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Modeling and simulation of hybrid anaerobic/aerobic wastewater treatment system
Abou-Elela, S. I.; Hamdy, O. & El Monayeri, O.
Abstract
Modeling and simulation using GPS-X software
for a packed bed up-flow anaerobic sludge blanket
followed by a biological aerated filter were studied. Both
treatment units were packed with a non-woven polyester
fabric as a bio-bed. The system was operated at a hydraulic
and organic loading rate of 9.65 m3/m2/d and 2.64 kg
BOD5/m3/day. Verification of the experimental results and
calibration of the model were carried out prior simulation
and modeling. Variables under consideration were HLR,
OLR, and surface area of the packing material. HLR and
OLR are increased incrementally until the break through
point has been achieved. The results obtained from modeling
indicated that the treatment system has great potential
to be used as an ideal and efficient option for high
hydraulic and organic loading rates up to 19.29 m3/m2/d
and 4.48 kg BOD5/m3/day. The model indicated that
increasing the input HLR and OLR loads to the treatment
system up to 50 % of the original values achieved removal
efficiencies 98 % for TSS, 88 % for BOD5, and 85 % for
COD. Moreover, increasing the HLR to four times the
original value (38.59 m3/m2/d) reduced the efficiency of
the treatment system to 50 % for COD and BOD5. However,
the removal rates of TSS, TKN, and TP were not
affected. Also, the modeling results indicated that
increasing the surface area of the packing material
increased the overall efficiency of the treatment system.
Keywords
BAF; GPS-X software; Modeling; P-UASB; Packing material; Simulation
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