International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
Vol. 12, No. 2, 2015, pp. 479-488
Bioline Code: st15043
Full paper language: English
Document type: Research Article
Document available free of charge
International Journal of Environment Science and Technology, Vol. 12, No. 2, 2015, pp. 479-488
© Copyright 2015 - International Journal of Environment Science and Technology
Characteristics of subsurface wastewater infiltration systems fed with dissolved or particulate organic matter|
Pan, J. & Yun, L.
The influent type of organic matter (dissolved
or particulate) on the characteristics of two subsurface
wastewater infiltration systems (SWISs) was investigated.
One of the SWISs was fed with dissolved organic matter
(glucose, assumed to be readily biodegradable) and the
other with particulate organic matter (starch, assumed to be
slowly biodegradable). Results showed that both biofilm
growth and particle accumulation in substrate could reduce
the effective porosity and infiltration rate of SWIS, especially
for the high organic matter concentration wastewater.
The reduction in effective porosity and infiltration rate
was primarily caused by organic particle accumulation.
The contribution of the accumulated organic particle to the
process of clogging was greater than that of biofilm growth
and the clogging mainly occurred in the upper layer in
starch-fed systems. The SWISs fed with glucose were not
clogged till the end of experiments. The hydraulic retention
time (HRT) increased with time in start-up period and was
almost invariable after mature in glucose-fed systems; in
starch-fed systems, clogging of substrate prolonged the
HRT. The two identical experimental SWISs were almost
equal efficiencies for the removal of chemical oxygen
demand (COD). The removal efficiencies of COD were not
influenced by clogging under the experimental conditions.
Ammonia N removal efficiency was higher in glucose-fed
systems than that in starch-fed systems.
Subsurface wastewater infiltration system; Glucose; Starch; Hydraulic retention time; Clogging
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