EIA Study- Final Report-May 10 - UNDP

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Environmental Impact Assessment Khan Younis Wastewater Treatment Plant May 2010 4. Description of the Project and its Alternatives This chapter is prepared based on the Initial Design Report which prepared by the Consultant, summarizing the important aspects for developing the EIA study. 4.1. Project Concept Water resources are very limited in the Gaza Strip and they form a critical factor for the development of human life and the agricultural sector in the area. On one hand, the treatment of wastewater is necessary for the protection of ground water resources and, on the other hand, the reuse of treated effluent will increase the quantity of water available for irrigation. The main disposal for the final effluent of the reclaimed wastewater is aquifer recharge and reuse to irrigate the agricultural areas. Sludge is recommended to be used as soil conditioner. The Gaza Wastewater and Drainage Master Plan proposes 3 central wastewater treatment plants (KY WWTP) in the Gaza Strip, all to be located within the agricultural areas close to the eastern borders of the Gaza Strip. An activated sludge process with extended aeration will be the process for each plant enabling nitrogen removal. The southern KY WWTP will serve the Governorate of Khan Younis. Figure 4.1 provides a general layout of these components in relation to the location in Khan Younis Governorate and Gaza Strip. Figure 4.1: General layout of KYKY WWTP SOGREAH/UG CONSULTANTS 34
Environmental Impact Assessment Khan Younis Wastewater Treatment Plant May 2010 KY WWTP project contains the following components: 1. Review the design of pump station 8 and its main pressure line to the treatment plant, 2. Wastewater treatment plant, 3. The infiltration basins, and 4. The pressure effluent and emergency line from the KY WWTP site to the infiltration basin and finally to the sea. 4.2. Khan Younis Wastewater Treatment Plant (KY WWTP) 4.2.1. Background and Previous Considerations At present, nearly 60% of the population of Khan Younis city is temporarily served by the new established public sewerage collection system. But due to the absence of wastewater treatment plant, the collected wastewater is pumped to the existing main storm water box culvert, which in turn flows by gravity to a storm water infiltration pond located in the northwestern side of Khan Younis city. The municipal wastewater strategic development plan aims at constructing an extendable and phased sewage system in line with the available resources. Although the strategic plan of the project is to design and construct an extendable KY WWTP with effluent capacity for the year 2025, the first phase of KY WWTP will be executed based on 2018 estimated capacity. The city of Khan Younis is divided into two catchment's zones, where the collected wastewater is drained by gravity to two main pumping stations (PS # 2 & PS # 3) located in the lowest points of the city center. Through pressure and conveyance pipelines, the effluent of these two pumping stations is raised to the main pumping station (PS # 8) located in the eastern part of the city. From Pumping Station # 8, the collected wastewater of Khan Younis city will be pumped to the proposed KY WWTP located in the eastern part of the Khan Younis Governorate. The proposed site of the KY WWTP is located south-east of Khan Younis city. The closest point of the permanent eastern site of KY WWTP is located far by around4 50 m from the eastern borders of the Gaza Strip in one of the sites’ corners, and by 750m in the other sites eastern corner. Khan Younis municipality owns the site of the KY WWTP. The available area for the proposed KY WWTP is 116 dunums (11.6 hectares). The shape of the site is long and narrow (670 meters X 170 meters). The major result of the design layout is that the planned facilities for Phase 1 and Phase 2 of the KY WWTP can be located within the available site area. (Figure 4.2) SOGREAH/UG CONSULTANTS 35
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EIA Study- Final Report-May 10 - UNDP

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