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Selected Publication:

Wang, XM; Gabauer, W; Li, ZF; Ortner, M; Fuchs, W.
(2018): Improving exploitation of chicken manure via two-stage anaerobic digestion with an intermediate membrane contactor to extract ammonia
BIORESOURCE TECHNOL. 2018; 268: 811-814. FullText FullText_BOKU

This study describes a modified process of ammonia release through pre-hydrolysis - ammonia removal via membrane contactor - methanization for counteracting ammonia inhibition in anaerobic digestion of chicken manure. In the pre-hydrolysis step, ammonia was rapidly released within the first 3-5 days. 78%-83% of the total nitrogen was finally converted into total ammonia/ammonium (TAN) with volatile fatty acids concentration of approximately 300 g/kg-VS. In the ammonia removal process, diluting the hydrolyzed chicken manure to 1:2, the TAN could be reduced to 2 g/kg in 21 h when pH was increased to 9. The final BMP WA of chicken manure verified that lower TAN concentration (decreased to 2 g/kg) significantly reduced inhibitory effects, obtaining a high methane yield of 437.0 mL/g.VS. The investigations underlined several advantages of this modified process.
Authors BOKU Wien:
Fuchs Werner
Gabauer Wolfgang
Ortner Markus

Find related publications in this database (Keywords)
Ammonia extraction
Membrane contactor
Chicken manure
Ammonia inhibition
Two-stage anaerobic digestion

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