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| 大型海藻-硝化细菌共培养处理养殖尾水的研究 |
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崔晓迪1,2, 董逸3, 刘汇芹4, 李可轩1,2, 王金霞1
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1.中国科学院海洋研究所 实验海洋生物学重点实验室, 山东 青岛 266071;2.中国科学院大学, 北京 100049;3.中国科学院 海洋研究所海洋生态与环境科学重点实验室, 山东 青岛 266071;4.中国海洋大学 海洋生命学院, 山东 青岛 266071
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| 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(Ulva pertusa)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(Ulva pertusa)无性系 藻-菌共生 养殖尾水 固定化技术 |
| DOI：10.11759/hykx20250215001 |
| 分类号:X714 |
| 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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CUI Xiaodi1,2, DONG Yi3, LIU Huiqin4, LI Kexuan1,2, WANG Jinxia1
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1.CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.CAS Key Laboratory of Marine Ecology and Environment Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;4.College of Marine Life Sciences, Ocean University of China, Qingdao 266071, China
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| Abstract: |
| The efficient removal of nitrate and phosphate is challenging for 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; however, microalgae are predominantly used. In this study, we constructed algal-bacterial aggregates using the asexual strain of the macroalga Ulva pertusa and nitrifying bacteria, and these aggregates were then applied to treat simulated aquaculture effluents. The results revealed that the algal-bacterial aggregates significantly outperformed the single-bacterial group for the removal of nitrogen and phosphorus pollutants, with removal rates of NH4+-N and PO43--P reaching 99.2% and 98.2%, respectively. Furthermore, they exhibited 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. In addition, the growth capacity and photosynthetic activity of U. pertusa were further enhanced. These findings indicate the existence of a mutualistic mechanism between macroalgae and nitrifying bacteria. Moreover, their synergistic action improved the removal efficiency of inorganic nitrogen and phosphorus in aquaculture effluents and increased the dissolved oxygen in the water. Overall, this is a highly efficient and feasible method for the treatment of aquaculture effluents. |
| Key words: Ulva pertusa asexual strain algae-bacteria symbiosis aquaculture effluent immobilization technology |