利用二形栅藻处理养鸭废水的研究

Research About Using Scenedesmus dimorphus to Treat Ducks-wastewater

为了降低养鸭废水对环境的危害,减少大规模培养产油微藻的成本,使微藻处理污水与制备生物柴油结合起来具有广阔的应用前景,利用二形栅藻处理养鸭废水,通过研究不同pH值、接种量和吲哚乙酸添加浓度对二形栅藻生长的影响,以生物质产率为指标,在单因素试验的基础上,采用响应面法的BBD组合设计,对二形栅藻的培养条件进行优化。结果显示:二形栅藻对养鸭废水具有良好的处理能力,对总氮、总磷、氨氮的去除率分别达到了79.27%、83.27%、88.37%。最佳培养条件为:pH 8.8,接种量30.63%,吲哚乙酸添加浓度为0.60 mg/L,在此条件下二形栅藻的生物质产率为0.0723 g/(L·d)。

In order to reduce the environmental hazards of ducks-wastewater and decrease the cost of largescale cultivation of microalgae, Scenedesmus dimorphus was used for treatment of ducks-wastewater to investigate the effects of different pH, inoculation amount and concentration of indole acetic acid on the biomass production rate of Scenedesmus dimorphus. On the basis of single factor experiments, the culture conditions of Scenedesmus dimorphus in ducks-wastewater were optimized by response surface method. The results indicated that： Scenedesmus dimorphus had a good processing capacity on ducks-wastewater, the removal rate of total nitrogen, total phosphorus, ammonia nitrogen reached 79.27%, 83.27% and 88.37%, respectively. The optimal culture conditions were determined 8.8 of pH value, 30.63% of inoculation and 0.60 mg/L of indole acetic acid, and a high biomass production rate of 0.0723 g/（L·d） was obtained. The results suggested that ducks-wastewater was a promising feedstock for production of microalgae.