微藻贴壁培养对沼液废水的处理效果

Purification effect for swine wastewater with attached culture of microalgae

以产油藻类栅藻、小球藻为研究对象,通过贴壁方式考查微藻处理养猪沼液废水的效果。结果表明,栅藻、小球藻均能在沼液中较好生长,其生物产率分别是6.26、6.08 g·m^(-2)·d^(-1),与在正常培养基上(BG11)相当。栅藻、小球藻在沼液中培养,藻细胞油脂积累分别占细胞干重的34.6%和31.4%,与正常培养基相差不大。栅藻、小球藻均能较好净化废水中主要污染指标氨氮(NH_3-N)、总磷(TP)及化学需氧量(COD),栅藻的去除率分别是96.59%、74.52%和72.47%,小球藻去除率分别是94.90%、73.55%和71.40%。本研究将产油微藻培养和养猪沼液废水处理相结合,研究结果可为藻类生物燃料生产及沼液废水资源化利用等提供理论基础。

The purification effect of swine wastewater treated by Scendesmus dimorphus and Chlorella pyrenoidosa with attached culture was investigated in this study. It was shown that the 2 strains could grow well in swine wastewater and the biomass of Scendesmus dimorphus and Chlorella pyrenoidosa reached 6. 26 and 6. 08 g·m^（-2）·d^（-1）,respectively. Meanwhile,the lipid content in the 2 strains was 34. 6% and 31. 4%,respectively,which was comparable with those cultivated in BG11 medium. Notably,attached culture of Scendesmus dimorphus and Chlorella pyrenoidosa could treat swine wastewater efficiently. The removal efficiency of ammonia nitrogen（ NH_3-N）,total phosphorus（ TP） and COD was 96. 59%,74. 52% and 72. 47%,respectively,by Scendesmus dimorphus and 94. 90%,73. 55% and 71. 40%,respectively,by Chlorella pyrenoidosa. Based on the results,a process combining algaebased wastewater treatment with attached cultivation and biodiesel production was proposed to treat swine wastewater.