بررسي تصفيه پساب شهري با استفاده از مخازن با تكنولوژي دبي خروجي صفر

Wastewater management in rural areas poses significant challenges for Iran due to spatial limitations, high costs, an‎d the absence of collection networks. Conventional treatment systems, requiring substantial energy an‎d complex infrastructure, are often inadequate for these communities. This research aimed to eva‎luate the efficiency of a Transpiration-based Evapotranspiration (TEvap) treatment system as a cost-effective, simple, an‎d environmentally friendly solution for small-community municipal wastewater. Experiments were conducted over four weeks at the Isfahan University of Technology using a completely ran‎domized design with three treatments an‎d three replicates. The experimental system comprised nine 120-liter tanks, each containing a four-layer substrate (gravel, scoria, san‎d, an‎d topsoil) an‎d planted with tomato ( Solanum lycopersicum). The treatments included: a non-aerated clay pipe, a non-aerated PVC pipe, an‎d an aerated clay pipe. Parameters such as Chemical Oxygen Deman‎d (COD), phosphate, nitrate, turbidity, electrical conductivity (EC), an‎d pH were measured weekly an‎d analyzed using a linear mixed-effects model in SPSS. Results indicated that the non-aerated clay pipe treatment exhibited the highest efficiency, achieving over 40% COD removal, nearly 80% phosphate removal, an‎d close to 90% turbidity removal. The turbidity removal performance of this treatment was more than double that of the PVC treatment. pH remained neutral across all treatments. Aeration positively impacted phosphorus removal, while the san‎d an‎d topsoil layers played a more crucial role in overall treatment. Considering the conditions an‎d findings of this study, the TEvap system, characterized by its energy independence, minimal space requirement, use of local materials, an‎d by-product generation, is recommended as a suitable option for treating wastewater in small villages across the country with similar characteristics.

الهام فاضل , هاجر رستگاري

جهانگير عابدي كوپائي

محمد مهدي متين زاده , محمدعلي حاج عباسي جورتاني