School of Municipal and Environmental Engineering, Shandong Jianzhu University, JiNan 250101, China; Co-Innovation Center of Green Building, JiNan 250101, China.
School of Municipal and Environmental Engineering, Shandong Jianzhu University, JiNan 250101, China; Co-Innovation Center of Green Building, JiNan 250101, China.
Sci Total Environ. 2021 Oct 20;792:148428. doi: 10.1016/j.scitotenv.2021.148428. Epub 2021 Jun 16.
The combination of lactic acid production wastewater and oil-producing microalgal culture could not only achieve harmless treatment of wastewater but also provided nutrients and significant amounts of water for microalgal culture. Thus the effects of different nutrients on the biomass yield, lipid yield of Scenedesmus dimorphus with lactic acid wastewater were investigated. Although lactic acid wastewater was very suitable for the cultivation of oil-producing microalgae, some nutrients were still needed. So 0.79 g/L NaNO, 14 mg/L MgSO·7HO, 4 mg/L KHPO·3HO, and trace elements needed to be added in the microalgal culture with lactic acid wastewater. In the optimized wastewater medium, the lipid yield could reach 1.54 ± 0.04 g/L, which was 48.1% higher than the level of 1.04 ± 0.06 g/L in the BG11 medium. Microalgae cells had high absorption capacity for nitrogen and phosphorus. The nitrogen, phosphorus removal rate of wastewater reached 96.31% and 90.78%, respectively, after 10 days of culture. And the treated wastewater could be used for lactic acid production for four times. These investigations laid a foundation for reducing the pollution of lactic acid wastewater, exploring a late-model for oleaginous microalgae cleaner production.
将产乳酸废水与产油微藻培养液相结合，不仅可以实现废水的无害化处理，还可以为微藻培养液提供养分和大量的水。因此，研究了不同营养物质对产油微藻 Scenedesmus dimorphus 利用产乳酸废水的生物量和油脂产量的影响。尽管产乳酸废水非常适合产油微藻的培养，但仍需要一些营养物质。因此，在利用产乳酸废水进行微藻培养时，需要添加 0.79 g/L 的 NaNO3、14 mg/L 的 MgSO4·7H2O、4 mg/L 的 KH2PO4·3H2O 和微量元素。在优化的废水培养基中，油脂产量可达 1.54 ± 0.04 g/L，比 BG11 培养基中的 1.04 ± 0.06 g/L 水平提高了 48.1%。微藻细胞对氮磷具有很强的吸收能力。培养 10 天后，废水的氮、磷去除率分别达到 96.31%和 90.78%。处理后的废水可用于乳酸生产 4 次。这些研究为减少产乳酸废水的污染、探索新型产油微藻清洁生产模式奠定了基础。
