钛酸盐纳米材料介导下微藻净化生活污水的效应

TREATMENT OF RURAL DOMESTIC SEWAGE USING MICROALGA MEDIATED BY TITANATE NANO MATERIALS

为研究钛酸盐纳米材料(TNTs)介导下微藻对生活污水的处理效应,设置不同的TNTs添加方式与5种微藻协同处理生活污水,比较不同藻种和处理方式下叶绿素的光化学效率和光合色素含量,筛选优势藻种和高效处理方式。结果表明,TNTs能够显著加强微藻对生活污水的处理效果。在添加TNTs后,5种微藻细胞均出现团聚现象,叶绿素a和类胡萝卜素的含量均有所上升。微藻对生活污水的处理效果均在TNTs介导2d后最好,斜生四链藻(Tetradesmus obliquus)对COD和NH3-N的去除率最高,达到95.00%和88.62%;普通小球藻(Chlorella vulgaris)对TN的去除率最高,达到95.00%;四尾栅藻(Scenedesmus quadricauda)对TP的去除率最高,达到79.43%。与微藻单独处理相比,TNTs添加显著提升了污染物的降解率(>10%)和微藻除污率(>5%)。TNTs介导在微藻深度处理生活污水中具有一定的应用前景。

The safe disposal of domestic sewage has posed a serious threat to the safety of drinking water sources.Microalgae have remarkable effects on the advanced treatment of domestic sewage,but the sewage has strong inhibitory effects on algae.Nanoparticles have a positive regulatory effect on the growth of microalgae.Therefore,exploring the appropriate nano materials and adding methods,and studying their effects on the treatment of domestic sewage by microalgae are meaningful.In this study,titanate nano materials(TNTs)and microalgae were synergistically used to purify domestic sewage.Different addition methods of TNTs were set up to treat domestic sewage together with five microalgae.The photochemical efficiency of chlorophyⅡand photosynthetic pigment using different algae species and treatment methods were compared.The superior algae species and efficient treatment methods were screened.The results showed that TNTs could significantly enhance the treatment effect of microalgae on domestic sewage.After the addition of TNTs,microalgae cells all showed aggregation,and the contents of chlorophyll a and carotenoids increased.Inoculation of after Microalgae had the best effect on domestic sewage treatment after TNTs mediated two days later.Tetradesmus obliquus,T.obliquus,Chlorella vulgaris,and Quadricauda sp.had the highest removal rates of COD,NH3-N,TN,and TP(95.00%,88.62%,83.14%and 79.43%),respectively.Compared with microalgae alone,the addition of TNTs significantly increased the degradation rate of pollutants(>10%)and the removal rate from microalgae(>5%).TNTs has a certain application prospect in microalgae advanced treatment of domestic sewage.