Biodegradation of Synthetic Organic Compounds by Methanogenic Microbiome as an Alternative Approach for Wastewater Purification and Energy Production

Iryna Bida, Oleksandra Shabliy, Olesia Havryliuk, Vira Hovorukha, Galina Gladka, Larysa Yastremska, Antonina Kalinichenko (), Daniel Janecki and Oleksandr Tashyrev
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Iryna Bida: Department of Extremophilic Microorganisms Biology, Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, 03143 Kyiv, Ukraine
Oleksandra Shabliy: Department of Industrial Biotechnology and Biopharmacy, Faculty of Biotechnology and Biotechnics, Igor Sikorsky Kyiv Polytechnic Institute, 03056 Kyiv, Ukraine
Olesia Havryliuk: Department of Extremophilic Microorganisms Biology, Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, 03143 Kyiv, Ukraine
Vira Hovorukha: Department of Extremophilic Microorganisms Biology, Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, 03143 Kyiv, Ukraine
Galina Gladka: Department of Extremophilic Microorganisms Biology, Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, 03143 Kyiv, Ukraine
Larysa Yastremska: Department of Biotechnology, Faculty of Environmental Safety, Engineering and Technologies, National Aviation University, 03058 Kyiv, Ukraine
Antonina Kalinichenko: Institute of Environmental Engineering and Biotechnology, University of Opole, 45-040 Opole, Poland
Daniel Janecki: Institute of Environmental Engineering and Biotechnology, University of Opole, 45-040 Opole, Poland
Oleksandr Tashyrev: Department of Extremophilic Microorganisms Biology, Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, 03143 Kyiv, Ukraine

Energies, 2022, vol. 15, issue 18, 1-13

Abstract: The use of fossil fuels (methane, oil, etc.) is undergoing an unprecedented crisis now. There is the urgent need to search for alternative energy sources. A wide range of degraded organic materials can be effectively used to provide energy together with environmental protection. Soapstock is a hazardous waste containing a high concentration of toxic organic compounds of man-made origin (fatty acids, surfactants, dyes, etc.). To prevent environmental contamination such substances require an effective treatment approach. The goal of the study was to isolate the adapted-to-fatty-acids methanogenic microbiome and investigate the patterns of sodium acetate and soapstock degradation with simultaneous biomethane synthesis. The effectiveness of the degradation of sodium acetate and soapstock by non-adapted and adapted microbiomes was evaluated by decreasing the concentration of dissolved organic compounds. The effectiveness of the fermentation process was determined by the biogas (mixture of CH 4 and CO 2 ) yield. The most effective degradation occurred in the variant with sodium acetate and adapted methanogens and amounted to 77.9%. In other variants, the patterns and the efficiency of purification were similar ranging from 60.6 to 68.0%. The biomethane was mostly synthesized by adapted methanogens on the soapstock and sodium acetate as substrates. Thus, the CH 4 yield was 368.4 L/kg of dissolved organic compounds or 127.5 L/kg of soapstock. The results of this study demonstrated the potential of methanogenic microorganisms in the biodegradation of soapstock with simultaneous biogas synthesis. The results can serve as a basis to reduce the reliance on fossil fuels by generating biomethane via the fermentation of toxic organics.

Keywords: environment protection; energy carriers; soapstock; fatty acids; sodium acetate; methane fermentation; organic waste degradation; wastewater purification (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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