Biogas slurry treatment and biogas upgrading by microalgae-based systems under the induction of different phytohormones.

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING Bioresource Technology Pub Date : 2024-10-02 DOI:10.1016/j.biortech.2024.131569

Zhengfang Wang, QiaoLi Wang, Bei Lu, Chunzhi Zhao, Wenbo Chai, Zijuan Huang, PeiYing Li, Yongjun Zhao

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Abstract

The low grade of biogas and the difficulty of treating biogas slurry are the two major bottlenecks limiting the sustainable development of the fermentation engineering. This study investigates the potential role of microalgae-microbial symbiosis and phytohormones in solving this challenge. Chlorella microalgae were combined with endophytic bacteria (S395-2) and Clonostachys fungus to construct symbiotic systems. Growth, photosynthetic activity, and carbon dioxide and pollutant removal out of biogas slurry and biogas were analyzed under treatment with three different phytohormones (cytokinin, synthetic strigolactones (GR24), natural strigolactones). The Chlorella-S395-2-Clonostachys symbiont achieved the highest purification efficiency under GR24 induction, with removal efficiency exceeding 86% for chemical oxygen demand, total phosphorous, and total nitrogen, as well as over 76% for CO₂. Economic efficiency can be increased by about 150%. The positive correlation between treatment effectiveness and co-culture performance suggests a promising avenue for developing symbiotic systems for biogas slurry treatment and biogas upgrading.

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微藻系统在不同植物激素诱导下的沼气泥浆处理和沼气升级。

沼气品位低和沼气浆难以处理是限制发酵工程可持续发展的两大瓶颈。本研究探讨了微藻-微生物共生和植物激素在解决这一难题中的潜在作用。小球藻与内生细菌（S395-2）和克隆氏真菌结合构建共生系统。在使用三种不同的植物激素（细胞分裂素、合成糙内酯（GR24）、天然糙内酯）处理的情况下，分析了沼气浆和沼气的生长、光合作用活性、二氧化碳和污染物的去除。在 GR24 诱导下，Chlorella-S395-2-Clonostachys 共生体的净化效率最高，化学需氧量、总磷和总氮的去除率超过 86%，二氧化碳的去除率超过 76%。经济效益可提高约 150%。处理效果与共培养性能之间的正相关性表明，开发沼气泥浆处理和沼气升级共生系统是一条大有可为的途径。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.