View graph of relations

Swine manure mono-digestion often results to economically non-feasible processes, due to the high dilution and ammonia concentration together with the low degradation rates it presents. The effects of different parameters of Aqueous Ammonia Soaking (AAS) as a pretreatment for improving the digestion of manure fibers when coupled to an ammonia removal step were investigated in this study. Response Surface Methodology was followed and the influence and interactions of the following AAS parameters were studied: NH3 concentration, duration and solid-to-liquid ratio. The mild conditions found to be optimal (7% w/w NH3, 96 hours, and 0.16 kg/l) in combination to a significant increase of the short term CH4 yield (244% in 17 days), make this pretreatment a promising solution for improving swine manure mono-digestion. Furthermore, compositional analysis of the manure fibers revealed significant solubilization of hemicellulose, while no lignin removal or loss of cellulose occurred under optimal conditions.
Original languageEnglish
JournalBioresource Technology
Pages (from-to)509-516
StatePublished - 2017

Bibliographical note

© 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (

CitationsWeb of Science® Times Cited: 2

    Research areas

  • Anaerobic digestion, Aqueous ammonia soaking, Response surface methodology, Manure, Pretreatment
Download as:
Download as PDF
Select render style:
Download as HTML
Select render style:
Download as Word
Select render style:

Download statistics

No data available

ID: 134225556