الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Iraq suffers from shortage in water resources due to the increase of population and the extension of agriculture lands and the studies have shown that the deficit will reach 73% in 2025. The main water resources in Iraq is the Euphrates and Tigris rivers, which provide more than 98% of Iraq’s water demands for the various purposes. Since 1970, Syria and Turkey began building dams on the Tigris and Euphrates Rivers, causing reduction in the flow of rivers into Iraq. Such a problem may be overcomed by increasing non-conventional water resources such as reuse of treated wastewater in irrigation. The treated wastewater is preferred to be used in agriculture, where is used 75% of water consumption. Therefore, the current study focuses on safe reuse of treated wastewater in agriculture to cover the shortage water resources in Iraq. In order to reach the safe reuse of treated wastewater, standard and guidelines must be established to minimize adverse effects. In light of the current circumstances and the shortage of water resources, it is necessary to establish a code for the reuse of treated wastewater in Iraq. A comparison of international standards might help to develop guidelines for Iraq. In order to achieve the safe use of treated wastewater, there must be adequate laws and legislation. A case study of the Russtmiya wastewater treatment plant in Baghdad which suffer from over load in 2020. has to be chosen according to the guidelines and laws for future using in the cultivation of crops with an economic return. The first step is done to design the WWTP using three alternatives; complete mix activated sludge carbon removal (CAS); attach growth membrane bioreactor (MBR) process and; complete mix (aerated lagoon). GPS-X program is used to check the design and extract some input data from influent advisor to capdetwork (v.4) program. Moreover, the cost analysis of three alternatives is estimated to choose the most suitable and economic design for the plant. The obtained results from cost analyzes for three alternatives, revealed that the aerated lagoon system was the lowest current value and the unit cost per m3 . Economically, the aerated lagoon system is the most cost-effective in case of availability of cheap land . Finally, the effluent treated wastewater is use to irrigated many crop with an economic return that the government can benefit from it.