Performance evaluation of two filter materials in intermittent sand filtration system

Year 2019, Volume: 2 Issue: 3, 125 - 129, 30.09.2019

Ganiyu Sodamade Ezechiel Longe Odum Odum

https://doi.org/10.35208/ert.497511

Abstract

The environment is a
treasure that needs to be protected from point and diffuse sources of pollution.
Most wastewater treatment plants cannot attain 100% efficiencies and this call
for tertiary treatment process before discharging final treated wastewater into
the environment. The study focused on harnessing the locally available
materials, sand and granulated Palm Kernel Shell (gPKS) as filters for
treatment of wastewater from constructed wetland using intermittent filtration
system in the laboratory. The filter depth and hydraulic loading rate was 650
mm and 0.135 L min^-1, respectively. Applied wastewater was effluent
from the Constructed Wetland (CW) of wastewater treatment plant University of
Lagos. The filtration system was dosed intermittently 6 hourly for 12 weeks.
Experimental results showed that pH of the effluent from gPKS filter medium was
slightly reduced to the influent due to acidic nature of the gPKS while
effluent from sand filter slightly increased. The five day biochemical oxygen
demand (BOD5) removal efficiency for the gPKS and sand filters were 59.2 and
69.08% respectively, while the corresponding average Dissolve Oxygen (DO) were
2.9 ± 0.6 mg L^-1 and 3.4 ± 0.345. The percentage removal of E. coli in sand and gPKS filters are
69.34% and 87.49% respectively.

Keywords

Wastewater treatment plant, granulated palm kernel shells, intermittent sand filtration, E. coli

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