الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Syria and the rest of the Arab countries are confronted with water problem which IS becoming increasingly serious due to three factors: the demographic growth combined with extensive urbanization, the implementation of ambitious agricultural development projects requiring massive irrigation and finally the degradation of existing resources. For these reasons, the reuse of treated wastewater for irrigation become very important in Syria and the rest of the Arab countries.
Now Syria faces problems of both quality and quantity of water. No doubt Syria will face a future of increasing acute water scarcity. Water sharing issues between Syria and its all neighbors are either unresolved or partly resolved. Moreover municipal wastewater treatment is virtually nonexistent, with sewage dumped in to the sea in many Syrian shore cities. The principle objective of this study was to present and propose a comprehensive example of a wastewater treatment and reuse system in one of the Syrian cites. The principles of this example can be implement and followed in other cities.
A pilot plant study was used in order to simulate the conditions of wastewater in Syrian shore such as the variation of flow rate. The observation and results of the pilot plant and this study can be summarized as follows:
1. Increasing hydraulic retention times in aeration tank decreased the effluent suspended solids concentration.
2. Increasing hydraulic retention time in aeration tank decreased the COD and BOD effluent concentration.
3. Under hydraulic retention time conditions the final settler tank on soluble COD removal ranged from 40% at HRT = 4 hours to 14% at HRT =12 hours.
4. Activated sludge plant with complete- mix” in the Syrian shore is an attractive treatment option.
5. Treated wastewater for irrigation, must meet at least the ”(WHO, 1989) ”FAa” standards and satisfy the health regulations governing the types of crops such as olive trees, fruit trees, tobacco, and cotton that are irrigated in the Syrian shore
6. Drip irrigation in the Syrian shore is an attractive irrigation option.