الفهرس 
1.IntroductionOnly 14 pages are availabe for public view
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Abstract
1- English Summary
The M.Sc Thesis include four main chapter
I- Aim of the work
The work aimed to use the sponge in waste water
treatment in addition of heavy metal organic chelator
2,2’,2”,2’” –( ethane – 1,2 – diybis (aznaetriyl ))
tetaacetohydrazide.
II- Introduction
This chapter includes an overview of previous researches
for use down flow hanging sponge in wastewater
treatment and use of EDTA in heavy metals treatment
and their application.
III- Experimental
This chapter contains the chemical and machines used in
practical part of thesis as follow:
1)The physic-chemical method measuring such as pH,
temp., TDS,COD,BOD, TSS, ammonia, oil & grease
,fecal coilform , total coliform and their heavy metal.
2) Preparation of the EDTA ligand and its metal
Complexes.
Characterization of the ligand and its complexes
· Physical technique such as molar conductance
and magnetic Susceptibility.
· Spectral technique as IR, UV-Vis.
iv- Result and discussion
This chapter includes characterization of wastewater and use the sponge
in treated it and add the ligand to heavy metal treating where Down-flow
Sponge (DHS) system was module column consists of four identical
segments connected vertically, each segment will be equipped with 25 L
of polyurethane foam (PF) warped with plastic material randomly
distributed in the whole reactor and ligand was prepared as follow :
1)EDTA was boiled in ethanol for 1h add Five drops of Conc. H2SO4
were added, and reflux was contusions to 3h. 2) Hydrazine hydrate
sulfate was added. The solution was reflux with stirring for 3h. Cool to
room temperature. The physic-chemical measuring of raw wastewater,
primary Effluent, and final effluent of activated sludge plant and final
effluent of DHS and their heavy metal at the condition: A- At retention
time 6h. B- At retention time 3h.
C- Use DHS as tertiary treatment.
Metal complexes of 2,2’,2”,2’” –( ethane – 1,2 – diybis (aznaetriyl ))
tetaacetohydrazide ligand have been synthesized by element analysis IR,
UV-VIS spectra, magnetic moment and conductance . Evaluate the pH,
Temp., COD, BOD, TSS, ammonia, oil & grease and total coil formfeacal
coil form removal at different HRT’s in DHS system treating Grey
water. The aim of DHS system was achieved to produce a final effluent
quality suitable for safe reuse for restricted irrigation purposes and
without heavy metal.
Based on these results observed that,
A- At retention time 6h.
The experimental data showed that, 97% (190-5.0mg/l ) decrease in the
total suspended solid from the primary effluent, chemical oxygen demand
(COD ) 96.4% (230-7.0 mg O2 / l) , total biological oxygen demand
97.27% (180-4.0mg/l) and total Kjeldahl nitrogen (TKN) 80% (4 -0.8mg
N/l). Also the results showed, that the chelator remove iron and
manganese up to 94.8 % and 85.8 % when the concentrations of iron and
manganese ions were 0.472 and 0.75mg/lin primary effluent respectively.
B- At retention time 3h.
Experimental data showed that, 95.7% (190-8.0mg/l ) decrease in the
total suspended solid from the primary effluent, chemical oxygen demand
(COD ) 95% (220-9.0 mg O2 / l) , total biological oxygen demand 96%
(170-6.0mg/l) and total Kjeldahl nitrogen (TKN) 76% (4.3 -1.0mg N/l).
Also the results showed, that the chelator remove iron and manganese up
to 94.8 % and 85.8 % when the concentrations of iron and manganese
ions were 0.472 and 0.75 mg/l in primary effluent respectively.
C- Use DHS as tertiary treatment.
Experimental data showed that, 92 % (25-2.0 mg/l ) decrease in the total
suspended solid in the finial effluent of traditional activated sludge,
chemical oxygen demand (COD ) 89 % (30-3.2 mg O2 / l) , total
biological oxygen demand 89% (28-3mg/l) .
from the result in (A, B and C) found that the DHS system achieved
good result as post –treatment after primary settling and tertiary
treatment after the effluent of activated sludge plant. The chelating
achieved good result in heavy metals removal.