1. Evaluation of ultrasonic, acid, thermo-alkaline and enzymatic pre-treatments on anaerobic digestion of Ulva rigida for biogas production.
- Author
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Karray R, Hamza M, and Sayadi S
- Subjects
- Acids chemistry, Alkalies chemistry, Anaerobiosis, Catalysis, Glucose radiation effects, Hot Temperature, Hydrolysis, Methane isolation & purification, Oxidation-Reduction, Sodium Hydroxide chemistry, Sonication, Sulfuric Acids chemistry, Ultrasonic Waves, Ulva radiation effects, Glucose chemistry, Glucose metabolism, Hydrolases chemistry, Methane biosynthesis, Ulva metabolism
- Abstract
Pre-treatment of macroalgae has received considerable research globally due to its influence on the technical, economic and environmental sustainability of algae biogas production. Some of the most promising pre-treatment methods require the application of chemicals, enzymatic, and mechanical. This study focused on these pre-treatments of Ulva rigida for biogas production. The evaluation of different pre-treatment in terms of reducing sugar yields demonstrates that 3.62, 2.88, 2.53 and 7.3g/L of reducing sugar was obtained in acid catalysis, thermoalkaline, ultrasonication and enzymatic pre-treatment, respectively. However in crude macroalgae only 0.6g/L of reducing sugar was given. After anaerobic digestion, the enzymatic hydrolysis was demonstrated the best biogas yield than other pre-treatment which reached 626.5mL/gCODint with 62.65% of biodegradability. The best demonstrated method which uses crude broth of Aspergillus niger showed an effective and environmentally friendly strategy for enhancing the biogas production yields after the anaerobic digestion., (Copyright © 2015 Elsevier Ltd. All rights reserved.)
- Published
- 2015
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