混合无机氮源下6株微藻对亚硝态氮、氨氮净化规律初探

doi:10.16378/j.cnki.1003-1111.2020.05.006

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Abstract The nitrite and ammonia removal patterns of 6 microalgal species or genera, including 3 diatoms, and 3 members in chlorophyto were primarily studied by analyzing the variation trend of cell density, nitrite concentration, and the ammonia concentration in the modified F/2 medium whose nitrogen source was the mixture of ammonia, nitrate and nitrite. The results showed that all microalgae grew very well and completed a whole growth cycle. In the initial stage of the growth cycle (2—3 d), each strain removed above 95% of the ammonia, with the maximal relative removal rate of 0.999 mg/(L·d) in Pyramimonas sp. KDN21 and the minimal relative removal rate of 0.639 mg/(L·d) in Amphora sp. KDN17. Most strains slowly removed a little nitrite (lower than 35%) during this stage, and their relative removal rates were not exceed 0.035 mg/(L·d); Amphora sp. KDN17 was the only microalga which sharply removed up to 65% of the nitrite, with relative removal rate of 0.322 mg/(L·d). In the middle to late stages of the growth cycle (3—6 d), their relative removal rates were lower than 0.020 mg/(L·d), although removed almost all NH⁺₄-N, all strains still removed a little nitrite. These findings indicated that the majority of microalga grew on the mixture inorganic nitrogen sources composed of ammonia, nitrate and nitrite removed massive ammonia, but a little nitrite. Amphora sp. KDN17 was the only one which removed massive ammonia and nitrite simultaneously, so as a probable candidate strain for controlling the water ammonia and nitrite concentration.

Key words： microalga nitrite nitrogen ammonia nitrogen mixed inorganic nitrogen source removing pattern

Received: 22 March 2019

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	Articles by authors
	GOU Wanli
	LI Ziying
	WU Xinhua
	WEN Shuangxi
	YANG Zhi

Cite this article:

GOU Wanli,LI Ziying,WU Xinhua, et al. Nitrite and Ammonia Removal Patterns of 6 Species or Genera of Microalgae Exposed to Mixed Inorganic Nitrogen[J]. Fisheries Science, 2020, 39(5): 685-693.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.2020.05.006 OR https://www.shchkx.com/EN/Y2020/V39/I5/685

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