Biological hydrogen production in a UASB reactor with granules. I: Physicochemical characteristics of hydrogen-producing granules

Biotechnology and Bioengineering
Yang Mu, Hanqing Yu

Abstract

Hydrogen-producing granules with an excellent settling ability were cultivated in an upflow anaerobic sludge blanket reactor treating a sucrose-rich synthetic wastewater. The physicochemical characteristics of granules were evaluated in this study. The mature granules had a diameter ranging from 1.0 to 3.5 mm and an average density of 1.036 +/- 0.005 g/mL, whereas they had good settling ability and a high settling velocity of 32-75 m/h. The low ratio of proteins/carbohydrates for the extracellular polymeric substances (EPS) in the granules suggests that carbohydrates rather than proteins, might play a more important role in the formation of the H(2)-producing granules. The contact angle of the mature granules, 54 +/- 2 degrees , was larger than that of the seed sludge (38 +/- 2 degrees ), indicating that the microbial cells in the H(2)-producing granules had higher hydrophobicity. The granules had fractal nature with a fractal dimension of 1.78. Their porosities were in the range of 0-0.70, and increased with increasing granule size. The ratios between the observed and predicted settling velocities by Stokes' law were in a range of 1.00-1.50, and the fluid collection efficiency of the granules ranged from 0 to 0.19, indicating ...Continue Reading

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Citations

Aug 19, 2007·Applied Microbiology and Biotechnology·Bing-Jie Ni, Han-Qing Yu
May 30, 2013·Environmental Science and Pollution Research International·J C CostaE C Ferreira
Dec 10, 2013·Bioprocess and Biosystems Engineering·Agnieszka Cydzik-KwiatkowskaIrena Wojnowska-Baryła
Apr 15, 2011·Bioresource Technology·Kyung-Won JungHang-Sik Shin
Apr 8, 2011·Bioresource Technology·Wen-Wei Li, Han-Qing Yu
Aug 31, 2010·Water Research·Chong-Jian TangJian-Wei Chen
Aug 4, 2009·Water Research·Ting-Ting RenHan-Qing Yu
May 26, 2009·Biotechnology Advances·Xian-Wei LiuHan-Qing Yu
May 1, 2015·Biotechnology and Bioengineering·Dong-Hoon KimMi-Sun Kim
May 23, 2008·Biotechnology and Bioengineering·Zhen-Peng ZhangAy Su
Jul 7, 2007·Biotechnology and Bioengineering·Bing-Jie Ni, Han-Qing Yu
Aug 12, 2010·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Alessandro SpagniRoberto Farina
Sep 25, 2019·Journal of Environmental Management·Marie Christine Amie Sene FayeYanrong Zhang
Dec 7, 2021·Biotechnology Advances·Jianlong Wang, Yanan Yin
Jul 12, 2019··Suhail Ahmed SoomroAbdul Sattar Jatoi

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