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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Karim Rashid Gubashi
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DOI:10.17265/2162-5298/2012.08.003
Affiliation(s)
ABSTRACT
Laboratory
scale model of DMMBF (dual mixed media biofilter)
were designed and installed in Al-Mustansiriya University Environmental
Hydraulic Lab. Experiments were conducted using two mixed layers through PVR
column—2.2 m height and 300 mm diameter. The first mixed media filter of depth
640mm mixed of sand, rice husk
and granular activated
carbon. The percentage volume mix is 1:1:1.
While the other mixed media
of depth 740 mm, consisting of coal, crash porcelinaite, rock and granite with
equally percentage volume.
Fifty samples were
collected during the experiments, which was spread over a period of forty two
weeks. The obtained results indicate that when the flow loading raised from
0.15 L/min to 2.7 L/min,
the removal efficiency of
BOD decreased 8%-11%, and the removal efficiency of
COD deceased 3%-4%, while the removal efficiency of turbidity
increased with the decreasing of hydraulic loading. The
results showed that the removal efficiency of turbidity is more than 95% at the
lower discharge (0.15 L/min). Therefore, infiltration should be conservatively
designed using low loading rates.
KEYWORDS
Hydraulic parameters, dual mixed media, greywater treatment, removal efficiency, turbidity, COD, BOD.
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