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

  • Effect of zinc ion on photo-fermentative hydrogen production performance, kinetics and electronic distribution in biohydrogen production by HAU-M1.
    Bioresource technology, 2021
    Co-Authors: Huan Zhang, Lei Chen, Quanguo Zhang
    Abstract:

    The aim of this work was to study the characteristics, kinetics and electronic distribution of Photo-Fermentation hydrogen production (PFHP) with Zn2+ addition then gave the main results that the addition of Zn2+ can effectively improve hydrogen production with an increasing of 1-5 mg/L Zn2+ concentration. The maximum hydrogen yield of 592 ± 13 mL and shortest lag time of 4.67 h were obtained at 2 mg/L Zn2+. 26.42% of the substrate energy was diverted to H2. Modified Gompertz and Hane-Levenspiel models were applied to evaluate the effect of Zn2+ on PFHP by mixed bacteria HAU-M1, the constants n and m obtained by fitting models were 14.97 and 58.79, respectively, indicating the fermentation system was noncompetitive inhibition, the predicted critical Zn2+ concentration was 40.83 mg/L.

  • Insights into correlation between hydrogen yield improvement and glycerol addition in Photo-Fermentation of Arundo donax L.
    Bioresource technology, 2020
    Co-Authors: Danping Jiang, Zhiping Zhang, Xueting Zhang, Tian Yue, Yang Zhang, Tian Zhang, Quanguo Zhang
    Abstract:

    This study aimed to explore the correlation between hydrogen yield improvement of Photo-Fermentation of Arundo donax L. and glycerol addition. Different glycerol concentrations (g/L) (0, 10, 15, 20, and 30) were replenished to establish co-substrate system. And statistical analysis was introduced to evaluate the correlation. The maximum hydrogen yield improvement (294%) was obtained from glycerol addition of 15 g/L in comparison with mono-substrate system of Arundo donax L. Under the optimal glycerol addition (15 g/L), the glycerol/Arundo donax L. ratio, C/N ratio, initial medium redox potential (Eh), and solid/liquid ratio were 1:1, 25.1, 57 mV, and 1/68, respectively. In addition, canonical correlation analysis (CCA) indicated that initial and final medium redox potential (Eh) had the strongest relationship with yield improvement of Photo-Fermentation. Moreover, Pearson's correlation analysis claimed that Arundo donax L./glycerol ratio played a key role during the photo-fermentative hydrogen production (PFHP) process.

  • Enhancement of the biohydrogen production performance from mixed substrate by Photo-Fermentation: Effects of initial pH and inoculation volume ratio.
    Bioresource technology, 2020
    Co-Authors: Xueting Zhang, Zhiping Zhang, Huan Zhang, Danping Jiang, Yanjin Wang, Quanguo Zhang
    Abstract:

    Co-digestion of substrates can improve hydrogen yield (HY) by adjusting carbon nitrogen ratio (C/N) of fermentation substrates. This study evaluated the enhancement of hydrogen production from co-digestion of duckweed and corn straw via Photo-Fermentation. The maximum HY of 78.0 mL/g Total solid (TS) was obtained from the mixed ratio of 5:1 (C/N of 13.2), which was 25.4% and 29.6% higher than those of single substrate of duckweed and corn straw, respectively. The effects of initial pH and inoculation volume ratio (IVR) on co-digestion photo-fermentative hydrogen production (CD-PFHP) from duckweed and corn straw were further studied. A maximum HY of 85.6 mL/g TS was achieved under the optimal condition (initial pH 8, IVR 20%, mix ratio of duckweed and corn straw of 5:1). Additionally, both mix ratio and initial pH showed statistical difference (p 

  • Enhanced buffer capacity of fermentation broth and biohydrogen production from corn stalk with Na2HPO4/NaH2PO4.
    Bioresource technology, 2020
    Co-Authors: Nadeem Tahir, Zhiping Zhang, Jian Wang, Kaixin Wang, Danping Jiang, Guo Siyi, Quanguo Zhang
    Abstract:

