Waste paper and macroalgae co-digestion effect on methane production

The present study investigates the effect on methane production from waste paper when co-digested with macroalgal biomass. Both feedstocks were previously mechanically pretreated to reduce their particle size. The study was planned according two factors: the feedstock to inoculum (F/I) ratio and the...

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Bibliographic Details
Published in:Energy (Oxford) 2018-07, Vol.154, p.119-125
Main Authors: Rodriguez, Cristina, Alaswad, Abed, El-Hassan, Zaki, Olabi, Abdul G.
Format: Article
Language:English
Subjects:
Algae
Alternative energy
Anaerobic co-digestion
Biodegradability
Biodegradation
Biomass
Carbon/nitrogen ratio
Digestion
Inoculum
Methane
Mixing ratio
Raw materials
Renewable energy
Scrap
Substrates
Synergistic effect
Waste paper
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Summary:The present study investigates the effect on methane production from waste paper when co-digested with macroalgal biomass. Both feedstocks were previously mechanically pretreated to reduce their particle size. The study was planned according two factors: the feedstock to inoculum (F/I) ratio and the waste paper to macroalgae (WP/MA) ratio. The F/I ratios checked were 0.2, 0.3 and 0.4 and the WP/MA ratios were 0:100, 25:75, 50:50, 75:25 and 100:0. The highest methane yield (386 L kg−1 VSadded) was achieved at an F/I ratio of 0.2 and a WP/MA ratio of 50:50. A biodegradability index of 0.87 obtained in this study indicates complete conversion of feedstock at an optimum C/N ratio of 26. Synergistic effect was found for WP/MA 25:75, 50:50 and 75:25 mixing ratios compared with the substrates mono-digestion. •Pelvetia canaliculata was used as a feedstock for anaerobic co-digestion with waste paper.•Methane yield during co-digestion was 30% higher compared with mono-digestion.•Maximum biodegradability index of 0.87 achieved at C/N ratio of 26.•Synergistic effect was present for waste paper and macroalgae co-digestion.
ISSN:0360-5442
1873-6785
DOI:10.1016/j.energy.2018.04.115