Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Variation of Activation of Inactivated Granular Microorganisms in the UASB Process

UASB 공정에서 불활성화된 입상미생물의 활성변화

  • LEE Heon-Mo (Department of Environmental Engineering National Fisheries University of Pusan) ;
  • YANG Byung-Soo (Department of Environmental Engineering National Fisheries University of Pusan)
  • 이헌모 (부산수산대학교 환경공학과) ;
  • 양병수 (부산수산대학교 환경공학과)
  • Published : 1994.01.01
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Abstract

The recovery posibility of granular sludge inactivated due to high organic loading at stawrt-up stage of UASB reactors was examined at various storage periods while kept at a constant temperature of $35^{\circ}C$. It was noticed that the inactivated sludge kept without feeding recovered microbial activity much faster than that kept with continuous feeding. The activity of the sludge gradually recovered to the point where the organic removal rate of 0.15g of 0.15g COD/g VSS-day at the inactivated stage had changed to 0.36g COD/g VSS-day after 60 days of storage without feeding, which was similar to the active granular sludge activity of 0.38g COD/g VSS-day. There was no significant different in the characteristics of activity recovery between granular sludge and smashed sludge.

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