^(12)C^(6+)重离子突变藻株混合处理黑臭水性能研究  

Treatment Performance of Black and Odorous Water by Use of Microalgae Mutated through^(12)C^(6+)Heavy Ion Irradiation and Mixed Cultivation

作　　者：邵一桐 谭周亮[2,3] 付永胜 陈杨武 金文杰 李欣[2,3] SHAO Yitong;TAN Zhouliang;FU Yongsheng;CHEN Yangwu;JIN Wenjie;LI Xin(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;Key Lab of Environmental and Applied Microbiology,Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China;Sichuan Provincial Key Lab of Environmental Microbiology,Chengdu 610041,China;Institute of Modem Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都611756 [2]中国科学院成都生物研究所环境与应用微生物重点实验室,四川成都610041 [3]四川省环境微生物重点实验室,四川成都610041 [4]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《环境科学与技术》2022年第4期47-53,共7页Environmental Science & Technology

基　　金：四川省科技厅重大科技专项(2018SZDZX0026)。

摘　　要：微藻混合培养可以在高效去除水质污染物的同时,积累更多生物量及油脂,促进微藻生物质资源化利用。然而存在菌种间相互竞争导致处理效果不佳的问题,故找出微藻藻种间最佳协同组合至关重要。该文通过将一株可在黑臭水中快速生长的原壳藻Auxenochlorella protothecoides,分别与污水处理中常用的普通小球藻Chlorella vulgaris、蛋白核小球藻Chlorella pyrenoidosa和斜生栅藻Scenedesmus bliquus进行不同比例混合培养,结果显示4种微藻1∶1∶1∶1混合培养为最佳组合。为进一步提升水中污染物去除效率,促进资源化利用水平,将经C重离子辐照诱变后的4种藻株按相同比例混合培养进行性能强化,结果表明:相比初始藻株组合,^(12)C^(6+)重离子突变藻株组合COD、NH_(4)^(+)-N及TP最大去除率分别提高了12.12%、11.01%及22.12%,其最大比生长速率和油脂增长率分别提高了63.03%和79.71%。By means of microalgae mixed cultivation,it is possible to efficiently remove pollutants from the water,and at the same time more biomass and lipid could be accumulated,so as to facilitate the resource utilization of microalgae biomass;however,the result is unlikely to be ideal due to the competition existed among the microalgae species,so it is important to seek for the best synergistic combination out of microalgae species.In this paper,cultivation of the microalgae commonly used in wastewater treatment and rapidly grown in odorous surface waters,including Auxenochlorella protothecoides,Chlorella vulgaris,Chlorella pyrenoidosa and Scenedesmus bliquus,which were mixed in different proportions,was conducted in laboratory scale,and the results showed that mixed cultivation of four microalgae with the proportion of 1∶1∶1∶1 was the best combination.In order to further improve the removal efficiency of water pollutants and step up the recovery level of resources,the four microalgae strains were mutated by^(12)C^(6+) heavy ion irradiation and then cultivated mixedly in the same proportion to enhance their performance.Consequently,it was showed that compared with that beforeCheavy ion irradiation,the removal rates of COD,NH_(4)^(+)-N and TP of the mutated microalgal strains increased respectively by 12.12%,11.01%and 22.12%;and the maximum specific growth rate and lipid growth rate were raised by 63.03%and 79.71%,respectively.

关 键 词：微藻 混合培养 黑臭水 ^(12)C^(6+)重离子突变 污染物去除 生长特性 

分 类 号：X173[环境科学与工程—环境科学]