The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform

Carsten Schulz - One of the best experts on this subject based on the ideXlab platform.

  • System delimitation in life cycle assessment (LCA) of aquaculture: striving for valid and comprehensive environmental assessment using rainbow trout farming as a case study
    The International Journal of Life Cycle Assessment, 2013
    Co-Authors: Biniam Samuel-fitwi, J.p. Schroeder, Carsten Schulz
    Abstract:

    Purpose Life cycle assessment (LCA) has been in the last one decade used as a standardized and structured method of evaluating the environmental impacts of aquaculture arising throughout the entire life cycle. However, aquaculture system hardly applied system expansion whenever a Multifunctional Process has more than one functional flow. The objective of this study is to develop a methodological approach for consequential LCA and model the system expansion of the different affected Processes of aquaculture. Methods In this study, we have considered the system expansion in two different stages in the life cycle of the fish production: aquacultural stage, with case study of trout aquaculture, and feed manufacturing stage. Rainbow trout ( Oncorhynchus mykiss ) production was used as a case study to illustrate the method using different scenarios of system expansion. Results and discussion The results of the six different scenarios of system expansion showed considerable variation among the different scenarios towards the environmental impact of trout aquaculture. Regarding global warming potential, the contributions vary by 5-fold; for acidification, variations were up to 32 %, and for land use, the contributions varied from 0.6 to 1.3 m^2a/kg of trout demanded in Germany. It appeared that eutrophication is similar in all the scenarios considered. Conclusions This article showed that system expansion can be used to handle the allocation issues of the co-products in the rainbow trout supply chain, thus, can be effectively used when analyzing the environmental consequences of changes in future rainbow trout production. Furthermore, consequential LCA may be important when comparing the impacts of alternative meal choices of aquafeeds. This may increase the incentive for speedy replacement of alternative meals, thus, reducing the dependence on the utilization of the limiting fisheries resources.

  • System delimitation in life cycle assessment (LCA) of aquaculture: striving for valid and comprehensive environmental assessment using rainbow trout farming as a case study
    The International Journal of Life Cycle Assessment, 2012
    Co-Authors: Biniam Samuel-fitwi, J.p. Schroeder, Carsten Schulz
    Abstract:

    Life cycle assessment (LCA) has been in the last one decade used as a standardized and structured method of evaluating the environmental impacts of aquaculture arising throughout the entire life cycle. However, aquaculture system hardly applied system expansion whenever a Multifunctional Process has more than one functional flow. The objective of this study is to develop a methodological approach for consequential LCA and model the system expansion of the different affected Processes of aquaculture. In this study, we have considered the system expansion in two different stages in the life cycle of the fish production: aquacultural stage, with case study of trout aquaculture, and feed manufacturing stage. Rainbow trout (Oncorhynchus mykiss) production was used as a case study to illustrate the method using different scenarios of system expansion. The results of the six different scenarios of system expansion showed considerable variation among the different scenarios towards the environmental impact of trout aquaculture. Regarding global warming potential, the contributions vary by 5-fold; for acidification, variations were up to 32 %, and for land use, the contributions varied from 0.6 to 1.3 m2a/kg of trout demanded in Germany. It appeared that eutrophication is similar in all the scenarios considered. This article showed that system expansion can be used to handle the allocation issues of the co-products in the rainbow trout supply chain, thus, can be effectively used when analyzing the environmental consequences of changes in future rainbow trout production. Furthermore, consequential LCA may be important when comparing the impacts of alternative meal choices of aquafeeds. This may increase the incentive for speedy replacement of alternative meals, thus, reducing the dependence on the utilization of the limiting fisheries resources.

Biniam Samuel-fitwi - One of the best experts on this subject based on the ideXlab platform.

  • System delimitation in life cycle assessment (LCA) of aquaculture: striving for valid and comprehensive environmental assessment using rainbow trout farming as a case study
    The International Journal of Life Cycle Assessment, 2013
    Co-Authors: Biniam Samuel-fitwi, J.p. Schroeder, Carsten Schulz
    Abstract:

