Backwashing Sludge Utilization of Biological Aerated Filter (BAF)

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Abstract:

The characteristics of biological aerated filter (BAF) backwashing sludge and the combined coagulation efficiency of chemical coagulant and biological sludge, and the properties of the settled sludge produced in the utilization process were investigated. The results showed that the backwashing sludge had preferable biological flocculation ability. A promising treatment performance, which sufficed the influent requirement of BAF was observed whether by using the backwashing sludge or combined using chemical coagulant and biological sludge in the enhanced domestic wastewater pretreatment process. The removal efficiency of COD, SS and TP were up to 74.6%、81.9% and 84.2% respectively where as backwashing sludge dosage was 38~76mg and FeCl3 dosage was 30mg per liter domestic wastewater.

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Periodical:

Advanced Materials Research (Volumes 864-867)

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1763-1766

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December 2013

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] R. Pujol, M. Hamon, X Kandel: Biofilters: Flexible, reliable biological reactors. Wat. Sci. & Technol. Vol. 10~11(1994), p.33.

DOI: 10.2166/wst.1994.0742

Google Scholar

[2] R. Pujol: Process improvements for upflow submerged biofilters. Water21. Vol. 4(2000), p.25.

Google Scholar

[3] J. J. Chen, D. McCarty, D. Slack: Full scale studies of a simplified aerated filter (BAF) for organic and a nitrogen removal. Wat. Sci. & Technol. Vol. 4~5(2000), pp.1-4.

DOI: 10.2166/wst.2000.0417

Google Scholar

[4] L. P Qiu: Research on operational characteristics of biological aerated filter (BAF) for domestic wastewater treatment and it ecology. Doctoral paper, Harbin institute of technology. (2003).

Google Scholar

[5] J. Ma, L.P. Qiu: Biological aerobic filter and its research progress. Environmental Engineering (in Chinese). Vol. 3 (2002), p.7.

Google Scholar

[6] EPA of China. Water and wastewater analyzing methods(3rd edition). China Environmental Science Press: Beijing, (1989).

Google Scholar