چكيده به لاتين
Due to the water crisis in the world, especially in our country Iran, the addition of new and unconventional sources of water supply to reduce the use of existing water resources seems necessary. Separation of domestic wastewater into two parts, gray water and black water, has become common in developing countries. Reuse of gray water as a non-metallic source of water, in addition to reducing the use of existing water resources, also significantly reduces wastewater discharged into the environment. The main issue in the design of this complex is the limitation of fresh water resources in many countries. Which has become a serious problem. Increasing population, the need for more food, the need to improve health and social welfare and industrial development, has increased the demand for water day by day. Imbalance between water supply and demand, limited water resources, improper disposal of domestic wastewater and industrial effluents and high water loss in the agricultural sector are among the other water problems in the country. The United Nations has said in a report that water scarcity is a serious crisis in the coming years, and that public access to water will be reduced by a third. Therefore, the use of treated wastewater can mitigate the water crisis in this sector. For this purpose, one of the deprived areas of Tehran, in the Firoozabad area of Rey city, on the Tehran-Varamin road, which ironically has agricultural potential, has been selected so that in addition to being in line with the agricultural tourism approach, it can also earn money for the people of the region. The furnace bridge of Rey city is located in the middle of Tehran-Varamin road, the sub-exit of gas station 188. The selected site is part of the city of Rey, which is accessible via a side road on the main Tehran-Varamin highway next to the military gas station at station 181. Varamin road is accessible from Tehran through Imam Ali highway and Shahid Avini highway.
In order to build a purification system to adapt gray water and its entry into the home system, laboratory and experimental methods are used, the efficiency of which is measured by trial and error. In order to evaluate the feasibility of forming a water research and training center, the necessary information was collected from people referring to the area and employees in the kilns and surrounding neighborhoods through questionnaires and interviews, and then analyzed its content in order to Provide appropriate solutions by prioritizing the potential of the region, the necessary information has been collected. Therefore, the present study aims to investigate the usability of the region's wastewater according to its quality for various household uses and to select the most optimal use option in this region. Daily sampling of raw sewage and effluent of 8 residential houses with different populations in each family was performed randomly for seven days. After measuring the parameters, the quality of treated wastewater in the laboratory of Tehran Wastewater Treatment Plant is compared with the reuse standards provided by the Environmental Protection Organization and the World Health Organization (WHO) and the potential of using the wastewater of this treatment plant is determined. Wastewater was measured using the methods available in the ASTM method standard and parameters such as temperature and pH were measured by relevant devices in the laboratory. The gray wastewater recycling system should be designed in such a way that it can be easily and cost-effectively operated in terms of initial capital, and the water from it should have the necessary quality to irrigate the green space of the house and use it in the toilet siphon. This system is designed to treat about 200 liters of gray wastewater in a treatment cycle. Also, the system of converting human waste into biogas and converting it into electricity, by creating free energy, reduces production costs. The treatment system including gray sewage inlet in the primary tank, gray sewage after passing through the filter and gray sewage after disinfection in the final storage tank were tested.
To analyze the questionnaire data, hierarchical analysis method is used to identify and prioritize design goals and criteria using SPSS software, and according to the importance coefficients obtained from each factor, design factors will be prioritized. Qualitative analysis of effluent samples of residential units tested, laboratory-obtained parameters (mean with standard deviation of parameter concentration) using SPSS software are compared with the parameters of the World Health Organization, also to draw standard curves related to Each parameter used Excel program.
