نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه صنعتی نوشیروانی بابل
2 دانشیار دانشگاه صنعتی نوشیروانی بابل
3 دانشیار گروه محیط زیست، دانشکده عمران، دانشگاه صنعتی نوشیروانی، بابل، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Microalgae have the potential to produce valuable substances for pharmaceutical purposes, as well as serve as a food source, providing bioactive compounds and ingredients for cosmetics. However, harvesting microalgae is a crucial step in the mass production of various high-value products derived from microalgae. This process often becomes a major bottleneck in downstream processing. It is essential to find effective and cost-effective harvesting methods in industrial applications. Among several harvesting methods, magnetic flocculation offers the benefits of modest operation, energy savings and quick separation. This study investigates the harvesting process of Chlorella sorokiniana pa.91 microalgae using a novel flocculation process involving nano-Fe3O4 coated with PACl. In this research, we have used the chemical co-precipitation method to prepare nanoparticles. Using the response surface method to optimize the most important parameters of the magnetic flocculation harvesting process to check the microalgae removal efficiency, three variables of time, concentration of nanomaterials and pH in the culture medium obtained from municipal wastewater have been investigated. The results demonstrated that the highest harvesting efficiency, nearly 90%, was achieved under the conditions of 3.5 g/L Fe3O4, a constant concentration of 0.075 g/L PACl, a harvesting duration of 40 minutes, and a pH level of 4. on the other hand, the lowest microalgae harvesting efficiency was observed under specific conditions: with a composite nanoparticle concentration of 0.5 g/L per liter, a harvesting time of 27.5 minutes, and a pH of 6.5, resulting in a mere 22% efficiency.
کلیدواژهها [English]
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