Prasad M S V, Varma A K, Kumari P, Mondal P
a Department of Chemical Engineering , Indian Institute of Technology Roorkee , Roorkee , Uttarakhand , India.
Environ Technol. 2018 Mar;39(5):669-681. doi: 10.1080/09593330.2017.1310302. Epub 2017 Apr 11.
The major concerns of the modern society such as increasing population, climate change and economic development are imposing continuous stress on water and energy resources. The present work deals with the cultivation of green algae Desmodesmus abundans for optimum biomass productivity and lipid content as well as simultaneous removal of nitrate and phosphate from synthetic wastewater. The algal biomass is characterized by ultimate analysis, scanning electron microscopic analysis and thermogravimetric analysis. The effect of time, inoculum concentration and nitrate concentration on four responses (biomass productivity, lipid content, removal of nitrate and removal of phosphate) are studied by response surface methodology using central composite design. The quadratic models are found to be suitable for each response. At optimized experimental conditions, the algae showed biomass productivity of 46.96 mg L day, lipid content of 16.23%, nitrate removal of 86.64% and phosphate removal of 87.52% after 27 days, when the initial inoculum concentration was 6% and nitrate concentration was 1.25 g L.
现代社会的主要问题，如人口增长、气候变化和经济发展，正不断给水资源和能源资源带来压力。目前的工作涉及培养绿藻丰富栅藻，以实现最佳生物质生产力和脂质含量，同时从合成废水中去除硝酸盐和磷酸盐。通过元素分析、扫描电子显微镜分析和热重分析对藻类生物质进行表征。采用中心复合设计的响应面法研究了时间、接种物浓度和硝酸盐浓度对四个响应（生物质生产力、脂质含量、硝酸盐去除率和磷酸盐去除率）的影响。发现二次模型适用于每个响应。在优化的实验条件下，当初始接种物浓度为6%且硝酸盐浓度为1.25 g/L时，藻类在27天后的生物质生产力为46.96 mg L day，脂质含量为16.23%，硝酸盐去除率为86.64%，磷酸盐去除率为87.52%。
