Swine wastewater is rich in nitrogen and organic carbon which are essential macronutrients for microalgal growth. Three indigenous microalgal strains (Chlorella sorokiniana AK-1, Chlorella sorokiniana MS-C1, and Chlorella sorokiniana TJ5) were examined for their growth capability in untreated swine wastewater. C. sorokiniana AK-1 showed the best tolerance towards swine wastewater, and obtained the highest biomass concentration (5.45 g/L) and protein productivity (0.27 g/L/d) when grown in 50% strength swine wastewater. Cell immobilization using sponge as the solid carrier further enhanced maximal biomass concentration and protein productivity to 8.08 g/L and 0.272 g/L/d, respectively. Reuse of microalgae loaded sponge resulted in an average biomass production and protein productivity of 6.51 g/L and 0.15 g/L/d, respectively. The COD, TN and TP removal efficiency for the swine wastewater was 90.1, 97.0 and 92.8%, respectively. This innovative swine wastewater treatment method has demonstrated excellent performance on simultaneous swine wastewater treatment and protein-rich microalgal biomass production.

中文翻译：

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用猪废水培养小球藻AK-1，以同时进行废水处理和藻类生物质生产。

猪废水富含氮和有机碳，这是微藻生长必不可少的大量营养素。检查了三种本地微藻菌株（Chorella sorokiniana AK-1，Chlorella sorokiniana MS-C1和Chlorella sorokiniana TJ5）在未经处理的猪废水中的生长能力。C. sorokiniana AK-1对猪废水表现出最好的耐受性，在浓度为50％的猪废水中生长时，生物量最高（5.45 g / L），蛋白质生产率最高（0.27 g / L / d）。使用海绵作为固体载体的细胞固定进一步将最大生物量浓度和蛋白质生产率分别提高到8.08 g / L和0.272 g / L / d。重复使用微藻负载的海绵分别导致平均生物量生产和蛋白质生产率分别为6.51 g / L和0.15 g / L / d。化学需氧量 猪废水的总氮和总磷去除效率分别为90.1、97.0和92.8％。这种创新的养猪废水处理方法在养猪场同时进行废水处理和富含蛋白质的微藻生物质生产方面表现出卓越的性能。