معالجة مطروحات مياه فضلات الصرف الصحي لمدينة تكريت باستخدام تقنية المجففات الحرارية الدواره واعادة استخدامها كاسمدة عضوية == Treatment of Domestic Wastewater Effluent of Tikrit City Using Thermal Rotating Dryer Technique And Reuse As Organic Fertilizers
Author name:
هالة ارشد علي حسين
Supervisor name:
جهاد ذياب محل الجنابي
General topic:
Biology
Specific topic:
Environment - Environmental pollution
Degree:
Doctorate
University:
Tikrit University - Faculty Of Education - Department Of Biology
Language:
Arabic
University location:
Salahaddin
First pages:
24T2763 - p.pdf
Abstract:
اجريت الدراسة في مختبرات كليتي التربية والعلوم - جامعة تكريت للفترة من نيسان 2010 لغاية شباط 2011 تتضمن الدراسة معالجة الحماة الناتجة عن حوض التجميع الابتدائي باستخدام تقنية المجففات الحرارية الدوارة للعمل على ازاحة ماء الحماة والتي تمثل اصعب العمليات الت | This study was conducted at a period from April 2010 to February 2011, to treat the sludge produced from collection tank at tikrit domestic wastewater plant, using thermal rotating dryer technique(T.R.D) or dewatering the sludge.This process represents one of the difficult applied process for the sludge treatment. This technique considered a modern technique in this field.Physical, chemical and biological characteristics of the manufactured sludge were determined and compared with organic fertilizers (I.O.F) imported from republic of Estonia (Available in local markets).T.R.D technique induced dewatering of the treated sludge at ratio48.5 - 61.5% and producing highly sterilized organic fertilizers which was free of pathogenic organisms(bacteria, worms and eggs) with high chemical characteristics comparing with those imported from Estonia. Manufactured organic fertilizers M.O.Fs have allow acidity pH ranged between 7.5 - 7.7 ,. electrical conductivity at range 1630 - 1873, organic matter at ratio 4.56 - 5.35%, with a moderate concentrations of Pb, Cd, Zn.The concentration of N and K was 1.8, 5.96% respectively while the concentration of phosphorus are 350 ppm. Three levels of M.O.Fs were used for corn plants(5, 10 and 20ton/acres). Results showed that all these levels significantly induced increasing for some physiological and morphological characteristics of corn plants compared with those treated by I.O.Fs or control plants. The vegetative dry weight of corn plants fertilized by M.O.Fs were 23.95gm/plant compared with 16.3 and 5.3 gm/plant for plants fertilized by I.O.Fs and control respectively. (M.O.Fs) induced significant increase in nitrogen concentration compared with plants fertilized by I.O.F and control while the concentrations of Pb, Cd, Zn were not affected by using of M.O.Fs on the other hand Pseudomonas aeruginosa and Escherichia coli were contributed in reducing and removing some of pollutants from the sludge at three incubation periods (30, 60 and 90 day). These two species caused significant decrease in pH and EC of the sludge, P. aeruginosas showed the highest removing ratio of nitrogen (93.1%). The cooperation of the two species caused high removing ratio for the Total organic carbon(87.72%) at 60 days and organic materials (90.68%) at 90 days of incubation also showed high removing ratio for phosphors 100%) at 90 days of in cubation.) These two species also caused high removing ratio for pb, Cd and Zn at30 days and P. aeruginosa was more effective in removing Pb, Cd and Zn from the sludge then E. coli.
