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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 13, No. 3, 2016, pp. 825-834
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Bioline Code: st16078
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 13, No. 3, 2016, pp. 825-834
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Development of attapulgite composite ceramsite/quartz sand double-layer biofilter for micropolluted drinking source water purification
Wang, Z.; Zhong, M. G.; Wan, J. F.; Xu, G. J. & Liu, Y.
Abstract
This study compared start-up and steady-state
affecting factors of attapulgite composite ceramsite/quartz
sand double-layer biofilter (ACC/QSDLBF) and quartz
sand single-layer biofilter (QSSLBF) on micropolluted
drinking source water treatment. Results showed that the
ACC has suitable pore size distribution in the range of
5–850 nm which is conducive to biofiltration. Turbidity
removal efficiency of ACC/QSDLBF was a little lower
than QSSLBF, but organic matters and ammonia removal
efficiencies of ACC/QSDLBF were much higher than
QSSLBF due to biodegradation and nitrification by
microorganisms colonizing on the ACC. At stable state, the
growth of head loss for ACC/QSDLBF was lower than that
of QSSLBF. The complete filtration cycle of ACC/
QSDLBF was 52 h. The total CODMn removal rate of
ACC/QSDLBF was 20.93 %, in which 90 % of removed
total CODMn was achieved at the upper 60 cm of ACC
filter layer. The removal of CODMn decreased from 35.89
to 13.16 % in ACC/QSDLBF when increasing hydraulic
loading from 2 to 16 m/h. After analysis of efficient EBCT
in ACC/QSDLBF, optimized hydraulic loading was 12 m/
h. These conclusions would be helpful to practical application
of ACC as functional material for new construction
of waterworks, especially upgrading of existing waterworks
treating micropolluted drinking source water.
Keywords
Attapulgite composite ceramsite; ACC/ QSDLBF; Biofiltration; Start-up; Affecting factors; Efficient EBCT (EEBCT)
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