BIOLOGICAL EVALUATION OF SOME DOMESTIC WASTEWATER TREATED WITH COAGULANT AND FLOCCULENT USING WHITE NEW ZEALAND MALE RABBITS

A total of 18 domestic wastewater samples were taken from
three different domestic wastewater treatment plants (Helwan, Zenin,
and Gabal El Asfar) were treated using Coagulant (FeCl3) and
Flocculent (polymer). Contaminants in domestic wastewater
[Suspended Solids (SS), Organic Matters (COD or BOD5), Nutrients
(TN+TP) and Heavy Metals] were classified into dissolved and
suspended.
From our previous work on the some wastewater, each domestic
wastewater sample was treated using six different chemical
treatments. Upon the chemicals analysis of the resultant water the best
treatment was chosen as drinking water for animals in this study
relative to tap water. All these contaminants were removed by
coagulation/sedimentation. Results of analysis of domestic wastewater
showed a great reduction after the chemicals treatment. Also, the
microbiological test against total Coliform and E. coli showed a great
reduction after treatment expressed as number of colonies per cubic
centimeter.
A total number of 64 white New Zealand male rabbits were used
to biologically examine the drinkability of the treated wastewater
without any adverse effects.
Hematological and biochemical relevant parameters of white
New Zealand male rabbits as affected by drinking wastewater treated
with coagulant (FeCl3) and flocculent (polymer) were in the normal
physiological range without no obvious change. No significant
BIOLOGICAL EVALUATION OF SOME DOMASTIC WASTEWATER
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changes in liver and kidney functions of the rabbits except a slight
elevation in blood plasma creatinine in the fourth group (Gabal El
Asfar treated wastewater). Weight gain, Feed conversion, and Feed
efficiency did not significantly change among experimental groups.
Slight increase in feed consumption in the rabbits drinking Gabal El
Asfar treated wastewater and slight decrease in feed consumption in
the rabbits drinking Helwan treated wastewater.
The study showed the drinkability of domestic wastewater
treated with the recommended doses (10-20 ppm FeCl3 + 5-15 ppm
cationic polymer + 5 ppm Cl2) of coagulant and flocculent in this
research without any adverse effects on rabbits.