摘要
利用光合细菌(PSB)对废水进行处理可以同时实现对污染物的降解与生物质资源的转化利用。PSB的光合作用中心吸收光谱位于近红外光光谱范围内,因此近红外光可能是提高PSB废水资源化效率的有利条件。探索了近红外光对采用沼泽红假单胞菌(R.palustris)实现废水资源化效果的影响,结果表明,近红外光有利于提高R.palustris从废水中累积高价值生物质的能力。近红外光单独作用可将R.palustris的指数增长期缩短为2 d并提高其生物量与色素产量,实验条件下生物质质量浓度与菌体产率分别为1156.22 mg/L与(0.282±0.031)g/g,类胡萝卜素和菌绿素最高质量浓度分别为5.48、44.00 mg/L;近红外光与自然光叠加有利于累积辅酶Q_(10)(CoQ_(10)),实验条件下干菌体中CoQ_(10)质量分数可达41.83 mg/g;近红外光与白炽灯叠加可提高R.palustris蛋白质产率并提高污水处理效率,实验条件下蛋白质质量浓度与产率分别高达790.76 mg/L与(3.625±0.156)g/g,对污水中COD和NH_(4)+-N去除率分别达80.84%、91.44%。近红外光的使用为提高PSB污水资源化效率提供了新的方法与思路。
Using photosynthetic bacteria(PSB)to treat wastewater can simultaneously realize pollutant degradation and valuable biomass resource conversion and utilization.The photosynthetic center absorption spectrum of PSB is located in the near-infrared light spectrum range,which may be a favorable condition to improve the resource utilization efficiency using PSB to treat wastewater.This study focused on exploring the effects of the near-infrared light on the wastewater resource utilization effect of R.palustris.The results showed that the near-infrared light could facilitate the accumulation of R.palustris high-value biomass from wastewater.R.palustris growth period was shorted to 2 days and biomass accumulation and pigments production were enhanced just by the near-infrared light.Under this condition,the biomass mass concentration and biomass yield reached the highest level of 1156.22 mg/L and(0.282±0.031)g/g,carotenoids and bacteriochlorophyll mass concentration reached the highest level of 5.48 and 44.00 mg/L,respectively.The superposition of the near-infrared light and natural light facilitated the synthesis of Coenzyme Q_(10)(CoQ_(10)).Under this condition,CoQ_(10) mass fraction reached 41.83 mg/g.The superimposition of the nearinfrared light with incandescent light promoted protein yield of R.palustris and improved wastewater treatment efficiency.Under this condition,the protein mass concentration and yield were as high as 790.76 mg/L and(3.625±0.156)g/g,COD and NH_(4)+-N removal rates reached 80.84%and 91.44%,respectively.The use of near-infrared light provides a new method and idea for improving the resource efficiency of PSB wastewater recycling.
作者
王翠翠
卢海凤
张光明
司哺春
蒋伟忠
WANG Cuicui;LU Haifeng;ZHANG Guangming;SI Buchun;JIANG Weizhong(Sanya Institute of China Agricultural University,Sanya 572025,China;College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China;Key Laboratory of Agricultural Engineering in Structure and Environment of MOARA,Beijing 100083,China;College of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300131,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2023年第11期126-136,共11页
Industrial Water Treatment
基金
国家重点研发计划项目(2022YFE0135600)。
关键词
沼泽红假单胞菌
光合细菌
近红外光
废水资源化
R.palustris
photosynthetic bacteria
near-infrared light
wastewater resource recovery