    Purpose Life cycle assessment (LCA) has been in the last one decade used as a standardized and structured method of evaluating the environmental impacts of aquaculture arising throughout the entire life cycle. However, aquaculture system hardly applied system expansion whenever a Multifunctional Process has more than one functional flow. The objective of this study is to develop a methodological approach for consequential LCA and model the system expansion of the different affected Processes of aquaculture. Methods In this study, we have considered the system expansion in two different stages in the life cycle of the fish production: aquacultural stage, with case study of trout aquaculture, and feed manufacturing stage. Rainbow trout ( Oncorhynchus mykiss ) production was used as a case study to illustrate the method using different scenarios of system expansion. Results and discussion The results of the six different scenarios of system expansion showed considerable variation among the different scenarios towards the environmental impact of trout aquaculture. Regarding global warming potential, the contributions vary by 5-fold; for acidification, variations were up to 32 %, and for land use, the contributions varied from 0.6 to 1.3 m^2a/kg of trout demanded in Germany. It appeared that eutrophication is similar in all the scenarios considered. Conclusions This article showed that system expansion can be used to handle the allocation issues of the co-products in the rainbow trout supply chain, thus, can be effectively used when analyzing the environmental consequences of changes in future rainbow trout production. Furthermore, consequential LCA may be important when comparing the impacts of alternative meal choices of aquafeeds. This may increase the incentive for speedy replacement of alternative meals, thus, reducing the dependence on the utilization of the limiting fisheries resources.

  • System delimitation in life cycle assessment (LCA) of aquaculture: striving for valid and comprehensive environmental assessment using rainbow trout farming as a case study
    The International Journal of Life Cycle Assessment, 2012
    Co-Authors: Biniam Samuel-fitwi, J.p. Schroeder, Carsten Schulz
    Abstract:

    Life cycle assessment (LCA) has been in the last one decade used as a standardized and structured method of evaluating the environmental impacts of aquaculture arising throughout the entire life cycle. However, aquaculture system hardly applied system expansion whenever a Multifunctional Process has more than one functional flow. The objective of this study is to develop a methodological approach for consequential LCA and model the system expansion of the different affected Processes of aquaculture. In this study, we have considered the system expansion in two different stages in the life cycle of the fish production: aquacultural stage, with case study of trout aquaculture, and feed manufacturing stage. Rainbow trout (Oncorhynchus mykiss) production was used as a case study to illustrate the method using different scenarios of system expansion. The results of the six different scenarios of system expansion showed considerable variation among the different scenarios towards the environmental impact of trout aquaculture. Regarding global warming potential, the contributions vary by 5-fold; for acidification, variations were up to 32 %, and for land use, the contributions varied from 0.6 to 1.3 m2a/kg of trout demanded in Germany. It appeared that eutrophication is similar in all the scenarios considered. This article showed that system expansion can be used to handle the allocation issues of the co-products in the rainbow trout supply chain, thus, can be effectively used when analyzing the environmental consequences of changes in future rainbow trout production. Furthermore, consequential LCA may be important when comparing the impacts of alternative meal choices of aquafeeds. This may increase the incentive for speedy replacement of alternative meals, thus, reducing the dependence on the utilization of the limiting fisheries resources.

J.p. Schroeder - One of the best experts on this subject based on the ideXlab platform.

  • System delimitation in life cycle assessment (LCA) of aquaculture: striving for valid and comprehensive environmental assessment using rainbow trout farming as a case study
    The International Journal of Life Cycle Assessment, 2013
    Co-Authors: Biniam Samuel-fitwi, J.p. Schroeder, Carsten Schulz
    Abstract:

    Purpose Life cycle assessment (LCA) has been in the last one decade used as a standardized and structured method of evaluating the environmental impacts of aquaculture arising throughout the entire life cycle. However, aquaculture system hardly applied system expansion whenever a Multifunctional Process has more than one functional flow. The objective of this study is to develop a methodological approach for consequential LCA and model the system expansion of the different affected Processes of aquaculture. Methods In this study, we have considered the system expansion in two different stages in the life cycle of the fish production: aquacultural stage, with case study of trout aquaculture, and feed manufacturing stage. Rainbow trout ( Oncorhynchus mykiss ) production was used as a case study to illustrate the method using different scenarios of system expansion. Results and discussion The results of the six different scenarios of system expansion showed considerable variation among the different scenarios towards the environmental impact of trout aquaculture. Regarding global warming potential, the contributions vary by 5-fold; for acidification, variations were up to 32 %, and for land use, the contributions varied from 0.6 to 1.3 m^2a/kg of trout demanded in Germany. It appeared that eutrophication is similar in all the scenarios considered. Conclusions This article showed that system expansion can be used to handle the allocation issues of the co-products in the rainbow trout supply chain, thus, can be effectively used when analyzing the environmental consequences of changes in future rainbow trout production. Furthermore, consequential LCA may be important when comparing the impacts of alternative meal choices of aquafeeds. This may increase the incentive for speedy replacement of alternative meals, thus, reducing the dependence on the utilization of the limiting fisheries resources.