    Abstract The remarkable buffer capacity of buffer solution can significantly improve the biohydrogen production yield and energy conversion efficiency. In the present study, the effect of buffer solution Na2HPO4/NaH2PO4 on buffer capacity of fermentation broth and Photo-Fermentation biohydrogen production (PFHP) was studied. Gas characteristics, fermentation broth properties, and kinetic parameters in PFHP were investigated. With the increase in pH values (5–7) of buffer solution Na2HPO4/NaH2PO4, firstly hydrogen yield increased and then decreased. Maximum energy conversion efficiency 9.84%, hydrogen yield 132.69 mL/g corn stalk, and hydrogen content 53.88% were achieved at pH value of 6. The results of one-way ANOVA showed that pH values of fermentation broth and cumulative hydrogen production were strongly affected by pH values of buffer solution. Buffer solution Na2HPO4/NaH2PO4 retarded the decrease of pH value of Photo-Fermentation broth, and significantly improved the PFHP.

  • Capacity Analysis of Photo-Fermentation Bio-Hydrogen Production from Different Food Wastes
    Journal of Biobased Materials and Bioenergy, 2020
    Co-Authors: Zhiping Zhang, Shengnan Zhu, Wang Chenyang, Yanyan Jin, Quanguo Zhang
    Abstract:

    Food waste is rich in starch or cellulose, which can be utilized as carbon source for fermentation. Hence, in this paper, different food wastes (vegetable, rice, corn, potato) were taken as substrate to evaluate their hydrogen yield potential. The characteristics of fermentation broth, cumulative hydrogen yield, and hydrogen production rate were investigated in the Photo-Fermentation bio-hydrogen production process. Modified Gompertz Model was utilized to deal with experiment data. Results showed that food waste can be effectively utilized by photosynthetic bacteria. Waste rice was determined to have the best hydrogen production capacity with hydrogen yield of 696 mL, and the maximum hydrogen production rate of 17.71 mL/h, the average hydrogen concentration was 55.78%.

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

Nan-qi Ren - One of the best experts on this subject based on the ideXlab platform.

  • Simultaneous hydrogen and ethanol production from cascade utilization of mono-substrate in integrated dark and photo-fermentative reactor
    Biotechnology for biofuels, 2015
    Co-Authors: Bing-feng Liu, Guo-jun Xie, Jie Ding, Defeng Xing, Rui-qing Wang, Xu Zhou, Hong Yu Ren, Nan-qi Ren
    Abstract:

    Background Integrating hydrogen-producing bacteria with complementary capabilities, dark-fermentative bacteria (DFB) and photo-fermentative bacteria (PFB), is a promising way to completely recover bioenergy from waste biomass. However, the current coupled models always suffer from complicated pretreatment of the effluent from dark-fermentation or imbalance between dark and Photo-Fermentation, respectively. In this work, an integrated dark and photo-fermentative reactor (IDPFR) was developed to completely convert an organic substrate into bioenergy.

  • Carrier modification and its application in continuous photo-hydrogen production using anaerobic fluidized bed photo-reactor
    GCB Bioenergy, 2013
    Co-Authors: Hong Yu Ren, Bing-feng Liu, Guo-jun Xie, Lei Zhao, Nan-qi Ren
    Abstract:

    Poor hydrogen production performance and low biomass limit the practical application of Photo-Fermentation. To improve the immobilization capability of bacteria and hydrogen production performance, activated carbon fibers (ACFs) were modified by acidic, alkaline, and neutral solutions. The modified ACFs were further used in the anaerobic fluidized bed photo-reactor (AFBPR) to explore its continuous operation characteristics. Results showed that among the three reagents, nitric acid was the most efficient for ACF modification, and the maximum yield and production rate of hydrogen increased between about 33.6% and 65.8% compared to the control. Furthermore, with the optimal influent glutamate concentration (10 mmol L−1) and light intensity (4000 lux), the AFBPR gave efficient and stable performance with hydrogen yield of 2.26 mol H2 mol−1 acetate and hydrogen production rate of 25.8 mL L−1 h−1. The results showed the potential of using the AFBPR with HNO3-modified ACF carriers for the large-scale production of bio-hydrogen.

