000			02927nam a22002657a 4500
999			_c59381 _d59381
008			180912s2014 ua a|||g bm|| 00| 0 eng d
040			_cSOUL
041			_aeng
082	0	4	_221 _a627 _bM A
100	1		_94647 _aMahmoud, Amina Abdel Azim
245	1	0	_aAssessment of Acidification Process in Alum recovery for Different Water Clarification Systems / _cAmina Abdel Azim Mahmoud Shaltout ; Supervised by Hesham Sayed AbdeHalim, Ehab Helmy Rozeik.
246	1	5	_aمقارنة بين تطبيق طريقة تحميض الروبة لإنتاج الشبة المعادة في انظمة المروقات المختلفة للمياه
260			_aCairo : _bCairo University _c2014.
300			_a166 p. : _bill. ; _c30 cm + _e1 CD.
500			_aThesis (Ph.D.) – Cairo University. Faculty of Engineering.
504			_aIncludes Bibliographical References.
520			_aCoagulation is critical process in drinking water treatment involving colloid charge neutralization followed by aggregation into floes that are amenable to solid/liquid separation with subsequent processes such as filtration. Most of water treatment plants use alum AI/SO 4)314-H2 0, as a coagulant due to its effectiveness in treating awide range of water type and relatively low cost. Alum sludge produced from water treatment plants contains aluminum hydroxide mixed with suspended solids in raw water. The aim of this research is to study aluminiumsulphate (alum) recovery from alum sludge in aqueous solution by acidification process using sulphuric acid, and compare the results of applying the acidification method to the alum sludge produced from different clarifier types. Bench scale tests were performed for alum sludge samples from three different water clarifier typesto evaluate the process. The results of the experimental works showed that the recovered alum volume produced from pulsator system after acidification process is the best value with percent recovery 98%, then the high rate system with percent recovery 96.4%, and the classical system with percent recovery 94%. All these percentage achieved at the liquid sludge. The concentration of recovered alum occurred by acidifying the sludge produced from classical clarifier, the high rate type and the pulsator type are 20.2%, 18.5% and 13.90% respectively. The recovered alum can reduce turbidity with percentage 84.2% in the classical clarifier type, 79.52% in the high rate clarifier type and 76.47 in the pulsator clarifier type. A mixture of recovered alum and fresh alum can also be used to improve the coagulation process.
546			_aText in English, Summaries in English and Arabic.
650	1	4	_94648 _aWater treatment plants
653			_aOrthodontic surgery.
700	1		_94649 _aRozeik, Ehab Helmy _eSupervisor
700	1		_94650 _aAbdeHalim, Hesham Sayed _eSupervisor
710	2		_aCairo University. _bFaculty of Engineering.
942			_2ddc _cTHE _iFOE _6FOE