Dual disintegration of microalgae biomass for cost-effective biomethane production: Energy and cost assessment.

Autor: Kannah Ravi Y; Centre for Organic and Nanohybrid Electronics, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland., Kavitha S; Department of Biotechnology, Karpagam Academy of Higher Education, Coimbatore, Tamil Nadu 641021, India., Al-Qaradawi SY; Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha P.O. Box 2713, Qatar., Rajesh Banu J; Department of Biotechnology, Central University of Tamil Nadu, Neelakudi, Thiruvarur 610005, Tamil Nadu, India. Electronic address: rajeshbanu@cutn.ac.in.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2024 May; Vol. 399, pp. 130630. Date of Electronic Publication: 2024 Mar 24.
DOI: 10.1016/j.biortech.2024.130630
Abstrakt: The present study aims to enhance the biomethane production potential of microalgae via a dual disintegration process. During this process, the microalgae biomass was firstly subjected to cell wall weakening by thermochemical disintegration (TC) (50 to 80 °C), pH adjustment with alkali, NaOH (6 to 10) and time (0 to 10 min) and, secondly, by bacterial disintegration (BD). TC-BD disintegration was comparatively higher (33 %) than BD (24 %), TC (8.5 %), and control (7 %). A more significant VFA accumulation of 2816 mg/L was recorded for TC-BD. Similarly, a greater substrate anaerobic biodegradability was achieved in TC-BD (0.32 g COD /g COD) than BD (0.21 g COD /g COD), TC alone (0.09 gCOD/g COD) and control (0.08 g COD /g COD), respectively. The TC-BD achieves a positive net profit and an energy ratio of + 0.12 GJ/d and 1.03. The proposed dual disintegration has a promising future for commercialization.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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