  • Biological hydrogen production by dark fermentation: challenges and prospects towards scaled-up production.
    Current opinion in biotechnology, 2011
    Co-Authors: Nan-qi Ren, Bing-feng Liu, Wan-qian Guo, Guang-li Cao, Jie Ding
    Abstract:

    Among different technologies of hydrogen production, bio-hydrogen production exhibits perhaps the greatest potential to replace fossil fuels. Based on recent research on dark fermentative hydrogen production, this article reviews the following aspects towards scaled-up application of this technology: bioreactor development and parameter optimization, process modeling and simulation, exploitation of cheaper raw materials and combining dark-fermentation with Photo-Fermentation. Bioreactors are necessary for dark-fermentation hydrogen production, so the design of reactor type and optimization of parameters are essential. Process modeling and simulation can help engineers design and optimize large-scale systems and operations. Use of cheaper raw materials will surely accelerate the pace of scaled-up production of biological hydrogen. And finally, combining dark-fermentation with Photo-Fermentation holds considerable promise, and has successfully achieved maximum overall hydrogen yield from a single substrate. Future development of bio-hydrogen production will also be discussed.

  • Optimization of Photo-Hydrogen Production by Immobilized Rhodopseudomonas Faecalis RLD-53
    Natural Resources, 2011
    Co-Authors: Bing-feng Liu, Guo-jun Xie, Wan-qian Guo, Jie Ding, Nan-qi Ren
    Abstract:

    In this work, the optimization of hydrogen production by Photo-Fermentation bacteria immobilized on agar gel granule was systematic investigated in batch culture. Experiment focus on the effect of some important affecting factors on photo-hydrogen production. Results indicated that immobilized Rhodopseudomonas faecalis RLD-53 exhibited the highest hydrogen yield of 3.15 mol H2/mol acetate under follow optimal condition: agar granule diameter of 2.5 mm, inoculum age of 24 h, agar concentration of 2%, biomass of 4 mg/ml in agar and light intensity of 9000 lux. More importantly, immobilized Photo-Fermentation bacteria not only can enhance hydrogen production but can increase acids-tolerance capacity, even at pH 5.0 hydrogen also was produced, and thus hopefully immobilized Photo-Fermentation bacteria can be applied in the combination of dark and Photo-Fermentation for hydrogen production with high yield

  • Enhanced bio-hydrogen production by the combination of dark- and Photo-Fermentation in batch culture.
    Bioresource technology, 2010
    Co-Authors: Bing-feng Liu, Guo-jun Xie, Wan-qian Guo, Jie Ding, Nan-qi Ren, Defeng Xing
    Abstract:

    In this study, some key factors, for example, diluted ratio of effluents, the ratio of dark-photo bacteria, light intensity and light/dark cycle influencing hydrogen production by combining Clostridium butyricum and immobilized Rhodopseudomonas faecalis RLD-53 in batch culture, were investigated. Experimental results showed the photo-hydrogen yield decreased when increasing diluted ratio from 1:0.5 to 1:3, and it reached the maximum value of 4368 ml-H(2)/l-effluents at the ratio of 1:0.5. When the ratio of dark-photo bacteria was at 1:2, the hydrogen yield reached highest value of 4.946 mol-H(2)/mol-glucose and cumulative hydrogen volume was 5357 ml-H(2)/l-culture during the combination process. When the light intensity was at 10.25 W/m(2), the hydrogen volume of Photo-Fermentation and the combination process reached maximum value of 4260 ml-H(2)/l-effluents and 5892 ml-H(2)/l-culture, respectively. During the combination process, maximum total hydrogen yield was 5.374 mol-H(2)/mol-glucose. Meanwhile, hydrogen production under light/dark cycle was evaluated.

Jo Shu Chang - One of the best experts on this subject based on the ideXlab platform.

