School of Environment & Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, China.
College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
Bioresour Technol. 2015 Mar;179:505-509. doi: 10.1016/j.biortech.2014.12.077. Epub 2014 Dec 30.
This study is aimed at enhancing biomass and pigments production together with pollution removal in photosynthetic bacteria (PSB) wastewater treatment via different light sources. Red, yellow, blue, white LED and incandescent lamp were used. Results showed different light sources had great effects on the PSB. PSB had the highest biomass production, COD removal and biomass yield with red LED. The corresponding biomass, COD removal and biomass yield reached 2580 mg/L, 88.6% and 0.49 mg-biomass/mg-COD-removal, respectively. The hydraulic retention time of wastewater treatment could be shortened to 72 h with red LED. Mechanism analysis showed higher ATP was produced with red LED than others. Light sources could significantly affect the pigments production. The pigments productions were greatly higher with LED than incandescent lamp. Yellow LED had the highest pigments production while red LED produced the highest carotenoid/bacteriochlorophyll ratio. Considering both efficiency and energy cost, red LED was the optimal light source.
本研究旨在通过不同光源提高光合细菌（PSB）废水处理中的生物量和色素生产以及污染去除。使用了红、黄、蓝、白 LED 和白炽灯。结果表明，不同的光源对 PSB 有很大的影响。PSB 在红光 LED 下具有最高的生物量生产、COD 去除和生物量产率。相应的生物量、COD 去除和生物量产率分别达到 2580mg/L、88.6%和 0.49mg-生物量/mg-COD 去除。红光 LED 可将废水处理的水力停留时间缩短至 72 小时。机理分析表明，红光 LED 比其他光源产生更高的 ATP。光源会显著影响色素的生产。LED 产生的色素比白炽灯高得多。黄光 LED 的色素产量最高，而红光 LED 产生的类胡萝卜素/菌叶绿素比值最高。考虑到效率和能源成本，红光 LED 是最佳光源。
