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

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  • No Thumbnail Available
    Publication
    Effizienzvergleich von automatischen Lenksystemen mit manueller Lenkung während der Grünlandernte auf Basis von Prozessparametern der Zugmaschine
    (Gesellschaft für Informatik e.V., 2017)
    Kral, Iris 
    ;
    Mauch, Marie 
    ;
    Barta, Norbert 
    ;
    Piringer, Gerhard 
    ;
    Bauer, Alexander 
    ;
    Bauerdick, Josef 
    ;
    Bernhardt, Heinz 
    ;
    Gronauer, Andreas 
    Der Nutzen von automatischen Lenksystemen wurde bisher vor allem im Ackerbau untersucht. In der vorliegenden Studie soll daher der Nutzen zwischen manueller Lenkung (mL) und automatischer Lenkung (aL) in der Grünlandwirtschaft durch Feldversuche verglichen werden. Die Prozessparameter wurden aus CANund ISO-Bus der Zugmaschine während des Mähens, Wendens und Schwadens erfasst. Die größten Abweichungen zwischen mL und aL wurden im Bereich der Feldarbeitszeit beobachtet. Hier war die Bearbeitung mit aL im Mittel 42,6% während des Mähens und 30,0% während des Wendens langsamer als mit mL. Neben unterschiedlichen Fahrstrategien war dieser Umstand auf einen mangelhaften Wechsel von mL auf aL nach der Wende zurückzuführen. Im Gegensatz dazu konnte mit der aL während des Schwadens um 15,6% schneller gearbeitet werden als mit mL. Dies ist auf einen Wendevorgang mittels Schwalbenschwanzwende während mL zurückzuführen.
      74  1
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    Publication
    Trichloroethylene remediation using nanoscale iron/silica aerosol particles
    (American Chemical Society, 2007)
    Zheng, Tonghua 
    ;
    Zhan, Jingjing 
    ;
    He, Jibao 
    ;
    Piringer, Gerhard 
    ;
    McPherson, Gary L. 
    ;
    Lu, Yunfeng 
    ;
    John, Vijay T. 
      44  1
  • No Thumbnail Available
    Publication
    Life Cycle Assessment of Biogas Production from Unused Grassland Biomass Pretreated by Steam Explosion Using a System Expansion Method
    (MDPI, 2020)
    Kral, Iris 
    ;
    Piringer, Gerhard 
    ;
    Saylor, Molly K. 
    ;
    Lizasoain, Javier 
    ;
    Gronauer, Andreas 
    ;
    Bauer, Alexander 
    Reforestation is a threat to permanent grasslands in many alpine regions. Using these areas to produce biogas energy may help to preserve these important landscapes and save fossil fuels by adding a renewable local heat and electricity source. This case study compares (a) a status quo (SQ) reference scenario with heating oil, wood-chips, and grid electricity as municipal energy sources, and (b) a hypothetical local biogas (LB) scenario (to also be used as a municipal energy source) based on a 500-kWel biogas plant with steam explosion pretreatment. Here, hay from previously unused grassland is the main biogas substrate, whereas, in the reference SQ scenario, these grasslands remain unused. Life cycle assessment (LCA) results for LB and SQ scenarios are significantly different at p < 0.05 in all six impact categories. In three categories, the LB scenario has lower impacts than the SQ scenario, including climate change (0.367 CO2-eq kWhel-1 versus 0.501 CO2-eq kWhel-1). Dominant contributions to climate change in the SQ scenario are from the extant municipal energy sources that the LB biogas plant would replace; in the LB scenario, important contributions include unburned methane from the biogas plant, as well as CO2 emissions from hay production machines. In summary, important environmental impacts can be reduced and alpine grasslands can be preserved by biogas production from that grass. The advantages of integrating a local biogas plant in municipal energy and waste systems depend strongly on the extant municipal energy system characteristics.
      140  1Scopus© Citations 6
  • No Thumbnail Available
    Publication
    Reductive dehalogenation of trichloroethylene using aerosol-assisted Fe/Silica particles
    (American Chemical Society, 2008)
    Zhan, Jingjing 
    ;
    Zheng, Tonghua 
    ;
    Piringer, Gerhard 
    ;
    Day, Christopher 
    ;
    He, Jibao 
    ;
    McPherson, Gary L. 
    ;
    Lu, Yunfeng 
    ;
    John, Vijay T. 
      38  1
  • No Thumbnail Available
    Publication
    Geostatistical modeling and mapping of sediment contaminant concentrations
    (2005)
    Ramanitharan, Kandiah 
    ;
    Steinberg, Laura J. 