  • Perspectives on cultivation strategies and photobioreactor designs for photo-fermentative hydrogen production.
    Bioresource technology, 2011
    Co-Authors: Chun Yen Chen, Chia Hsien Liu, Jo Shu Chang
    Abstract:

    Photosynthetic bacteria have considerable biotechnological potential for biological hydrogen production due to higher substrate conversion efficiency and hydrogen yield. Phototrophic fermentation using photosynthetic bacteria has a major advantage of being able to further convert the byproducts originating from dark fermentation (e.g., volatile fatty acids) to hydrogen. Through the combination of dark and Photo-Fermentation processes, organic feedstock is fully converted into gaseous product (H2) at the highest possible H2 yield, with significant reduction of chemical oxygen demand (COD). The performance of Photo-Fermentation is highly dependent on the medium composition, culture conditions, and photobioreactor design. Therefore, this article provides a critical review of the effects of key factors affecting the photo-hydrogen production efficiency of photosynthetic bacteria, and also summarizes the strategies being applied in promoting the performance of Photo-Fermentation.

  • Material and energy balances of an integrated biological hydrogen production and purification system and their implications for its potential to reduce greenhouse gas emissions.
    Bioresource technology, 2011
    Co-Authors: Yasuhiro Fukushima, Yu Jung Huang, Jhen Wei Chen, Hung Chun Lin, Liang Ming Whang, Hsin Chu, Jo Shu Chang
    Abstract:

    Abstract The materials and energy in an integrated biological hydrogen production and purification system involving hydrolysis, dark fermentation, photo fermentation, CO2 fixation and anaerobic digestion are balanced by integrating the results from multiple experiments, simulations and the literature. The findings are two fold. First, using 1000 kg rice straw as a substrate, 19.8 kg H2 and 138.0 kg CH4 are obtained. The net energy balance (NEB) and net energy ratio (NER) are −738.4 kWh and 77.8%, respectively, both of which imply an unfavorable energy production system. Opportunities to improve the performance particularly lie in the photo fermentation process. Second, greenhouse gas emissions are evaluated for various options. The results were comparable with the emission inventory of electricity generated from fossil fuels. NEB and NER under a zero-carbon-emission constraint were discussed in detail to clarify completely the implications of the energy and material balances on greenhouse gas emissions.

  • Sequential dark–photo fermentation and autotrophic microalgal growth for high-yield and CO2-free biohydrogen production
    International Journal of Hydrogen Energy, 2010
    Co-Authors: Chun Yen Chen, Chi-mei Lee, Jo Shu Chang
    Abstract:

    Dark fermentation, photo fermentation, and autotrophic microalgae cultivation were integrated to establish a high-yield and CO2-free biohydrogen production system by using different feedstock. Among the four carbon sources examined, sucrose was the most effective for the sequential dark (with Clostridium butyricum CGS5) and photo (with Rhodopseudomonas palutris WP3-5) fermentation process. The sequential dark-photo fermentation was stably operated for nearly 80 days, giving a maximum H-2 yield of 11.61 mol H-2/mol sucrose and a H-2 production rate of 673.93 ml/h/l. The biogas produced from the sequential dark-photo fermentation (containing ca. 40.0% CO2) was directly fed into a microalga culture (Chlorella vulgaris C-C) cultivated at 30 degrees C under 60 mu mol/m(2)/s illumination. The CO2 produced from the fermentation processes was completely consumed during the autotrophic growth of C. vulgaris C-C, resulting in a microalgal biomass concentration of 1999 mg/l composed mainly of 48.0% protein, 23.0% carbohydrate and 12.3% lipid. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved

  • Biohydrogen production using sequential two-stage dark and photo fermentation processes
    International Journal of Hydrogen Energy, 2008
    Co-Authors: Chun Yen Chen, Mu Hoe Yang, Kuei Ling Yeh, Chien Hung Liu, Jo Shu Chang
    Abstract:

