Using saline-alkali leachate to cultivate microalgae is an effective way to realize the utilization of wastewater and alleviate the shortage of water resources. Light source is usually used as an optimized parameter to further improve the cultivation efficiency of microalgae. In this work, the influence of light qualities on the growth and high-valued substances accumulation of Chlorella sp. HQ in coastal saline-alkali leachate were investigated. The specific growth rate of Chlorella in coastal saline-alkali leachate was 0.27–0.60 d⁻¹. At the end of cultivation, the algal density under blue light reached 8.71 ± 0.15 × 10⁷ cells·mL⁻¹, which was significantly higher than the other light groups. The lipid content in the biomass was 29.31–62.95%, and the highest lipid content and TAGs content were obtained under red light and blue-white mixed light, respectively. Percentages of total chlorophylls (0.81–1.70%) and carotenoids (0.08–0.25%) were obtained in the final biomass of the coastal saline-alkali leachate. In addition, the contents of photosynthetic pigments and three high-valued products under mixed light were higher than those of monochromatic light, and the protein, total sugar and starch content under blue-red mixed light was 1.52–3.76 times, 1.54–3.68 times and 1.06–3.35 times of monochromatic blue light and red light, respectively.

利用盐碱浸出液培育微藻是实现废水利用、缓解水资源短缺的有效途径。通常采用光源作为优化参数，进一步提高微藻的培养效率。在这项工作中，光质量对小球藻生长和高价值物质积累的影响。调查了沿海盐碱渗滤液中的 HQ。沿海盐碱浸出液中小球藻的比生长率为0.27-0.60 d ^-1。培养结束时，蓝光下藻密度达到8.71±0.15×10 ^{7 个}细胞·mL ^-1，明显高于其他光组。生物质中的脂质含量为 29.31-62.95%，分别在红光和蓝白混合光下获得最高的脂质含量和 TAGs 含量。在沿海盐碱浸出液的最终生物量中获得了总叶绿素 (0.81–1.70%) 和类胡萝卜素 (0.08–0.25%) 的百分比。此外，混合光下光合色素和三种高价值产品的含量均高于单色光下，蓝红混合光下蛋白质、总糖和淀粉含量分别为1.52-3.76倍、1.54-3.68倍。和单色蓝光和红光的 1.06-3.35 倍。