סמינר מחלקה של אידריס סלדה: " שיפור איכות טיפול במי שפכים במדינות מתפתחות באמצעות נשאים מתכלים "
School of Mechanical Engineering Seminar
Wednesday March 15.03.2023 at 14:00
Wolfson Building of Mechanical Engineering, Room 206
Improvement of wastewater quality performance for irrigation in developing countries using degradable carriers
M.Sc. student of Prof. Hadas Mamane
One of the challenges in developing or low-income countries is wastewater polluting the water sources leading to environmental risk. Wastewater treatment methods are well practiced in developed countries, both centralized and decentralized. Still, adapting such a treatment is not feasible or easy in developing countries, especially in rural areas. One of the decentralized methods used in rural areas, especially in India for sewage treatment, is wastewater stabilization ponds, which is a short anaerobic treatment with a combination of algal activities where the effluent, in some cases, is used for agricultural irrigation. This has a high potential to cause a human health hazard and environmental pollution of the soil and groundwater. Untreated wastewater, in some cases, can be used to reduce fertilizer costs or, in other cases to address water shortage. This study is continuous lab based research for "an improved microalgae-bacterial biofilm for wastewater treatment without energy investment,” which studied the use of sponges as carriers of microalgae-bacterial biofilm in wastewater. The study showed improved wastewater quality using the sponges, by decreasing the COD and the nutrient removal from the wastewater. Although this method is not sustainable, the sponges are essentially made of plastic and can produce microplastics in the treated wastewater. The current research examines an alternative to the sponge using a similar protocol. The research had two phases. The first phase is the design of several potential carriers made of Polylactic acid; a biodegradable material produced from organic materials such as corn. Following the design, the carriers were printed and compared. In the second phase, the leading carrier was selected for further tested its efficiency on wastewater under anaerobic conditions for 7 days.
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