الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
stabilization ponds are used to treat a variety of waste water from domestic wastewater to complex industrial wastes, and they function under a wide range of weather conditions from tropical to arctic. Oxidation ponds are just beginning to be used by developing natiofis as an economical and efficient mean for treating wastewaters. The tremendous population increase in knman (Jordan) from.5O,OOO in 1940 to 800,000 in 1985 led to severe pollution problem to be managed/and containedo An immediate relief project was adopted by the government that involves the construction of a major single treatment plant ( Waste stabi lization ponds) at Khirbet Samrao Climatic conditions of Jordan are characterized by abundant sunshine throughout most months of the year, and by rainfall which generally is limited to winter monthso This type of.climate favors the use of stabilization ponds as a practical method for treatment and water reclamationo In addition to the above advantages, which make stabilization ponds an attractive treatment option on process selection for developing countries under most circumstances suitable treatment and very effective pathogen removal is obtained. Stabilizatio~ ponds can act as their own tertiary treatment, effecientto remove bacteria, reduce content of biodegradable organics and limit the combined phosphorus and nitrogen to be discharged to the recieving stream (4). The principal objectives studied in the thesis were: 1. Evaluation of the wastewater stabilization ponds performance. . 2. Study of the design parameters used in the system and their relation to the current operational conditions. The controlling factors to be considered in stabilization ponds perfo~ance evaluation should include the intensity of light, temperature, nitrogen, phosphorus, sulphur and carbon. The waste stabilization ponds at Khrebit Samra were designed to handle. loads projected for the year 2000. The system consists of: 4 Anaerobic ponds ( 2 per train). 12 Facultative Ponds ( 4 per train). 12 Maturation Ponds ( 4 per train). Samples sites were chosen to represent the effluent of each pond in the train~ Samples were collected once a week and. analysed according to the standard meth9ds of analysis. The following parameters were measured to evaluate the efficiency of the plant; solids’( T.S., D.S, S.S, V.S, V.SS.), pH, alkalinity D.O~, BOD, GOD, Chlorophyll” a” , Algae & Bacterial counto ~om the results, it was found that sunshine had affected the pond temperature and improved the performance during summer and autumn months where both temperature and light are at their maximumo The effluent water pH had inclined to the alkaline side which proves the co~rect relationship between algae and bacteria in the faculative pond~ Also effluent alkalinity values were higher than the influent ones which agreed with the results of pH. The ponds are designed to treat a flow of 68,000 mJ/day of domestic sewage with a BOD5 concentration of 530 mg/l the ponds at present are-recieving a higher organic and hydraulic loading, with a possibility of toxic industrial waste being discharged to it. The dissolved oxygen results showed an improvement in the performance of the ponds during summer and Autumn where ’values’ of 0 mg/l were recorded in the maturation ponds instead of I mg/l in the 1st half of the year~, The efficiency of the plant for removing BOD, COD, TSS, NH4 and faecal coliform from the waste water was found to be 80-9~~ but the residual values were higher than the design criteria of the plant. Algae was found in facultative ~~d maturation ponds. Chlamydomonas, huglena, Fhacus and Chlor~lla were the predominant species~ Some other types of ~lgae were found in different seasons and different ponds. Nematodes worms and eggs were not present in the effluent watero It was found also that the detention times of the different ponds were lower than the designed one, which affect the performance of the planto But it was noticed that there was 2-3