Nutrient removal and biogas upgrade using co-cultivation of Chlorella vulgaris and three different bacteria under various GR24 concentrations by induction with 5-deoxystrigol

Algae symbiosis technology shows great potential in the synchronous treatment of biogas slurry and biogas, which has promising applications. For improving nutrients and CO 2 removal rates, the present work constructed four microalgal systems: Chlorella vulgaris ( C. vulgaris ) monoculture, C. vulgar...

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Published in:World journal of microbiology & biotechnology 2023-09, Vol.39 (9), p.245-245, Article 245
Main Authors: Shu, Lixing, Li, Junfeng, Xu, Jun, Zheng, Zheng
Format: Article
Language:English
Subjects:
Activated sludge
Algae
Applied Microbiology
Aquatic microorganisms
Bacteria
Biochemistry
Biogas
Biomedical and Life Sciences
Biotechnology
Carbon dioxide
Carbon dioxide removal
Chemical oxygen demand
Chlorella
Chlorella vulgaris
Endophytes
Environmental Engineering/Biotechnology
Life Sciences
Microalgae
Microbiology
Monoculture
Nitrogen removal
Nutrient removal
Nutrients
Phosphorus removal
Slurries
Symbiosis
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Summary:Algae symbiosis technology shows great potential in the synchronous treatment of biogas slurry and biogas, which has promising applications. For improving nutrients and CO 2 removal rates, the present work constructed four microalgal systems: Chlorella vulgaris ( C. vulgaris ) monoculture, C. vulgaris— Bacillus licheniformis ( B. licheniformis ), C. vulgaris— activated sludge, and C. vulgaris— endophytic bacteria (S395-2) to simultaneously treat biogas as well as biogas slurry under GR24 and 5DS induction. Our results showed that the C. vulgaris— endophytic bacteria (S395-2) showed optimal growth performance along with photosynthetic activity under the introduction of GR24 (10 −9  M). Under optimal conditions, CO 2 removal efficiency form biogas, together with chemical oxygen demand, total phosphorus and total nitrogen removal efficiencies from biogas slurry reached 67.25 ± 6.71%, 81.75 ± 7.93%, 83.19 ± 8.32%, and 85.17 ± 8.26%, respectively. The addition of symbiotic bacteria isolated from microalgae can promote the growth of C. vulgaris , and the exogenous addition of GR24 and 5DS can strengthen the purification performance of the algae symbiosis to achieve the maximum removal of conventional pollutants and CO 2 .
ISSN:0959-3993
1573-0972
DOI:10.1007/s11274-023-03647-8