functional microorganisms was advantageous to the accumulation of acetic acid. Further investigation by the pure acetogen revealed that both the viability and activity of Proteiniphilum acetatigenes were improved by NP during Anaerobic Fermentation, resulting in more production of acetic acid and showing good agreement with that in the real WAS Fermentation systems.

Hyon Hee Yoon - One of the best experts on this subject based on the ideXlab platform.

  • volatile fatty acids production from marine macroalgae by Anaerobic Fermentation
    Bioresource Technology, 2012
    Co-Authors: Thi Nhan Pham, Young Joong Jeon, Hyon Hee Yoon
    Abstract:

    Abstract Volatile fatty acids (VFAs) were produced from the marine macroalgae, Laminaria japonica , Pachymeniopsis elliptica , and Enteromorpha crinite by Anaerobic Fermentation using a microbial community derived from a municipal wastewater treatment plant. Methanogen inhibitor (iodoform), pH control, substrate concentration, and alkaline and thermal pretreatments affected VFA productivity. Acetic, propionic, and butyric acids were the main products. A maximum VFA concentration of 15.2 g/L was obtained from 50 g/L of L. japonica in three days at 35 °C and pH 6.5–7.0. Pretreatment with 0.5 N NaOH improved VFA productivity by 56% compared to control. The result shows the applicability of marine macroalgae as biomass feedstock for the production of VFAs which can be converted to mixed alcohol fuels.

Zhang Dalei - One of the best experts on this subject based on the ideXlab platform.

  • Study on the status of two-phase Anaerobic Fermentation for crop straws.
    Renewable Energy Resources, 2020
    Co-Authors: Bian Yongcun, Li Shimi, Zhang Dalei
    Abstract:

    The technology of two-phase Anaerobic Fermentation has a series of characteristics and advantages,because of the separation of acidogenic phase and methanogenic phase,is gradually gotten people's attention. Consider the crop straw characteristic of difficult to be degraded,the paper mainly introduce about the two-phase Anaerobic Fermentation process in the straws pretreatment technology,and introduce the control process parameters of hydrolysis and acidogenesis,meanwhile,introduce several reactors of two-phase Anaerobic Fermentation,finally,briefly discuss the further research process of two-phase Anaerobic Fermentation of crop straws.

  • Study on expanding technology for dry Anaerobic Fermentation of corn stalks
    Renewable Energy Resources, 2020
    Co-Authors: Zhang Dalei
    Abstract:

    The study on the changes in composition and structure of corn stalk after puffing process was carried out,and the experimental study on the dry Anaerobic Fermentation of the expanded corn stalk was followed.The result shows,for the corn stalk treated by expanding,there is a signifi-cant increase for the amount of reducing sugar,the crystallinity of cellulose has been brought down to 12.68%,the internal structure of straw also has been changed.For the dry Anaerobic Fermentation process,the reaction is started fast,the rate of gas production and methane content have been increased over that of non-expanded corn stalk,the maximum rate of gas production was 0.916 m3/(m3.d),the methane content was up to 80.2%.

Ping Ning - One of the best experts on this subject based on the ideXlab platform.

  • Enhanced Anaerobic Fermentation of dairy manure by microelectrolysis in electric and magnetic fields
    Renewable Energy, 2020
    Co-Authors: Guangfei Qu, Pei Lv, Can Tu, Xi Ma, Ping Ning
    Abstract:

    Abstract The degradation rate of lignocellulose and methane (CH4) content must be improved through Anaerobic Fermentation process engineering in order to promote the proper operation of Anaerobic organic waste removal without secondary pollution and low cost. The present study investigates mesophilic Anaerobic Fermentation of dairy manure (DM) under weak magnetic and low operation voltage (0.3–0.8 V). The results showed that the effect of electric and magnetic fields (EMF) can significantly enhance the Fermentation, and improve the CH4 content of biogas and accelerate the degradation rate of lignocellulose. Fe-C microelectrolysis intensified the Anaerobic Fermentation of DM, the highest CH4 content was 87%, the cellulose degradation rate was 36%, increased by 125%, and the lignin degradation rate was 23%, increased by 203%, under loading 0.5 V voltage and weak magnetic field. Metagenome sequence results showed that EMF and Fe-C microelectrolysis can not only promote the microbial diversity, but also increase the abundance of functional microorganisms at various stages. This finding provides theoretical support and foundation for the extraordinary efficiency degradation of lignocellulose and the electric and magnetic regulation of Anaerobic Fermentation microorganism system.

