Abstract Aquaculture operations produce high volumes of wastewater containing suspended solids and nutrients such as phosphorus and nitrogen. Treatment of water effluent from fish production ponds is essential for sustain environment. So, the present study was conducted to evaluate simultaneous use of microalgae and iron oxide nanoparticles (NPs) to purify aquaculture effluents within a designed bioreactor. For designing experiment, effluent samples were collected from fish farms in Sari, Iran. Iron oxide nanoparticles were prepared from Iranian Nano Pishgaman Company. Chlorella vulgaris was captured from the environment, then purified and cultured in the laboratory. After that, NP and microalgae were transferred to the reactor space. TSS (total suspended solid), TDS (total dissolved solid), BOD (biological oxygen demand), pH (power of hydrogen), EC (electrical conductivity), NO3 (nitrates), NO2 (nitrite), NH4, (ammonium) and PO4 (phosphates) were measured during the experiment period which NH4 (93.67 %), NO3 (92.23 %), NO2 (89.3 %), and PO4 (89.25 %) showed the highest reduction percentage, respectively. Also, significant differences among the calculated parameters (except for pH) were observed during the experiment (P

中文翻译：

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在设计的生物反应器中使用小球藻和氧化铁纳米颗粒净化水产养殖废水

摘要 水产养殖作业产生大量含有悬浮固体和营养物质（如磷和氮）的废水。养鱼池出水的处理对于维持环境至关重要。因此，本研究旨在评估在设计的生物反应器中同时使用微藻和氧化铁纳米颗粒 (NPs) 净化水产养殖废水。为了设计实验，从伊朗萨里的养鱼场收集流出物样品。氧化铁纳米颗粒是从伊朗 Nano Pishgaman 公司制备的。从环境中捕获普通小球藻，然后在实验室中进行纯化和培养。之后，NP和微藻被转移到反应器空间。TSS（总悬浮固体）、TDS（总溶解固体）、BOD（生物需氧量）、pH（氢功率）、在实验期间测量了 EC（电导率）、NO3（硝酸盐）、NO2（亚硝酸盐）、NH4（铵）和 PO4（磷酸盐），其中 NH4 (93.67 %)、NO3 (92.23 %)、NO2 (89.3 %)和 PO4 (89.25 %) 分别显示出最高的减少百分比。此外，在实验过程中观察到计算参数（pH 值除外）之间的显着差异（P