Next Article in Journal
New TA Index-Based Rollover Prevention System for Electric Vehicles
Next Article in Special Issue
The Impact of a Mild Sub-Critical Hydrothermal Carbonization Pretreatment on Umbila Wood. A Mass and Energy Balance Perspective
Previous Article in Journal
Energy’s Shadow Price and Energy Efficiency in China: A Non-Parametric Input Distance Function Analysis
Previous Article in Special Issue
Changes in Carbon Electrode Morphology Affect Microbial Fuel Cell Performance with Shewanella oneidensis MR-1
Article Menu

Export Article

Open AccessArticle
Energies 2015, 8(3), 1990-2007; doi:10.3390/en8031990

Impact of Organic Loading Rate on Psychrophilic Anaerobic Digestion of Solid Dairy Manure

Dairy and Swine Research and Development Center, Agriculture and Agri-Food Canada, Sherbrooke, QC J1M 0C8, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Thomas E. Amidon
Received: 21 November 2014 / Revised: 24 February 2015 / Accepted: 3 March 2015 / Published: 13 March 2015
(This article belongs to the Collection Bioenergy and Biofuel)
View Full-Text   |   Download PDF [522 KB, uploaded 17 March 2015]   |  

Abstract

Increasing the feed total solids to anaerobic digester improves the process economics and decreases the volume of liquid effluent from current wet anaerobic digestion. The objective of this study was to develop a novel psychrophilic (20 °C) anaerobic digestion technology of undiluted cow feces (total solids of 11%–16%). Two sets of duplicate laboratory-scale sequence batch bioreactors have been operated at organic loading rates (OLR) of 6.0 to 8.0 g total chemical oxygen demand (TCOD) kg−1 inoculum day−1 (d−1) during 210 days. The results demonstrated that the process is feasible at treatment cycle length (TCL) of 21 days; however, the quality of cow feces rather than the OLR had a direct influence on the specific methane yield (SMY). The SMY ranged between 124.5 ± 1.4 and 227.9 ± 4.8 normalized liter (NL) CH4 kg−1 volatile solids (VS) fed d−1. Substrate-to-inoculum mass ratio (SIR) was 0.63 ± 0.05, 0.90 ± 0.09, and 1.06 ± 0.07 at OLR of 6.0, 7.0, and 8.0 g TCOD kg−1 inoculum d−1, respectively. No volatile fatty acids (VFAs) accumulation has been observed which indicated that hydrolysis was the rate limiting step and VFAs have been consumed immediately. Bioreactors performance consistency in terms of the level of SMYs, VFAs concentrations at end of the TCL, pH stability and volatile solids reduction indicates a stable and reproducible process during the entire operation. View Full-Text
Keywords: psychrophilic; dry anaerobic digestion; high-solids content; cow manure psychrophilic; dry anaerobic digestion; high-solids content; cow manure
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Saady, N.M.C.; Massé, D.I. Impact of Organic Loading Rate on Psychrophilic Anaerobic Digestion of Solid Dairy Manure. Energies 2015, 8, 1990-2007.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top