光源、氮源和碳源对紫色非硫细菌生长特性的影响

紫色非硫细菌（PNSB）能在厌氧光照条件下将污水中的氨氮、有机物和磷同化到细菌体内用于合成蛋白质等细胞物质，而不是转化为CO₂和N₂.为了优化PNSB的生长条件，以沼泽红假单胞菌为研究对象，考察了光源、氮源和碳源类型对PNSB生长的影响.结果表明厌氧红外光条件下PNSB的生长速率约是白炽灯条件下的3倍；PNSB对氨氮（NH₄⁺-N）的利用速率最快，同时也可利用硝态氮（NO₃^--N），亚硝态氮（NO₂^--N）；PNSB对乙酸钠的利用速率最快，其次是葡萄糖，最难利用的是淀粉，主要归因于大分子有机物需要水解酸化后才能被PNSB吸收利用.厌氧红外光条件下PNSB处理城市污水具有较好的应用前景.

Effects of light,nitrogen and carbon on the growth characteristics of purple non-sulfur bacteria

Purple non-sulfur bacteria (PNSB) can assimilate ammonia, organic matter and phosphorus in wastewater into the cell body to composite proteins and other cellular substances under the condition of anaerobic illumination, instead of converting to CO₂ and N₂. In order to optimize PNSB growth conditions, Rhodopseudomonas palustris was used to study the effect of light, nitrogen and carbon on PNSB growth in this paper. The results showed that the PNSB growth rate under anaerobic infrared illumination conditions is approximately three times that of incandescent lamps. PNSB has the fastest utilization rate of ammonia (NH₄⁺-N) and can utilize nitrate (NO₃^--N), nitrite (NO₂^--N). PNSB has the fastest utilization rate of sodium acetate, followed by glucose and starch. This is because macromolecular organic matter can only be further utilized by PNSB after being hydrolyzed and acidified. It is a promising to apply PNSB to wastewater treatment under anaerobic infrared illumination conditions.