Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, PR China.
Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, PR China.
Bioresour Technol. 2015 Aug;190:257-63. doi: 10.1016/j.biortech.2015.04.053. Epub 2015 Apr 21.
The combination of tertiary wastewater treatment and microalgal lipid production is considered to be a promising approach to water eutrophication as well as energy crisis. To intensify wastewater treatment and microalgal biofuel production, the effect of organic and inorganic carbon on algal growth and nutrient removal of Scenedesmus obliquus were examined by varying TOC (total organic carbon) concentrations of 20-120mgL(-1) in wastewater and feeding CO2 concentrations in the range of 0.03-15%, respectively. The results showed that the maximal biomass and average lipid productivity were 577.6 and 16.7mgL(-1)d(-1) with 5% CO2 aeration. The total nitrogen, total phosphorus and TOC removal efficiencies were 97.8%, 95.6% and 59.1% respectively within 6days when cultured with real secondary municipal wastewater. This work further showed that S. obliquus could be utilized for simultaneous organic pollutants reduction, N, P removal and lipid accumulation.
三级废水处理与微藻油脂生产相结合被认为是解决水富营养化和能源危机的一种很有前途的方法。为了强化废水处理和微藻生物燃料的生产，通过改变废水中总有机碳（TOC）浓度为 20-120mg/L 和 CO2 浓度在 0.03-15%范围内，分别考察了有机碳和无机碳对斜生栅藻生长和营养物质去除的影响。结果表明，当 5%的 CO2 通气时，最大生物量和平均产油率分别为 577.6 和 16.7mg/L/d。在 6 天内用实际二级城市废水培养时，总氮、总磷和 TOC 的去除效率分别达到 97.8%、95.6%和 59.1%。这项工作进一步表明，斜生栅藻可用于同时减少有机污染物、去除氮磷和积累油脂。