    A two-stage process combining dark/photo fermentation was used to increase the overall hydrogen yield from sucrose and also to reduce the chemical oxygen demand (COD) in the effluent. Dark-H2 fermentation was conducted using Clostridium pasteurianum CH4, giving a maximum H2 production yield of 3.80 mol H2/mol sucrose. The soluble metabolites resulting from dark fermentation, consisting of butyric and acetic acid, were further used for H2 production in the subsequent photo fermentation. Using soluble products from dark fermentation as substrate, Rhodopseudomonas palustris WP3-5 could produce H2 phototrophically, elevating the total hydrogen yield from 3.80 (dark fermentation) to 10.02 mol H2/mol sucrose (dark/photo fermentation). Meanwhile, a 72.0% COD removal was also achieved. When the photobioreactor was illuminated with side-light optical fibers and was supplemented with 2.0% (w/v) of clay carriers, the overall H2 yield of the two-stage process was further enhanced to 14.2 mol H2/mol sucrose with a nearly 90% COD removal. Continuous photo fermentation was also carried out at 96 h HRT using effluent from dark fermentation as the feed. The continuous culture maintained stable for nearly 10 days with an average H2 yield of 10.21 mol H2/mol sucrose. This demonstrates the feasibility of using the two-stage process combining dark and photo fermentation for simultaneous hydrogen production and COD removal.

  • Combining enzymatic hydrolysis and dark–photo fermentation processes for hydrogen production from starch feedstock: A feasibility study
    International Journal of Hydrogen Energy, 2008
    Co-Authors: Shing Der Chen, Chun Yen Chen, Tien I. Huang, Chiu-yue Lin, Jo Shu Chang
    Abstract:

    Abstract In this work, an integrated enzymatic hydrolysis and dark–photo fermentation were employed to enhance the performance of H 2 production from starch feedstock. The starch feedstock was first hydrolyzed in sequencing batch reactor containing indigenous starch hydrolytic bacterium Caldimonas taiwanensis On1, producing reducing sugar at a yield and rate of 0.5 g reducing sugar/g starch and 1.17 g reducing sugar/h/L, respectively, under the optimal condition of pH 7.0, 55 °C and 1.0 vvm (air volume per reactor volume per minute) aeration rate. The hydrolyzed starch was continuously introduced to dark fermentation bioreactor, where the hydrolysate was converted to H 2 at a rate of 0.22 L/h/L by Clostridium butyricum CGS2 at pH 5.8–6.0, 37 °C and 12 h HRT. The resulting effluent from dark fermentation became the influent of continuous photo H 2 production process inoculated with Rhodopseudomonas palustris WP3-5 under the condition of 35 °C, 100 W/m 2 irradiation, pH 7.0 and 48 h HRT. Combining enzymatic hydrolysis, dark fermentation and photo fermentation led to a marked improvement of overall H 2 yield (up to 16.1 mmol H 2 /g COD or 3.09 mol H 2 /mol glucose) and COD removal efficiency (ca. 54.3%), suggesting the potential of using the proposed integrated process for efficient and high-yield bioH 2 production from starch feedstock.

Fikret Kargi - One of the best experts on this subject based on the ideXlab platform.

  • Photo-fermentative hydrogen gas production from dark fermentation effluent of acid hydrolyzed wheat starch with periodic feeding
    International Journal of Hydrogen Energy, 2011
    Co-Authors: Rana Sagnak, Fikret Kargi
    Abstract:

    Abstract Hydrogen gas production by Photo-Fermentation of dark fermentation effluent of acid hydrolyzed wheat starch was investigated at different hydraulic residence times (HRT = 1–10 days). Pure Rhodobacter sphaeroides (NRRL B-1727) culture was used in continuous Photo-Fermentation by periodic feeding and effluent removal. The highest daily hydrogen gas production (85 ml d −1 ) was obtained at HRT = 4 days (96 h) while the highest hydrogen yield (1200 ml H 2  g −1 TVFA) was realized at HRT = 196 h. Specific and volumetric hydrogen formation rates were also the highest at HRT = 96 h. Steady-state biomass concentrations and biomass yields increased with increasing HRT. TVFA loading rates of 0.32 g L −1  d −1 and 0.51 g L −1  d −1 resulted in the highest hydrogen yield and formation rate, respectively. Hydrogen gas yield obtained in this study compares favorably with the relevant literature reports probably due to operation by periodic feeding and effluent removal.

