Photosynthesis Characterization of Mutant Algae and Enhanced Carbon Fixation of Algae–Bacteria Symbiosis Treating Municipal Wastewater

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY Fuel Cells Pub Date : 2024-08-02 DOI:10.1002/fuce.202400088

Pengsha Zhao, Xinying Liu, Zheng Wang, Jie Min, Yan Dang, Yu Hong, Dezhi Sun

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Abstract

Algae–bacteria symbiosis (ABS) as a sustainable wastewater treatment process has drawn mounting attention. However, nontrivial CO2 emissions were still present in municipal wastewater treatment due to the inadequate carbon fixation efficiency of microalgae under low carbon level. The obtained UV‐induced mutant Chlorella vulgaris MIHL4 performed higher carbon fixation capability (14.5%) and biomass productivity (25.3%) with improved photosynthetic fluorescence parameters and enzyme activities compared to wild‐type C. vulgaris. Transcriptome analyses showed pathways related to the carbon fixation and carbon catabolism were significantly up‐regulated in MIHL4. Compared with ABS inoculated with wild‐type C. vulgaris, CO2 emissions were significantly reduced by 32.1%–38.3% in ABS inoculated with MIHL4, where the biomass growth, metabolic activity, and sludge granulation were enhanced. Chlorella responsible for carbon fixation was the dominant population (19.3%) in ABS inoculated with MIHL4, in which the abundance of functional microbes and genes associated with photosynthesis as well as nutrient removal increased.

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突变藻类的光合作用特征及藻类与细菌共生处理城市污水的固碳能力的提高

藻菌共生（ABS）作为一种可持续的废水处理工艺已引起越来越多的关注。然而，在城市污水处理过程中，由于微藻在低碳水平下的碳固定效率不足，仍然存在不小的二氧化碳排放量。与野生型绿球藻相比，紫外线诱导的突变体绿球藻 MIHL4 具有更高的碳固定能力（14.5%）和生物量生产率（25.3%），光合荧光参数和酶活性也有所提高。转录组分析表明，与碳固定和碳分解相关的途径在 MIHL4 中显著上调。与接种了野生型小球藻的 ABS 相比，接种了 MIHL4 的 ABS 的二氧化碳排放量明显减少了 32.1%-38.3%，生物量增长、新陈代谢活性和污泥造粒能力均有所提高。在接种了 MIHL4 的 ABS 中，负责碳固定的小球藻是主要种群（19.3%），其中与光合作用和营养物质去除相关的功能微生物和基因的数量有所增加。

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来源期刊

Fuel Cells 工程技术-电化学

CiteScore

5.80

自引率

3.60%

发文量

审稿时长

3.7 months

期刊介绍： This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.