GR24 浓度对基于微藻技术的沼气升级和营养物质去除的影响。
Effect of GR24 concentrations on biogas upgrade and nutrient removal by microalgae-based technology.
机构信息
College of Agricultural Engineering, Hohai University, Nanjing 210098, PR China.
Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, PR China.
出版信息
Bioresour Technol. 2020 Sep;312:123563. doi: 10.1016/j.biortech.2020.123563. Epub 2020 May 20.
Freshwater microalgae Chlorella vulgaris was cultured and induced with strigolactone (GR24) to simultaneously eliminate nutrients in biogas slurry and purify biogas. Treatment with 10 M GR24 yielded maximum growth rate and mean daily productivity for algae at 0.187 ± 0.06 d and 0.097 ± 0.008 g L d, respectively. Results from chlorophyll fluorescence transients method demonstrated that moderate concentration of GR24 could enhance the photosynthetic performance of microalgae. In addition, GR24 affected intracellular carbonic anhydrase activity and chlorophyll-a content. Maximum chemical oxygen demand, total nitrogen, and CO removal efficiencies were 78.62 ± 2.36%, 76.47 ± 1.53% and 64.05 ± 1.15% with 10 M GR24 induction, respectively. Further, highest total phosphorus removal efficiency (80.27 ± 1.93%) was observed at 10 M. The optimal GR24 concentration range was determined to be between 10 and 10 M in consideration with nutrient and CO removal efficiencies.
小球藻是一种淡水微藻，用 Strigolactone（GR24）培养和诱导，同时去除沼气中的营养物质并净化沼气。用 10 μM GR24 处理，小球藻的最大生长率和平均日生产率分别为 0.187±0.06 d 和 0.097±0.008 g L d。叶绿素荧光瞬变法的结果表明，适量浓度的 GR24 可以增强微藻的光合作用性能。此外，GR24 影响细胞内碳酸酐酶活性和叶绿素-a 含量。在 10 μM GR24 诱导下，最大的化学需氧量、总氮和 CO 去除效率分别为 78.62±2.36%、76.47±1.53%和 64.05±1.15%。此外，在 10 μM 时总磷去除效率最高（80.27±1.93%）。综合考虑营养物质和 CO 去除效率，确定最佳 GR24 浓度范围为 10-100 μM。
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