    ;
    Piringer, Gerhard 
      52  1Scopus© Citations 4
  • No Thumbnail Available
    Publication
    Delivery and targeting of functional aerosol particle in DNAPL remediation
    (American Chemical Society, 2008)
    Zhan, Jingjing 
    ;
    Day, Christopher 
    ;
    Piringer, Gerhard 
    ;
    McPherson, Gary L. 
    ;
    Lu, Yunfeng 
    ;
    Papadopoulos, Kyriakos D. 
    ;
    John, Vijay T. 
      49  1
  • No Thumbnail Available
    Publication
    Land use and land use change in agricultural life cycle assessments and carbon footprints - The case for regionally specific land use change versus other methods
    (Elsevier, 2014)
    Hörtenhuber, Stefan 
    ;
    Piringer, Gerhard 
    ;
    Zollitsch, Werner 
    ;
    Lindenthal, Thomas 
    ;
    Winiwarter, Wilfried 
    The supply chain of a product is essential for understanding its environmental impacts. As parts of agricultural product supply chains, land use (LU) and land use change (LUC) are considered to be major contributors to global CO2 emissions. Nevertheless, LU and LUC (LULUC) are rarely included in GHG estimations for food and feedstuffs. Here we propose a method which can be used to derive emissions from LU and LUC on a regional level. Emissions are distributed over an accounting period chosen to match the physically occurring carbon fluxes. As fluxes from soil organic carbon persist for years or even for decades after a LUC episode, depending on the climatic conditions of the region, we apply 10 and 20 years as suitable accounting periods for tropical and temperate climate zones, respectively. We compare the proposed method with two other methods proposed in the literature. Using two types of feedstuffs (Brazilian soybean-meal and Austrian barley) as examples, we find that the other two methods produce mostly lower emission estimates in the case of Brazilian soybeans, and higher estimates for Austrian barley. We conclude that these differences are caused mainly by different accounting periods and by a (non)consideration of regional specificities. While analysing life cycles necessarily entails a well supported – but still arbitrary – setting of such system boundaries, we argue that the methodology presented here better reflects actually occurring carbon fluxes that we understand to be the foundation of any environmental product assessment.
      60  1Scopus© Citations 39
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    Publication
    Implementing an advanced waste separation step in an MBT plant: assessment of technical, economic and environmental impacts
    (Sage, 2013-06-23)
    Meirhofer, Martina 
    ;
    Piringer, Gerhard 
    ;
    Rixrath, Doris 
    ;
    Sommer, Manuel 
    ;
    Ragossnig, Arne M 
    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
  • No Thumbnail Available
    Publication
    Implementing an appropriate metric for the assessment of greenhouse gas emissions from livestock production: A national case study
    (Elsevier, 2022)
    Hörtenhuber, Stefan 
    ;
    Seiringer, Martin 
    ;
    Theurl, Michaela Clarissa 
    ;
    Größbacher, Verena 
    ;
    Piringer, Gerhard 
    ;
    Kral, Iris 
    ;
    Zollitsch, Werner 
      87  1Scopus© Citations 10
  • No Thumbnail Available
    Publication
    Aerosol-assisted nanoscale Fe/silica particles for dechlorination of trichloroethylene
    (AIChE, 2007-11-07)
    Zheng, Tonghua 
    ;
    Zhan, Jingjing 
    ;
    Piringer, Gerhard 
    ;
    McPherson, Gary L. 
    ;
    Lu, Yunfeng 
    ;
    John, Vijay T. 
    Nanoscale iron particles are a preferred option for the reductive dehalogenation of trichloroethylene (TCE) due to their environmentally benign nature, high efficiency and low cost. However, nanoscale zerovalent iron (ZVI) particles aggregate and in in-situ remediation technologies, it is difficult to transport these particles to the source of contamination. This study describes a novel approach to the preparation of ZVI nanoparticles that are efficient and effectively transport to contaminant sites. We describe the synthesis of silica supported iron nanoparticles using aerosol technology. While the encapsulated iron nanoparticles are reactive for groundwater trichloroethylene remediation, environmentally benign silica particles serve as effective carriers for nanoiron transport through soil. Encapsulation of iron into submicron silica particles protects ferromagnetic iron nanoparticles from aggregation and may increase their mobility through sedimentation. Additionally, the presence of surface silanol groups on silica particles allows control of surface properties via silanol modification using organic functional groups. Aerosol silica particles with functional groups such as ethyl tails on the surface preferentially adsorb hydrophobic TCE during environmental remediation. This increases the local concentration of TCE in the vicinity of iron nanoparticles, thus promoting the degradation of TCE by iron. These nanoscale iron/silica aerosol particles with controlled surface properties have the potential to be efficiently applied for in-situ remediation and permeable reactive barriers construction.
      58  1