利用微藻同步实现CO_2生物固定与养殖废水脱氮除磷_赵云

第 8 卷第 9 期环 境 工 程 学 报Vol ． 8 ，No ． 92 0 1 4 年 9 月Chinese Journal of Environmental EngineeringSep ． 2 0 1 4利用微藻同步实现 CO2 生物固定与养殖废水脱氮除磷赵云陈家城沈英*王鹭徐新苗( 福州大学机械工程及自动化学院，福州 350116)摘要文章欲通过对小球藻 Chlorella sp． 的优化培养提高微藻的固碳率以及对养殖废水中氮、磷的去除率。探讨了光强、初始氮浓度( ITNC) 、CO2 通气比、通气间隔时间和连续培养时间等因素对 Chlorella sp． 固定 CO2 和净化污水的能力的影响。结果表明，在光强 240 μmol/( m·s) 、初始氮浓度 128 mg/L、通气比 0． 3 m3 /( m3·min) 、通气通断间隔 15 s/60 s 条件下培养10 d，微藻达到最高固碳率 564．67 mg/( L·d) ，与此同时，氮、磷去除率和生物质浓度分别达到 66．72%、55．95%和 3．50 g/L。关键词微藻培养二氧化碳污水生物质Chlorella sp．中图分类号X511文献标识码A文章编号1673-9108( 2014) 09-3553-06Microalgal culture for CO2 fixation and manure wastewater treatmentZhao YunChen JiachengShen YingWang LuXu Xinmiao( College of Mechanical Engineering and Automation，Fuzhou University，Fuzhou 350116，China)AbstractThe objective of this paper was to understand and optimize both CO2 fixing and nutrient removalby culturing Chlorella sp． The influences of light intensity，initial total nitrogen concentration ( ITNC) ，aerationrate，aeration period and culture duration on CO2 fixing rate and nitrogen /phosphors removing rate of Chlorellasp． were investigated． The results showed that the maximum CO2fixing rate of 564． 67 mg /( L·d) with biomassconcentration of 3． 50 g /L，nitrogen and phosphors removal rates of 66． 72% and 55． 95% were achieved underthe optimal conditions: light intensity of 240 μmol/( m2·s) ，ITNC of 128 mg /L，aeration rate of 0． 3 m3 /( m3·min) ，aeration period of 15 s/60 s ( on /off) and culture duration of 10 days．Key wordsmicroalgae cul...