Mitigation of greenhouse gases (CO2) generated in the anaerobic digestion of physicochemical sludges using airlift photobioreactors operated with Chlorella spp

The aim of this study was to evaluate the mitigation of greenhouse gasses generated in the anaerobic digestion process of physicochemical sludges by evaluating the effect of CO 2 supply and light intensity requirements on the growth of microalga Chlorella spp. and measuring the consumption of CO 2 ....

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Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2019-04, Vol.54 (5), p.427-434
Main Authors: Caballero-García, Margarita, Cortés-Robles, Guillermo, Herrera-Yáñez, María Betsabé, Alvarado-Lassman, Alejandro, Manuel Méndez-Contreras, Juan
Format: Article
Language:English
Subjects:
Airlifts
Anaerobic digestion
Anaerobic processes
Anaerobiosis
Biofuels - analysis
Biogas
Biomass
Carbon dioxide
Carbon Dioxide - analysis
Chlorella
Chlorella - growth & development
Chlorella spp
Electric generators
Greenhouse effect
Greenhouse gases
Greenhouse Gases - analysis
greenhouse gases mitigation
Light intensity
Luminous intensity
Mitigation
photobioreactor
Photobioreactors
Photobioreactors - microbiology
Refuse as fuel
removal
Sewage - chemistry
Sludge
Sludge digestion
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Summary:The aim of this study was to evaluate the mitigation of greenhouse gasses generated in the anaerobic digestion process of physicochemical sludges by evaluating the effect of CO 2 supply and light intensity requirements on the growth of microalga Chlorella spp. and measuring the consumption of CO 2 . The best conditions at a laboratory scale were performed in an airlift photobioreactor (PBR) at pilot-scale plant (26 L) during 60 days with a CO 2 supply of 2% v v −1 from an electric generator coupled to an anaerobic digestion of physicochemical sludge process. The maximum %CO 2 consumed was 91.92% which was reached in the seventh supply cycle and biomass production was 2.18 g L −1 . The results obtained showed that airlift-type PBRs are a suitable complement for anaerobic digestion of physicochemical sludge technologies in order to reduce emissions of greenhouse gases produced during the combustion of biogas.
ISSN:1093-4529
1532-4117
DOI:10.1080/10934529.2018.1562809