4.8 Article

Methane production from horse manure and stall waste with softwood bedding

Journal

BIORESOURCE TECHNOLOGY
Volume 112, Issue -, Pages 42-50

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.02.012

Keywords

Stall waste; Horse manure; Softwood bedding; Anaerobic digestion; Methane potential

Funding

  1. Rutgers Equine Science Center's State Equine Initiative
  2. New Jersey Agricultural Experiment Station
  3. USDA CSREES Region 2 - NJ Water Resources Research Institute
  4. staff of the Rutgers Equine Science Center

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Substantial stall waste is generated from horses on softwood bedding. The methane potential (G(pot)) of horse manure and constructed mixtures of stall waste with softwood bedding was determined at 35 degrees C. G(por) of 68, 191 and 273 mL/g volatile solids (VS) were estimated for three separate batches of horse manure, indicating variability in the material. Cumulative energy production over 20-40 days ranged from 3.11 +/- 0.92 to 8.45 +/- 5.42 x 10(5) kJ/metric ton wet weight horse manure alone, and from 1.69 +/- 0.39 to 3.91 +/- 0.47 x 10(5) kJ/metric ton wet weight horse manure plus softwood stall bedding (mixed at a 1:1 ratio on a VS basis). Softwood bedding was barely degradable and diluted the energy production of the stall waste; however, it did not cause inhibition of methane production from manure. Manually separated used softwood bedding contained substantial methane potential. (C) 2012 Elsevier Ltd. All rights reserved.

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