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Full-Text Articles in Engineering
An Investigation Of The Potential Adoption Of Anaerobic Digestion For Energy Production In Irish Farms, Niamh Power, Sean O'Connor, Ehiaze Ehimen, Suresh C. Pillai, Gary A. Lyons, John Bartlett
An Investigation Of The Potential Adoption Of Anaerobic Digestion For Energy Production In Irish Farms, Niamh Power, Sean O'Connor, Ehiaze Ehimen, Suresh C. Pillai, Gary A. Lyons, John Bartlett
Publications
Anaerobic digestion (AD) has been recognised as an effective means of simultaneously producing energy while reducing greenhouse gas (GHG) emissions. Despite having a large agriculture sector, Ireland has experienced little uptake of the technology, ranking 20th within the EU-28. It is, therefore, necessary to understand the general opinions, willingness to adopt, and perceived obstacles of potential adopters of the technology. As likely primary users of this technology, a survey of Irish cattle farmers was conducted to assess the potential of on-farm AD for energy production in Ireland. The study seeks to understand farmers’ motivations, perceived barriers, and preferred business model. …
Enhancing Anaerobic Digestion Of Food Waste Through Biochemical Methane Potential 1 Assays At Different Substrate: Inoculum Ratios, Shakira R. Hobbs, Amy E. Landis, Bruce E. Rittmann, Michelle N. Young, Prathap Parameswaran
Enhancing Anaerobic Digestion Of Food Waste Through Biochemical Methane Potential 1 Assays At Different Substrate: Inoculum Ratios, Shakira R. Hobbs, Amy E. Landis, Bruce E. Rittmann, Michelle N. Young, Prathap Parameswaran
Publications
Food waste has a high energy potential that can be converted into useful energy in the form of methane via anaerobic digestion. Biochemical Methane Potential assays (BMPs) were conducted to quantify the impacts on methane production of different ratios of food waste. Anaerobic digester sludge (ADS) was used as the inoculum, and BMPs were performed at food waste:inoculum ratios of 0.42, 1.42, and 3.0 g chemical oxygen demand/g volatile solids (VS). The 1.42 ratio had the highest CH4-COD recovery: 90% of the initial total chemical oxygen demand (TCOD) was from food waste, followed by ratios 0.42 and 3.0 at 69% …
Modelling Methane Production Kinetics Of Complex Poultry Slaughterhouse Wastes Using Sigmoidal Growth Functions, Niamh Power, Aidan Ware
Modelling Methane Production Kinetics Of Complex Poultry Slaughterhouse Wastes Using Sigmoidal Growth Functions, Niamh Power, Aidan Ware
Publications
The kinetic evaluation of the methane potential from poultry slaughterhouse waste streams was performed using modified sigmoidal bacterial growth curve equations (Richards, logistic, Gompertz) in order to investigate their suitability to describe the degradation patterns associated with complex substrates, primarily composed of fats. The methane potential and degradation patterns under mesophilic conditions were assessed using Biochemical Methane Potential (BMP) assays. A nonlinear least-square regression analysis was performed to fit the sigmoidal functions to the cumulative methane production curves with respect to time generated from the BMP assays. In the cases modelled the Gompertz and logistic, three parameter models, sufficiently …
Biogas From Cattle Slaughterhouse Waste: Energy Recovery Towards An Energy Self-Sufficient Industry In Ireland, Niamh Power, Aidan Ware
Biogas From Cattle Slaughterhouse Waste: Energy Recovery Towards An Energy Self-Sufficient Industry In Ireland, Niamh Power, Aidan Ware
Publications
This study was carried out to assess the energy recovery potential from organic industrial by-products of a cattle slaughtering facility. There are several processes to convert organic material to energy; the technology of interest in this study was anaerobic digestion, the biological conversion of degradable organic material into methane. The scenario was initially confined to a full scale cattle slaughtering facility processing 3.28% of heads slaughtered in Ireland. The methane potential of dissolved air flotation sludge, paunch, soft offal as well as a mixed waste stream (combination of individual waste streams) was determined through a series of biochemical methane …
What Is The Effect Of Mandatory Pasteurisation On The Biogas Transformation Of Solid Slaughterhouse Wastes?, Niamh Power, Aidan Ware
What Is The Effect Of Mandatory Pasteurisation On The Biogas Transformation Of Solid Slaughterhouse Wastes?, Niamh Power, Aidan Ware
Publications
The effect of mandatory pasteurisation on Category 3 offals, according to the Animal By-Products Regulation (ABPR 1069/2009/EC), was determined using Biochemical Methane Potential (BMP) assays as well as kinetic and statistical analysis. Pasteurised and unpasteurised offals sampled from cattle, pig and chicken slaughterhouses were characterised and their specific methane yields (SMYs) and their bioavailability was assessed. The resultant SMYs were high (465–650 mLCH4 gVS−1) with no statistically significant increase in methane production identified due to pasteurisation. However, the kinetics of the biogas transformation processes highlighted increased bioavailability of the organics due to pasteurisation. This was brought to …