Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (5): 26-32.

• Biological Engineering • Previous Articles     Next Articles

Enhancement of Anaerobic Granulation for Sludge by Continuously Adding Bioflocculan

Wang Jing-song  Hu Yong-you†  Wu Chun-de   

  1. College of Environmental Science and Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2004-11-01 Online:2006-05-25 Published:2006-05-25
  • Contact: Hu Yong—you,professor,Ph．D．tutor．E-mail：ppyyhu@ scut．edu．cn E-mail:xhwjs@163.com
  • About author:Wang Jing-song(born in 1972)，male，Ph．D．，now works at School of Architectural Engineering，Re—sources and Environment，Nanhua Univ．,mainly researches on wastewater treatment technology
  • Supported by:

    Supported by the National Natural Science Foundation of China(50378039)

PDF

421

Abstract:

Upflow anaerobic sludge blanket(UASB)reactors were operated at(35±1)℃ for 102 days to re-veal the effect of bioflocculant on the anaerobic granulation of sludge during the treatment of low-strength wastewater.The results indicate that the addition of bioflocculant or cationic polyacrylamide(PAM)markedly accelerates the anaerobic granulation,that Reactor 1(R1)with the addition of bioflocculant is of all organic loading rate(OLR)of 3.8g/(L·d)(calculated as the loading of COD on the reactor per liter per day)in 43 days,while Reactor 2(R2)with the addition of cationic PAM and the control reactor 3(R3)reach the same value respectively in 44 and 98 days,that the granules developed in R1 exhibit better settleability and methano.genic activity than those in R2,and that the COD removal efficiencies of R1，,R2 and R3 respectively reach 94.5% ,91.7% and 84.0% when the experiments have been finished.

Key words: bioflocculant, granulation, sludge, upflow anaerobic sludge blanket