  • System delimitation in life cycle assessment (LCA) of aquaculture: striving for valid and comprehensive environmental assessment using rainbow trout farming as a case study
    The International Journal of Life Cycle Assessment, 2012
    Co-Authors: Biniam Samuel-fitwi, J.p. Schroeder, Carsten Schulz
    Abstract:

    Life cycle assessment (LCA) has been in the last one decade used as a standardized and structured method of evaluating the environmental impacts of aquaculture arising throughout the entire life cycle. However, aquaculture system hardly applied system expansion whenever a Multifunctional Process has more than one functional flow. The objective of this study is to develop a methodological approach for consequential LCA and model the system expansion of the different affected Processes of aquaculture. In this study, we have considered the system expansion in two different stages in the life cycle of the fish production: aquacultural stage, with case study of trout aquaculture, and feed manufacturing stage. Rainbow trout (Oncorhynchus mykiss) production was used as a case study to illustrate the method using different scenarios of system expansion. The results of the six different scenarios of system expansion showed considerable variation among the different scenarios towards the environmental impact of trout aquaculture. Regarding global warming potential, the contributions vary by 5-fold; for acidification, variations were up to 32 %, and for land use, the contributions varied from 0.6 to 1.3 m2a/kg of trout demanded in Germany. It appeared that eutrophication is similar in all the scenarios considered. This article showed that system expansion can be used to handle the allocation issues of the co-products in the rainbow trout supply chain, thus, can be effectively used when analyzing the environmental consequences of changes in future rainbow trout production. Furthermore, consequential LCA may be important when comparing the impacts of alternative meal choices of aquafeeds. This may increase the incentive for speedy replacement of alternative meals, thus, reducing the dependence on the utilization of the limiting fisheries resources.

Inmaculada Rodríguez-ramos - One of the best experts on this subject based on the ideXlab platform.

  • Dry reforming of methane using Pd-based membrane reactors fabricated from different substrates
    Journal of Membrane Science, 2013
    Co-Authors: F.r. García-garcía, M.a. Soria, C. Mateos-pedrero, Antonio Guerrero-ruiz, Inmaculada Rodríguez-ramos
    Abstract:

    Abstract In this study, performance and feasibility of a hollow fibre membrane reactor (HFMR), consisting of a packed catalyst bed around a Pd coated Al2O3 hollow fibre membrane, has been studied and compared with both conventional Pd based tubular membrane reactor (TMR) fabricated from a stainless steel substrate and traditional fixed-bed reactor (FBR). The ceramic based HFMR presents several advantages over MRs such as the deposition of ultra thin Pd membranes and the possibility to scale up the whole Multifunctional Process by module configuration. The results obtained at 450 °C during the methane dry reforming (MDR) reaction showed that, although CH4 conversion using the HFMR was almost the same as that of a catalytic TMR, the amount of Pd employed for the Pd layer deposition in the HFMR was fifteen times less than that in TMR. Moreover, the CH4 conversion using the HFMR was 72% higher than that in a traditional FBR and 34% higher than thermodynamic equilibrium. Also, a high purity COX-free H2 production (10.5 ml/mg h) was achieved at 525 °C using a sweep gas of 100 ml/min in the lumen side of the HFMR.

F.r. García-garcía - One of the best experts on this subject based on the ideXlab platform.

  • Dry reforming of methane using Pd-based membrane reactors fabricated from different substrates
    Journal of Membrane Science, 2013
    Co-Authors: F.r. García-garcía, M.a. Soria, C. Mateos-pedrero, Antonio Guerrero-ruiz, Inmaculada Rodríguez-ramos
    Abstract:

    Abstract In this study, performance and feasibility of a hollow fibre membrane reactor (HFMR), consisting of a packed catalyst bed around a Pd coated Al2O3 hollow fibre membrane, has been studied and compared with both conventional Pd based tubular membrane reactor (TMR) fabricated from a stainless steel substrate and traditional fixed-bed reactor (FBR). The ceramic based HFMR presents several advantages over MRs such as the deposition of ultra thin Pd membranes and the possibility to scale up the whole Multifunctional Process by module configuration. The results obtained at 450 °C during the methane dry reforming (MDR) reaction showed that, although CH4 conversion using the HFMR was almost the same as that of a catalytic TMR, the amount of Pd employed for the Pd layer deposition in the HFMR was fifteen times less than that in TMR. Moreover, the CH4 conversion using the HFMR was 72% higher than that in a traditional FBR and 34% higher than thermodynamic equilibrium. Also, a high purity COX-free H2 production (10.5 ml/mg h) was achieved at 525 °C using a sweep gas of 100 ml/min in the lumen side of the HFMR.