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Received: 2004-08-13

Revision Accepted: 2004-11-10

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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.5 P.427-432


Biomass and microbial activity in a biofilter during backwashing

Author(s):  BAI Yu, ZHANG Jie, LI Yi-fan, GAO Yu-nan, LI Yong

Affiliation(s):  Beijing Drainage Group Limited Company, Beijing 100061, China; more

Corresponding email(s):   Baiyu75322@163.com

Key Words:  Biofilter, Backwashing, Biomass, Microbial activity, Oxygen demand

BAI Yu, ZHANG Jie, LI Yi-fan, GAO Yu-nan, LI Yong. Biomass and microbial activity in a biofilter during backwashing[J]. Journal of Zhejiang University Science B, 2005, 6(5): 427-432.

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journal="Journal of Zhejiang University Science B",
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%A LI Yi-fan
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%A LI Yong
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2005.B0427

T1 - Biomass and microbial activity in a biofilter during backwashing
A1 - BAI Yu
A1 - ZHANG Jie
A1 - LI Yi-fan
A1 - GAO Yu-nan
A1 - LI Yong
J0 - Journal of Zhejiang University Science B
VL - 6
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SP - 427
EP - 432
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Y1 - 2005
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2005.B0427

biomass and microbial activity in backwashing processes of a biofilter for tertiary treatment were investigated. The microbial groups revealed new distribution along the biofilter depth after low flow rate backwashing for a short time. Then the start-up process was accelerated by backwashing. The biomass profile and microbial activity profile both varying with depth before and after backwashing, can be mathematically described by quadratic equations. Using the profiles, the difference of oxygen demand can be calculated to determine the airflow rate during backwashing. Combined with the difference between biofilters and rapid gravity filters, analysis of biomass and microbial activity can determine more accurately the required airflow rate during backwashing.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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