Guangyu Chu, Qianzhi Wang, Chenguang Song, Jiateng Liu, Yangguo Zhao, Shuailing Lu, Zhiming Zhang, Chunji Jin, Mengchun Gao
Bioresource technology 2023 MarThe nitrogen removal performance and biological mechanism of Platymonas helgolandica var. Tsingtaoensis (P. helgolandica) were investigated in treating mariculture wastewater under different light: dark (L:D) photoperiods. The growth of P. helgolandica was positively correlated with the photoperiods from 6L:18D to 15L:9D, and the highest photosynthetic activity appeared under 6L:18D photoperiod on day 3. P. helgolandica exhibited the highest removal efficiencies of total nitrogen and COD at 89 % and 93 % under 15L:9D photoperiod, respectively. NH4+-N assimilation was proportional to the photoperiods from 6L:18D to 15L:9D and longer illumination promoted NO2--N removal. However, the highest NO3--N reduction rate was achieved under 12L:12D photoperiod. The different nitrogen-transformed enzymatic activities were affected by photoperiod. Transcriptome revealed that unigenes were enriched in nitrogen metabolism and photosynthesis pathways, of which the functional gene expression was up-regulated significantly. This study provides insights into the optimization of photoperiod for mariculture wastewater treatment by P. helgolandica. Copyright © 2023 Elsevier Ltd. All rights reserved.
Guangyu Chu, Qianzhi Wang, Chenguang Song, Jiateng Liu, Yangguo Zhao, Shuailing Lu, Zhiming Zhang, Chunji Jin, Mengchun Gao. Platymonas helgolandica-driven nitrogen removal from mariculture wastewater under different photoperiods: Performance evaluation, enzyme activity and transcriptional response. Bioresource technology. 2023 Mar;372:128700
PMID: 36738978
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