Effects of Co and Ni nanoparticles on biogas and methane production from anaerobic digestion of slurry

•The addition of trace metals in form of nanoparticles reduced the lag phase.•Nanoparticles reduced time to achieve the highest biogas and methane production.•Biogas and methane production were proportional to nanoparticles concentration.•Nanoparticles biostimulate the methanogenic bacteria and incr...

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Bibliographic Details
Published in:Energy conversion and management 2017-06, Vol.141, p.108-119
Main Authors: Abdelsalam, E., Samer, M., Attia, Y.A., Abdel-Hadi, M.A., Hassan, H.E., Badr, Y.
Format: Article
Language:English
Subjects:
Additives
Anaerobic digestion
Anaerobic processes
Biogas
Chemical additives
Cobalt
Digesters
Manure management
Methane
Methane production
Nanoparticles
Nanotechnology
Nickel
Salts
Slurries
Slurry treatment
Statistical analysis
Trace metals
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Summary:•The addition of trace metals in form of nanoparticles reduced the lag phase.•Nanoparticles reduced time to achieve the highest biogas and methane production.•Biogas and methane production were proportional to nanoparticles concentration.•Nanoparticles biostimulate the methanogenic bacteria and increase their activity. Nanoparticles (NPs) were hypothesized to enhance the anaerobic process and to accelerate the slurry digestion, which increases the biogas and methane production. The effects of NPs on biogas and methane production were investigated using a specially designed batch anaerobic system. For this purpose, a series of 2L biodigesters were manufactured and implemented to study the effects of Cobalt (Co) and Nickel (Ni) nanoparticles with different concentrations on biogas and methane production. The best results of NPs additives were determined based on the statistical analysis (Least Significant Difference using M-Stat) of biogas and methane production, which were 1mg/L Co NPs and 2mg/L Ni NPs (p
ISSN:0196-8904
1879-2227
DOI:10.1016/j.enconman.2016.05.051