Influences of light and oxygen conditions on photosynthetic bacteria macromolecule degradation: Different metabolic pathways
Influences of light and oxygen conditions on photosynthetic bacteria macromolecule degradation: Different metabolic pathways
复制标题
光氧条件对光合细菌大分子降解的影响：不同的代谢途径
DOI：
10.1016/j.biortech.2011.07.114
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发表时间：
2011-10-01
影响因子：
11.4
通讯作者：
Lu, Yufeng
中科院分区：
文献类型：
--
作者：
Lu, Haifeng;Zhang, Guangming;Lu, Yufeng
光合细菌直接降解大分子物质是光合细菌废水处理的重要工业应用。光和氧是光合细菌生长过程中最重要的参数。研究了光合细菌在光照-厌氧、自然光照-微氧和黑暗-好氧三种不同光氧条件下的大分子降解过程。结果表明，在三种不同的光氧条件下。PSB对大分子物质的降解率在90%以上，对COD、TN、TP、总糖和蛋白质的去除率也很高，生物产量接近0. 5 mg-biomass/mg-COD-removal。光和氧对效率有显著影响。高氧条件下大分子物质和污染物的去除率高于轻度厌氧条件。理论分析表明，在好氧条件下，光合细菌进行氧化磷酸化，污染物得到充分利用，矿化度高。在轻度厌氧条件下，光合细菌主要进行光合磷酸化和发酵，污染物去除效率较低。(C)2011爱思唯尔有限公司保留所有权利。
Direct degradation of macromolecules by photosynthetic bacteria (PSB) is important for the industrial application of PSB wastewater treatment. Light and oxygen are the most important parameters in PSB growth. This paper studied the PSB macromolecule degradation process under three different light and oxygen conditions: light-anaerobic, natural light-microaerobic and dark-aerobic. The results showed that under three different light-oxygen conditions. PSB degradation of macromolecules was higher than 90%; the removal ratios of COD, TN, TP, total sugar and protein were also high; and the biomass yield reached nearly 0.5 mg-biomass/mg-COD-removal. Light and oxygen significantly influenced the efficiency. Macromolecules and pollutants removals were higher under oxygen condition than those under light-anaerobic condition. Theoretical analysis showed that under aerobic condition, PSB carried out oxidative phosphorylation, in which pollutants were sufficiently utilized with high mineralization degree. Under light-anaerobic condition, PSB carried out photophosphorylation and fermentation, which led to low pollutants removal efficiency. (C) 2011 Elsevier Ltd. All rights reserved.