一株耐低溫抗鹽堿異養(yǎng)硝化菌株CS-6的除氮特性研究

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中圖分類號：X172 文獻標志碼：A 文章編號：1004—6755（2025）07-0017-04

Denitrogenate characterization studies by a strain of heterotrophic nitrifying bacteria CS-6 resistant to low temperature resistant and salt alkali resistant *

JIANG Wenwen1， TIAN Xiangli2，WANG Guodong1，GUO Enmian1 ， XIN Zhaozhe1，TAN Jiabo1 （1.School of Marine Science and Engineering，Qingdao Agricultural University，Qingdao 266lo9，China; 2.Fisheriescollege，OceanUniversityof China，Qingdao 266oo3，China）

Abstract：Low temperature，high salinityand other environments conditions willaffect the nitrification activity of microorganisms and reduce the removal of ammonia nitrogenand nitrite nitrogen inwater.A heterotrophic nitrifying bacterium CS-6 was isolated from the biofilters of coldwater fish recirculating aquaculture system and identified as Bacillus by 16S rRNA. The nitrogen removal characteristics of the later were studied. The results show that Strain CS ?-6 can achieve removal rates of 100% and 91.67% for ammonia nitrogen and nitrite nitrogen，respectively，within 72 hours.The removal rates for ammonia nitrogen and nitrite nitrogen can reach up to 100% and 99% ， respectively，at low temperatures of 15°C ，salinity ranging from 0‰ to 50‰ ， and pHlevels between 6 and 9. This indicates excelent cold resistance and salt一tolerance properties，demonstrating that Strain CS -6 has high water purification efficiency and broad application potential.

Key words：low temperature;halo一alkali tolerance;heterotrophic nitrifying bacteria;aquaculture water treatment

水產養(yǎng)殖活動產生的殘餌以及養(yǎng)殖動物的排泄物會導致養(yǎng)殖水體中的氨氮和亞硝酸氮升高[1]，高濃度的氨氮和亞硝酸氮會對養(yǎng)殖動物產生毒害[2]，因此，有效降低養(yǎng)殖水體中的氨氮和亞硝酸氮，維持良好的養(yǎng)殖水質環(huán)境，是保證養(yǎng)殖安全的基本要求。（剩余5871字）