| 摘要: |
| 硝酸盐、磷酸盐的高效去除一直是富营养化养殖尾水的处理难点。已有研究表明藻类-细菌联合进行尾水处理可提高其生物处理效能，但所用藻类多为微藻。本研究采用大型海藻孔石莼的无性系和硝化细菌构建藻菌球，并利用其处理模拟养殖尾水。结果表明，藻菌球对氮、磷污染物的去除效果明显高于单菌组，其中NH4+-N和PO43--P的去除率分别达到了99.2％和98.2％，去除速率也优于单藻组。硝化细菌对孔石莼的光合和生长也有明显促进作用，与单藻组相比，藻菌球中孔石莼的chla、chlb和类胡萝卜素含量分别增加了65.4％、37.8％和56.7％，生长速率和光合活性也进一步增强。表明孔石莼无性系和硝化细菌之间存在互惠机制，其协同作用不但可以提高养殖尾水中的无机氮磷去除率，还能够提高水中溶解氧，是一种可用于养殖尾水处理的高效可行的方法。 |
| 关键词: 孔石莼无性系 藻-菌共生 养殖尾水 固定化技术 |
| DOI： |
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| 基金项目:福建省STS 计划配套项目(2023T3056) |
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| Study on the treatment of aquaculture effluents using coupled cultivation of macroalgae and nitrifying bacteria |
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cuixiaodi1, dongyi1, liuhuiqin2, likexuan1, wangjinxia1
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1.Institute of Oceanology, Chinese Academy of Sciences;2.Ocean University of China
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| Abstract: |
| The efficient removal of nitrate and phosphate has always been a challenge in the treatment of eutrophicated aquaculture effluents. Existing studies have indicated that the combination of algae and bacteria for effluent treatment can enhance the efficiency of biological processes, yet the algae used are predominantly microalgae. In this study, we constructed algal-bacterial aggregates using the asexual strain of the macroalga Ulva pertusa and nitrifying bacteria, and utilized these aggregates to treat simulated aquaculture effluents. The results demonstrated that the algal-bacterial aggregates significantly outperformed the single-bacterial group in removing nitrogen and phosphorus pollutants, with removal rates of NH??-N and PO?3?-P reaching 99.2% and 98.2%, respectively, and exhibiting superior removal rates compared to the single-algal group. Compared with the single - algal group, the contents of chl a, chl b, and carotenoids in U. pertusa within the algal- bacterial aggregates increased by 65.4%, 37.8%, and 56.7%, respectively. The growth capacity and photosynthetic activity of U. pertusa were also further enhanced. These findings indicate the existence of a mutualistic mechanism between macroalgae and nitrifying bacteria. Their synergistic action not only improves the removal efficiency of inorganic nitrogen and phosphorus in aquaculture effluents but also increases the dissolved oxygen in the water. This method is highly efficient and feasible for the treatment of aquaculture effluents. |
| Key words: Ulva pertusa asexual strain algae-bacteria symbiosis aquaculture effluent immobilization technology |