Upflow anaerobic solid-state (UASS) digestion of horse manure: Thermophilic vs. mesophilic performance

Janina Böske, Benjamin Wirth, Felix Garlipp, Jan Mumme, Herman Van den Weghe

Research output: Contribution to journalArticlepeer-review

Abstract

Energetic use of complex lignocellulosic wastes has gained global interest. Thermophilic digestion of horse manure based on straw was investigated using the upflow anaerobic solid-state (UASS) process. Increasing the organic loading rate from 2.5 to 5.5gvsL- 1d- 1 enhanced the average methane production rate from 0.387 to 0.687LCH4L- 1d- 1, whereas the yield decreased from 154.8 to 124.8LCH4kgvs - 1. A single-stage and two-stage process design showed almost the same performance. Compared to prior experiments at mesophilic conditions, thermophilic conditions showed a significantly higher efficiency with an increase of 59.8% in methane yield and 58.1% in methane production rate. Additional biochemical methane potential (BMP) tests with two types of horse manure and four different bedding materials showed that wheat straw obtained the highest BMP. The results show that the thermophilic UASS process can be the key to an efficient energy recovery from straw-based manures.

Original languageEnglish
Pages (from-to)8-16
Number of pages9
JournalBioresource technology
Volume175
Early online date18 Oct 2014
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Bedding materials
  • Horse manure
  • Solid-state anaerobic digestion
  • Thermophilic
  • UASS

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