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Piringer, Gerhard
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Official Name
Piringer, Gerhard
Main Affiliation
Akademische Titel
DI, Ph.D.
Email
gerhard.piringer@fh-burgenland.at
ORCID
Scopus Author ID
23095387800
Status
staff
Research Outputs
Now showing 1 - 10 of 33
- PublicationReevaluation of energy use in wheat production in the United StatesEnergy budgets for agricultural production can be used as building blocks for life‐cycle assessments that include agricultural products, and can also serve as a first step toward identifying crop production processes that benefit most from increased efficiency. A general trend toward increased energy efficiency in U.S. agriculture has been reported. For wheat cultivation, in particular, this study updates cradle‐to‐gate process analyses produced in the seventies and eighties. Input quantities were obtained from official U.S. statistics and other sources and multiplied by calculated or recently published energy coefficients. The total energy input into the production of a kilogram of average U.S. wheat grain is estimated to range from 3.1 to 4.9 MJ/kg, with a best estimate at 3.9 MJ/kg. The dominant contribution is energy embodied in nitrogen fertilizer at 47% of the total energy input, followed by diesel fuel (25%), and smaller contributions such as energy embodied in seed grain, gasoline, electricity, and phosphorus fertilizer. This distribution is reflected in the energy carrier mix, with natural gas dominating (57%), followed by diesel fuel (30%). High variability in energy coefficients masks potential gains in total energy efficiency as compared to earlier, similar U.S. studies. Estimates from an input‐output model for several input processes agree well with process analysis results, but the model's application can be limited by aggregation issues: Total energy inputs for generic food grain production were lower than wheat fertilizer inputs alone, possibly due to aggregation of diverse products into the food grain sector.
42 2Scopus© Citations 61 - PublicationErratum to: Effects of the Antibiotics Chlortetracycline and Enrofloxacin on the Anaerobic Digestion in Continuous Experiments(Bioenerg. Res., (2014), DOI 10.1007/s12155-014-9458-0)(Springer, 2016)
; Winckler, ChristophThe original version of this article unfortunately contained mistakes in the authorship. The author’s name, “ Christoph Winckler ” as the 10th author, is missing. The correct version is presented above.68 1Scopus© Citations 1 - PublicationTransport characteristics of nanoscale functional zerovalent iron/silica composites for in situ remediation of trichloroethylene(American Chemical Society, 2008)
; 48 1Scopus© Citations 172 - PublicationDelivery and targeting of functional aerosol particle in DNAPL remediation(American Chemical Society, 2008)
; 49 1 - PublicationLife Cycle Assessment of Biogas Production from Unused Grassland Biomass Pretreated by Steam Explosion Using a System Expansion Method(MDPI, 2020)
; 140 1Scopus© Citations 6 - PublicationMultifunctional iron-carbon nanocomposites through an aerosol-based process for the in situ remediation of chlorinated hydrocarbons(American Chemical Society, 2011)
; John, Vijay T.Spherical iron-carbon nanocomposites were developed through a facile aerosol-based process with sucrose and iron chloride as starting materials. These composites exhibit multiple functionalities relevant to the in situ remediation of chlorinated hydrocarbons such as trichloroethylene (TCE). The distribution and immobilization of iron nanoparticles on the surface of carbon spheres prevents zerovalent nanoiron aggregation with maintenance of reactivity. The aerosol-based carbon microspheres allow adsorption of TCE, thus removing dissolved TCE rapidly and facilitating reaction by increasing the local concentration of TCE in the vicinity of iron nanoparticles. The strongly adsorptive property of the composites may also prevent release of any toxic chlorinated intermediate products. The composite particles are in the optimal range for transport through groundwater saturated sediments. Furthermore, those iron-carbon composites can be designed at low cost, the process is amenable to scale-up for in situ application, and the materials are intrinsically benign to the environment.52 1Scopus© Citations 74 - PublicationImplementing an advanced waste separation step in an MBT plant: assessment of technical, economic and environmental impacts(Sage, 2013-06-23)
; ; ; ; Heavy fractions resulting from mechanical treatment stages of mechanical–biological waste treatment plants are posing very specific demands with regard to further treatment (large portions of inert and high-caloric components). Based on the current Austrian legal situation such a waste stream cannot be landfilled and must be thermally treated. The aim of this research was to evaluate if an inert fraction generated from this waste stream with advanced separation technologies, two sensor-based [near-infrared spectroscopy (NIR), X-ray transmission (XRT)] and two mechanical systems (wet and dry) is able to be disposed of. The performance of the treatment options for separation was evaluated by characterizing the resulting product streams with respect to purity and yield. Complementing the technical evaluation of the processing options, an assessment of the economic and global warming effects of the change in waste stream routing was conducted. The separated inert fraction was evaluated with regard to landfilling. The remaining high-caloric product stream was evaluated with regard to thermal utilization. The results show that, in principal, the selected treatment technologies can be used to separate high-caloric from inert components. Limitations were identified with regard to the product qualities achieved, as well as to the economic expedience of the treatment options. One of the sensor-based sorting systems (X-ray) was able to produce the highest amount of disposeable heavy fraction (44.1%), while having the lowest content of organic (2.0% Cbiogenic per kg waste input) components. None of the high-caloric product streams complied with the requirements for solid recovered fuels as defined in the Austrian Ordinance on Waste Incineration. The economic evaluation illustrates the highest specific treatment costs for the XRT (€23.15 per t), followed by the NIR-based sorting system (€15.67 per t), and the lowest costs for the air separation system (€10.79 per t). Within the ecological evaluation it can be shown that the results depend strongly on the higher heating value of the high caloric light fraction and on the content of Cbiogenic of the heavy fraction. Therefore, the XRT system had the best results for the overall GWP [−14 kg carbon dioxide equivalents (CO2eq) per t of input waste] and the NIR-based the worst (193 kg CO2 eq per t of input waste). It is concluded that three of the treatment options would be suitable under the specific conditions considered here. Of these, sensor-based sorting is preferable owing to its flexibility.177 1Scopus© Citations 2 - PublicationEffects of working depth and wheel slip on fuel consumption of selected tillage implements(International Commission of Agricultural Engineering, 2014)
; 57 1 - PublicationTransport and partitioning of functional aerosol nanoparticles for remediation of trichloroethylene(AIChE, 2007-11-05)
; 39 1 - PublicationEnvironmental hot spot analysis in agricultural lifecycle assessments – three case studies(University of Zagreb, 2016)
; Scopus© Citations 5 82 1