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 Aug;190:196-200. doi: 10.1016/j.biortech.2015.04.092. Epub 2015 Apr 29.
This study aimed at enhancing the bacterial biomass and pigments production in together with pollution removal in photosynthetic bacteria (PSB) wastewater treatment via using different photoperiods. Different light/dark cycles and light/dark cycle frequencies were examined. Results showed that PSB had the highest biomass production, COD removal and biomass yield, and light energy efficiency with light/dark cycle of 2h/1h. The corresponding biomass, COD removal and biomass yield reached 2068mg/L, 90.3%, and 0.38mg-biomass/mg-COD-removal, respectively. PSB showed higher biomass production and biomass yield with higher light/dark cycle frequency. Mechanism analysis showed within a light/dark cycle from 1h/2h to 2h/1h, the carotenoid and bacteriochlorophyll production increased with an increase in light/dark cycle. Moreover, the pigment contents were much higher with lower frequency of 2-4 times/d.
本研究旨在通过使用不同的光周期来提高光合细菌（PSB）废水处理中的细菌生物量和色素生产以及污染去除。考察了不同的光照/黑暗周期和光照/黑暗周期频率。结果表明，在光照/黑暗周期为 2h/1h 时，PSB 的生物量、COD 去除率和生物量产率最高，光能效率最高。相应的生物量、COD 去除率和生物量产率分别达到 2068mg/L、90.3%和 0.38mg-生物量/mg-COD 去除率。PSB 表现出更高的生物量和生物量产率，随着光照/黑暗周期频率的增加。机理分析表明，在光照/黑暗周期从 1h/2h 变为 2h/1h 的过程中，类胡萝卜素和细菌叶绿素的产量随着光照/黑暗周期的增加而增加。此外，在较低的 2-4 倍/天的频率下，色素含量要高得多。
