【摘要】 废水中氮、磷浓度过高引起了日益严重的水体富营养化问题,菌藻系统能有效降解废水中的氮、磷、有机质等污染物,并将其转化为生物质,具有良好的环境与经济效益。文章分别选用活性污泥、混合藻及两者混合物处理二级出水,观察不同处理阶段的群落组成,研究活性污泥、混合藻及菌藻系统对氮、磷的去除效率以及转化的生物质的组成及含量。结果表明:二级出水的组成中,混合藻中主要为小球藻和栅藻,活性污泥中主要为菌类,菌藻系统是由菌类和微藻共同组成;菌藻系统对氨氮、磷的去除率分别为94.16%、83.30%,优于混合藻和活性污泥的;菌藻系统具有更高的生物质产出量,其蛋白质、多糖、总脂的含量分别为53.20、16.69、21.16 mg/100 mg。更多还原

【Abstract】 The high concentration of nitrogen and phosphorus in waste water causes more and more serious eutrophication of water, the bacteria-algae system can effectively degrade nitrogen, phosphorus, organic matter and other pollutants in waste water, and convert it into biomass, which has good environmental and economic benefit. In this paper, activated sludge, mixed algae and their mixtures were selected to treat the secondary effluent, the community composition of different treatment stages was observed, and the removal efficiency of nitrogen and phosphorus by activated sludge, mixed algae and bacteria-algae system, as well as the composition and content of transformed biomass were studied. The results show that in the composition of the secondary effluent, the mixed algae are mainly Chlorella vulgaris and Scenedera vulgaris, and the activated sludge is mainly fungi, the bacteria-algae system is composed of bacteria and microalgae. The removal rates of ammonia nitrogen and phosphorus in the bacteria-algae system are 94.16% and 83.30% respectively, which are better than those in the mixed algae and activated sludge. The biomass production of bacteria-algae system is higher, and the contents of protein, polysaccharide and total lipid are 53.20, 16.69 and 21.16 mg/100 mg respectively.更多还原