College of Animal Science and Technology, Henan University of Animal Husbandry and Economy, Zhengzhou, China.
Suzhou Institute of Trade & Commerce, Suzhou, China.
Water Environ Res. 2024 Jan;96(1):e10977. doi: 10.1002/wer.10977.
The construction of dominant algal species and bacterial strains in algal treatment technology was crucial for pollutant removal. In order to enhance the purification capability of microalgae toward heavy metals in water as well as biogas slurry and biogas, symbiotic systems were respectively constructed using Chlorella vulgaris and two different endogenous bacteria (microalgal endophytic bacteria S395-2 and plant endophytic bacteria BEB7). The results demonstrated that the endogenous bacteria (S395-2 and BEB7) effectively promote the growth, biomass yield, photosynthetic activity, and carbonic anhydrase activity of microalgae. Additionally, BEB7 exhibited superior promotion effects on microalgae compared to S395-2. Moreover, the BEB7-microalgae co-cultivation system not only efficiently removed heavy metals from water but also effectively purified the nutrients and CO in biogas slurry. The optimal effect was observed when the ratio of BEB7 to microalgae was 10:1. This study has established a solid theoretical foundation for the application of microalgae in pollutant purification. PRACTITIONER POINTS: Endogenous bacteria effectively promoted microalgal performance. The optimal ratio of BEB7 to microalgae was 10:1. Chlorella vulgaris-BEB7 showed the best removal performance.
藻处理技术中优势藻种和细菌菌株的构建对于污染物的去除至关重要。为了提高微藻对水中重金属以及沼液和沼气的净化能力，分别利用小球藻和两种不同的内源性细菌（藻内共生细菌 S395-2 和植物内共生细菌 BEB7）构建共生系统。结果表明，内源性细菌（S395-2 和 BEB7）可有效促进微藻的生长、生物量产量、光合作用和碳酸酐酶活性。此外，BEB7 对微藻的促进作用优于 S395-2。此外，BEB7-微藻共培养系统不仅能有效去除水中的重金属，还能有效净化沼液中的养分和 CO。当 BEB7 与微藻的比例为 10:1 时，效果最佳。本研究为微藻在污染物净化中的应用奠定了坚实的理论基础。