  • Bio-hydrogen production by different operational modes of dark and Photo-Fermentation: An overview
    International Journal of Hydrogen Energy, 2011
    Co-Authors: Hidayet Argun, Fikret Kargi
    Abstract:

    Abstract This article overviews reported studies on bio-hydrogen production from different raw materials by dark and Photo-Fermentations operated with different modes. Sequential and combined dark and Photo-Fermentations operated in batch, continuous and fed-batch modes were compared. Operating conditions and modes resulting in the highest hydrogen yield and formation rate were revealed. Relative advantages of sequential and combined dark and Photo-Fermentations were discussed. Sequential fermentation was found to be preferable due to high H2 yields and productivities. High cell density fed-batch culture with controlled feeding and simultaneous product removal was concluded to be the most suitable operation mode at the optimum environmental conditions.

  • effects of light source intensity and lighting regime on bio hydrogen production from ground wheat starch by combined dark and photo fermentations
    International Journal of Hydrogen Energy, 2010
    Co-Authors: Hidayet Argun, Fikret Kargi
    Abstract:

    Abstract Combined dark and Photo-Fermentation of ground wheat starch was carried out by using different light sources, intensities and lighting regime. A mixture of heat treated anaerobic sludge and Rhodobacter sphaeroides -RV with a certain light/dark bacteria ratio was used in batch experiments. Tungsten, fluorescent, infrared (IR), tungsten + infrared, halogen lamps were used as light sources with a light intensity of 270 Wm −2 along with sunlight. Halogen lamp was found to be the most suitable light source yielding the highest cumulative hydrogen formation (178 ml) and yield (218 ml g −1 starch). Combined fermentations were performed at different light intensities (1–10 klux) using the halogen lamp in the second set of experiments. The optimum light intensity was found to be 10 klux (approx. 352 Wm −2 ) resulting in the highest cumulative hydrogen (111 ml) and hydrogen yield (139 ml H 2  g −1 starch). Hydrogen formation was limited by the availability of light at low light intensities below 10 klux. Durations of dark/light cycles were changed to determine the most suitable lighting regime. Hydrogen gas formation increased with increasing cycle time and continuous lighting resulted in the highest cumulative hydrogen formation and hydrogen yield.

  • Effects of starch loading rate on performance of combined fed-batch fermentation of ground wheat for bio-hydrogen production
    International Journal of Hydrogen Energy, 2010
    Co-Authors: Serpil Ozmihci, Fikret Kargi
    Abstract:

    Abstract Ground wheat powder solution (10 g L −1 ) was subjected to combined dark and light fermentations for bio-hydrogen production by fed-batch operation. A mixture of heat treated anaerobic sludge (AN) and Rhodobacter sphaeroides -NRRL (RS-NRRL) were used as the mixed culture of dark and light fermentation bacteria with an initial dark/light biomass ratio of 1/2. Effects of wheat starch loading rate on the rate and yield of bio-hydrogen formation were investigated. The highest cumulative hydrogen formation (CHF = 3460 ml), hydrogen yield (201 ml H 2  g −1 starch) and formation rate (18.1 ml h −1 ) were obtained with a starch loading rate of 80.4 mg S h −1 . Complete starch hydrolysis and glucose fermentation were achieved within 96 h of fed-batch operation producing volatile fatty acids (VFA) and H 2 . Fermentation of VFAs by Photo-Fermentation for bio-hydrogen production was most effective at starch loading rate of 80.4 mg S h −1 . Hydrogen formation by combined fermentation took place by a fast dark fermentation followed by a rather slow light fermentation after a lag period.