College of Water Resource and Civil Engineering, China Agriculture University, Beijing, China.
State Key Laboratory of Coal Resources and Safe Mining, Beijing, China.
Water Environ Res. 2020 Aug;92(8):1131-1141. doi: 10.1002/wer.1308. Epub 2020 Mar 9.
Photosynthetic bacteria (PSB) technology is a promising method for biomass, protein, pigments, and other value-added substances generation from wastewater. However, the above bioresources production efficiency is relatively low. In this work, a static magnetic field (SMF) was used to promote bioresources production. Results showed that SMF had positive effects on value-added substances production. With 0.35 Tesla (T) SMF, the PSB biomass, protein, carotenoids, and bacteriochlorophyll concentration were promoted by 31.1%, 22.6%, 56.7%, and 73.1% compared with the control group, respectively. Biomass yield finally reached 0.58 g biomass/g COD removal, which was promoted by 37.1%. The doubling time was shortened by 37.9% in 0.35 T group, showing that SMF can promote cell growth. With 0.35 T SMF, the intracellular NADH dehydrogenase and ATP synthase activities concentration increased by 23.4% and 29.1%, respectively, thus increased the ATP content by 38.0%. Succinic dehydrogenase activity concentration greatly increased by 609.0% at 48 hr, which potentially accelerated the tricarboxylic acid cycle and COD degradation as well as enhanced biomass production. PRACTITIONER POINTS: SMF promoted PSB bioresource production during wastewater treatment processing. Biomass, protein, carotenoids, and Bchl concentration were promoted by 31.1%, 22.6%, 56.7%, and 73.1%, respectively. PSB yield of 0.35 T group was promoted by 37.1% compared with the control group. SDH concentration of 0.35 T was promoted by 609.0% compared with the control group. Increased NADH and ATP synthase activity concentration by SMF enhanced energy metabolism.
光合细菌（PSB）技术是从废水中生成生物质、蛋白质、色素和其他增值物质的有前途的方法。然而，上述生物资源的生产效率相对较低。在这项工作中，我们使用静态磁场（SMF）来促进生物资源的生产。结果表明，SMF 对增值物质的生产有积极的影响。在 0.35 特斯拉（T）SMF 下，PSB 生物质、蛋白质、类胡萝卜素和菌叶绿素浓度分别比对照组提高了 31.1%、22.6%、56.7%和 73.1%。最终生物质产量达到 0.58g 生物质/gCOD 去除，提高了 37.1%。在 0.35T 组中，倍增时间缩短了 37.9%，表明 SMF 可以促进细胞生长。在 0.35T SMF 下，细胞内 NADH 脱氢酶和 ATP 合酶活性浓度分别提高了 23.4%和 29.1%，从而使 ATP 含量增加了 38.0%。琥珀酸脱氢酶活性浓度在 48 小时时大大提高了 609.0%，这可能加速了三羧酸循环和 COD 降解，并增强了生物质的产生。实践者要点：SMF 在废水处理过程中促进 PSB 生物资源的生产。生物质、蛋白质、类胡萝卜素和 Bchl 浓度分别提高了 31.1%、22.6%、56.7%和 73.1%。与对照组相比，0.35T 组的 PSB 产量提高了 37.1%。与对照组相比，0.35T 组的 SDH 浓度提高了 609.0%。SMF 增加了 NADH 和 ATP 合酶活性浓度，增强了能量代谢。
