Composition and biogas yield of a novel source segregation system for pig excreta

Phuong T. Vu, Roland W. Melse*, Grietje Zeeman, Peter W.G. Groot Koerkamp

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

Abstract

The performance of a novel source segregation method for pig excreta (a V-shaped conveyor belt underneath the slatted pen floor) was compared to conventional separation methods for pig slurry (screw press, centrifugation, flocculation with/without centrifugation). For the source segregation system, a larger amount of organic matter accumulated in the solid fraction (96%) than for conventional separation systems (34-93%). Also the dry matter content, nutrient content (total N and P), and methane production of this solid was higher than for the other systems. Furthermore the volumetric methane yield was much higher than for the solid fraction from the other separation systems (1.6 vs 0.8-1.0 m3 [CH4]·m-3 [reactor]·day-1 for a CSTR). Due to the high methane yield, digestion of the solid from source segregation is expected to require a considerable smaller reactor than for slurry digestion, which would increase the economic feasibility of mono-digestion systems for animal manure.

Original languageEnglish
Pages (from-to)29-38
JournalBiosystems Engineering
Volume145
DOIs
Publication statusPublished - 2016

Keywords

  • Biogas yield
  • Pig manure
  • Slurry separation
  • Source segregation

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