  • Electropolar effects on Anaerobic Fermentation of lignocellulosic materials in novel single-electrode cells
    Bioresource Technology, 2014
    Co-Authors: Guangfei Qu, Weixia Qiu, Dongwei Zhong, Yuhuan Liu, Ping Ning
    Abstract:

    As a promising renewable energy technology, Anaerobic Fermentation is consistently limited by low production and calorific value of biogas, along with the difficulty of lignocellulose degradation. The effects of polarity and micro-voltage on Anaerobic Fermentation from lignocellulosic materials were investigated in single-electrode fermenter to explore cost-efficient technology. The results illustrated that the biogas production and quality were significantly affected by electric polarity. And cathode-assisted Fermentation led to more positive effects than anode-assisted. Compared with results in control group without electrode, the average biogas and methane yield under cathodic micro-voltage (-250mV) were astonishingly improved by 2.82 and 2.44mLg-1d-1respectively. Meanwhile, the degradation ratios of lignin and cellulose were also improved by 23.11% and 19.46%. It demonstrated that single micro-voltage can not only promote lignocellulose degradation but biogas production and calorific value. These micro-voltage effects on Fermentation process also provided great opportunity to breakthrough the present limitation of lignocellulosic materials Fermentation. © 2014 Elsevier Ltd.

  • The Resource Utilization of Anaerobic Fermentation Residue
    Procedia environmental sciences, 2012
    Co-Authors: Hui Feng, Guangfei Qu, Ping Ning, Xiangfeng Xiong, Jun Zhang
    Abstract:

    Abstract The popularization of biogas project produced a large number of Anaerobic Fermentation residues. The resource recycling and harmless utilization of these residues have become one of the hottest researches of related areas. This article summarizes the current situation about researching and utilization of biogas slurry and residues contained their components, functions and status of study domestic and foreign systematically. This study introduces the basic characters of biogas slurry and residues, and systematically summarizes it's newly application and investigation all over the world, and also pointed out the shortcomings. Finally, we forecast the new ways of Anaerobic Fermentation residues utilization from ecological, environmental and economic points of view.

Xu Duan - One of the best experts on this subject based on the ideXlab platform.

  • effect of nonylphenol on volatile fatty acids accumulation during Anaerobic Fermentation of waste activated sludge
    Water Research, 2016
    Co-Authors: Xu Duan, Xiao Wang, Leiyu Feng, Qi Zhou
    Abstract:

    Most of the reported studies on Anaerobic Fermentation of sludge focused on the influences of operating conditions, pretreatment methods, and its characteristics, and little attention was paid to those of persistent organic pollutants (POPs) which widespreadly appeared in sludge. In this study, the effect of nonylphenol, a typical POPs in waste activated sludge (WAS), on Anaerobic Fermentation for volatile fatty acids (VFAs) accumulation was investigated. The concentration of VFAs during WAS Anaerobic Fermentation was found to be affected positively from 2856 mg COD/L in the control (without NP) to 5620 mg COD/L with NP of 200 mg/kg dry sludge. Mechanism exploration exhibited that the main reason for the enhanced VFAs accumulation in the presence of NP was that more acetic acid was generated during the acidification of WAS, which was increased by almost three times (3790 versus 1310 mg COD/L). In WAS Fermentation systems, the abundance of Anaerobic functional microorganisms was advantageous to the accumulation of acetic acid. Further investigation by the pure acetogen revealed that both the viability and activity of Proteiniphilum acetatigenes were improved by NP during Anaerobic Fermentation, resulting in more production of acetic acid and showing good agreement with that in the real WAS Fermentation systems.