Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (10): 145-149.

• Environment Science & Technology • Previous Articles     Next Articles

Investigation into Start-Up of Integrated Two-Phase Anaerobic Reactor Treating Piggery Wastewater

Pu Yue-wu1  Guo Mei-jun1  Liu Zu-an2   

  1. 1.School of Biological Science and Engineering, South China University of Technology, Gnangzhou 510006, Guangdong, China; 2. Wuming Anning Starch Limited Company, Wuming 530100, Guangxi, China
  • Received:2008-08-02 Revised:2008-10-30 Online:2009-10-25 Published:2009-10-25
  • Contact: 浦跃武（1964-），男，副教授，博士．主要从事发酵工程研究． E-mail:g96123@scut．edu．cn.
  • About author:浦跃武（1964-），男，副教授，博士．主要从事发酵工程研究．
  • Supported by:

    广西科学研究与技术开发计划项目（4-2-3）

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Abstract:

An integrated two-phase anaerobic reactor was designed to treat piggery wastewater, and the corresponding start-up process was investigated. In this investigation, the volumetric loading rate （VLR） of the system was raised by alternately increasing the influent COD （ Chemical Oxygen Demand） concentration and decreasing the hydraulic retention time （HRT） at 37℃. Moreover, acidogenic and methanogenic phases were separated by controlling the VLR in combination with adjusting the pH value of the influent. The results show that （ 1 ） after a 68-day operation, a COD removal of 20. 00% - 301 00% in the acidogenic phase and a COD removal of more than 80. 00% in the whole system are respectively achieved at a VLR of 8.84kg/（m3· d） and a HRT of 20.95h; （2） the acidogenic phase is operated up to a VLR of 31.11 kg/（ m3·d） with a HRT of 5.95 h whereas the methanogenic phase is loaded up to a VLR of 9.39 kg/（ m3 ·d） with a HRT of 15 h ; （ 3 ） the suspended solid （SS） in the effluent is of a content of less than 400 mg/L and a highest removal up to 92.80% ; and （4） the volumetric produc- tion rate of biogas reaches 2. 57m3/（ m3· d）.

Key words: piggery wastewater, integrated two-phase anaerobic reactor, start-up process