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固定化藻菌胶球去除养殖用水中无机氮的试验研究
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Abstract:
未经处理的养殖用水排放进湖泊等水域原生态水域极其容易造成水质恶化，养殖用水虽然无法限制用量，但是具有易于集中处理的特点，是一种可再生的水资源。相较于物理处理的方法覆盖面积有限，化学处理方法会对水质产生无法掌控的影响，生物净化综合成本较低，可以作为水生生态系统的一部分与养殖动物相辅相成。本实验选用PVA-SA作为藻菌复合载体，硼酸-CaCl2作为交联剂，将藻菌一同固定化，以固定化藻菌胶球对养殖用水中整体的无机氮即氨态氮、亚硝酸盐氮和硝酸盐氮的去除率作为主要指标，进行固定化藻菌胶球去除养殖用水中无机氮的试验研究。固定化藻菌胶球中藻菌比例10:1较1:1和1:10组在净化无机氮上有明显的优势，藻菌比例10:1分别对氨态氮、亚硝酸盐氮、硝酸盐氮最大去除率为86.44%、95.57%、79.16%。
The discharge of untreated aquaculture water into lakes and other water bodies in the original ecological water is extremely easy to cause deterioration of water quality. Although the amount of aquaculture water cannot be limited, it can concentrate on treatment and is a kind of renewable water resources. Compared with the limited area covered by physical treatment methods, chemical treatment methods will have an uncontrollable impact on water quality. The overall cost of biological purification is lower, which can be used as a part of the aquatic ecosystem to complement each other with farmed animals. In this experiment, PVA-SA was used as a composite carrier for algae and bacteria, and boric acid-CaCl2 was used as a cross-linking agent to immobilize the algae and bacteria together. The immobilized algae gel ball was used to affect the overall inorganic nitrogen in the breeding water, namely ammonia nitrogen and nitrite. The removal rate of nitrogen and nitrate nitrogen was used as in our experimental study to remove inorganic nitrogen in aquaculture water by immobilized algal gelatin balls. Compared with 1:1 and 1:10 groups, the ratio of 10:1 in immobilized algae gel pellets has obvious advantages in purifying inorganic nitrogen. The maximum removal rate of nitrogen, nitrite nitrogen and nitrate nitrogen is 86.44%, 95.57% and 79.16%.
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