SCI和EI收录∣中国化工学会会刊

›› 2008, Vol. 16 ›› Issue (1): 143-150.

• BIOTECHNOLOGY & BIOENGINEERING • Previous Articles     Next Articles

Start-up and Performance of a Novel Reactor——Jet Biogas In-ter-loop Anaerobic Fluidized Bed

DENG Zhiyi, WEI Chaohai, ZHOU Xiufeng   

  1. School of Environment Science and Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2007-07-10 Revised:2007-09-19 Online:2008-02-28 Published:2008-02-28
  • Supported by:
    the National Natural Science Foundation of China (No.50278036);the Natural Science Foundation of Guang-dong Province (No.04105951);the National High Technology Research and Development Program of China (No.2006AA06Z378)

Start-up and Performance of a Novel Reactor——Jet Biogas In-ter-loop Anaerobic Fluidized Bed

邓志毅, 韦朝海, 周秀峰   

  1. School of Environment Science and Engineering, South China University of Technology, Guangzhou 510640, China
  • 通讯作者: WEI Chaohai, E-mail: cechwei@scut.edu.cn
  • 基金资助:
    the National Natural Science Foundation of China (No.50278036);the Natural Science Foundation of Guang-dong Province (No.04105951);the National High Technology Research and Development Program of China (No.2006AA06Z378)

Abstract: A novel anaerobic reactor, jet biogas inter-loop anaerobic fluidized bed (JBILAFB), was designed and constructed. The start-up and performance of the reactor was investigated in the process of artificial glucose waste-water treatment. With the wastewater recycle ratio of 2.5:1, the recycled wastewater with biogas could mix sludge and wastewater in the JBILAFB reactor completely. The start-up of the JBILAFB reactor could be completed in less than 70 d through maintenance of hydraulic retention time (HRT) and stepwise increase of feed total organic carbon (TOC) concentration. After the start-up, with the volumetric TOC loadings of 14.3 kg·m-3·d-1, the TOC removal ratio, the effluent pH, and the volatile fatty acids (VFA)/alkalinity of the JBILAFB reactor were more than 80%, close to 7.0 and less than 0.4, respectively. Moreover, CH4 was produced at more than 70% of the theoretical value. The reactor exhibited high stability under the condition of high volumetric TOC loading. Sludge granules in the JBI-LAFB reactor were developed during the start-up and their sizes were enlarged with the stepwise increase of volu-metric TOC loadings from 0.8 kg·m-3·d-1 to 14.3 kg·m-3·d-1. Granules, an offwhite color and a similar spherical shape, were mainly comprised of global-like bacteria. These had good methanogenic activity and settleability, which were formed probably through adhesion of the bacteria. Some inorganic metal compounds such as Fe, Ca, Mg, Al, etc. were advantageous to the formation of the granules.

Key words: anaerobic reactor, jet biogas inter-loop anaerobic fluidized bed, wastewater treatment, start-up, granule sludge

摘要: A novel anaerobic reactor, jet biogas inter-loop anaerobic fluidized bed (JBILAFB), was designed and constructed. The start-up and performance of the reactor was investigated in the process of artificial glucose waste-water treatment. With the wastewater recycle ratio of 2.5:1, the recycled wastewater with biogas could mix sludge and wastewater in the JBILAFB reactor completely. The start-up of the JBILAFB reactor could be completed in less than 70 d through maintenance of hydraulic retention time (HRT) and stepwise increase of feed total organic carbon (TOC) concentration. After the start-up, with the volumetric TOC loadings of 14.3 kg·m-3·d-1, the TOC removal ratio, the effluent pH, and the volatile fatty acids (VFA)/alkalinity of the JBILAFB reactor were more than 80%, close to 7.0 and less than 0.4, respectively. Moreover, CH4 was produced at more than 70% of the theoretical value. The reactor exhibited high stability under the condition of high volumetric TOC loading. Sludge granules in the JBI-LAFB reactor were developed during the start-up and their sizes were enlarged with the stepwise increase of volu-metric TOC loadings from 0.8 kg·m-3·d-1 to 14.3 kg·m-3·d-1. Granules, an offwhite color and a similar spherical shape, were mainly comprised of global-like bacteria. These had good methanogenic activity and settleability, which were formed probably through adhesion of the bacteria. Some inorganic metal compounds such as Fe, Ca, Mg, Al, etc. were advantageous to the formation of the granules.

关键词: anaerobic reactor, jet biogas inter-loop anaerobic fluidized bed, wastewater treatment, start-up, granule sludge