The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Johann F Gorgens - One of the best experts on this subject based on the ideXlab platform.
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techno economics of integrating bioethanol production from spent Sulfite liquor for reduction of greenhouse gas emissions from Sulfite Pulping mills
Biotechnology for Biofuels, 2014Co-Authors: Abdul M Petersen, Kate Haigh, Johann F GorgensAbstract:Flow sheet options for integrating ethanol production from spent Sulfite liquor (SSL) into the acid-based Sulfite Pulping process at the Sappi Saiccor mill (Umkomaas, South Africa) were investigated, including options for generation of thermal and electrical energy from onsite bio-wastes, such as bark. Processes were simulated with Aspen Plus® for mass- and energy-balances, followed by an estimation of the economic viability and environmental impacts. Various concentration levels of the total dissolved solids in magnesium oxide-based SSL, which currently fuels a recovery boiler, prior to fermentation was considered, together with return of the fermentation residues (distillation bottoms) to the recovery boiler after ethanol separation. The generation of renewable thermal and electrical energy from onsite bio-wastes were also included in the energy balance of the combined Pulping-ethanol process, in order to partially replace coal consumption. The bio-energy supplementations included the combustion of bark for heat and electricity generation and the bio-digestion of the calcium oxide SSL to produce methane as additional energy source. Ethanol production from SSL at the highest substrate concentration was the most economically feasible when coal was used for process energy. However this solution did not provide any savings in greenhouse gas (GHG) emissions for the concentration-fermentation-distillation process. Maximizing the use of renewable energy sources to partially replace coal consumption yielded a satisfactory economic performance, with a minimum ethanol selling price of 0.83 US$/l , and a drastic reduction in the overall greenhouse gas emissions for the entire facility. High substrate concentrations and conventional distillation should be used when considering integrating ethanol production at Sulfite Pulping mills. Bio-wastes generated onsite should be utilized at their maximum potential for energy generation in order to maximize the GHG emissions reduction.
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techno economics of integrating bioethanol production from spent Sulfite liquor for reduction of greenhouse gas emissions from Sulfite Pulping mills
Biotechnology for Biofuels, 2014Co-Authors: Abdul M Petersen, Kate Haigh, Johann F GorgensAbstract:Background Flow sheet options for integrating ethanol production from spent Sulfite liquor (SSL) into the acid-based Sulfite Pulping process at the Sappi Saiccor mill (Umkomaas, South Africa) were investigated, including options for generation of thermal and electrical energy from onsite bio-wastes, such as bark. Processes were simulated with Aspen Plus® for mass- and energy-balances, followed by an estimation of the economic viability and environmental impacts. Various concentration levels of the total dissolved solids in magnesium oxide-based SSL, which currently fuels a recovery boiler, prior to fermentation was considered, together with return of the fermentation residues (distillation bottoms) to the recovery boiler after ethanol separation. The generation of renewable thermal and electrical energy from onsite bio-wastes were also included in the energy balance of the combined Pulping-ethanol process, in order to partially replace coal consumption. The bio-energy supplementations included the combustion of bark for heat and electricity generation and the bio-digestion of the calcium oxide SSL to produce methane as additional energy source.
Abdul M Petersen - One of the best experts on this subject based on the ideXlab platform.
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techno economics of integrating bioethanol production from spent Sulfite liquor for reduction of greenhouse gas emissions from Sulfite Pulping mills
Biotechnology for Biofuels, 2014Co-Authors: Abdul M Petersen, Kate Haigh, Johann F GorgensAbstract:Flow sheet options for integrating ethanol production from spent Sulfite liquor (SSL) into the acid-based Sulfite Pulping process at the Sappi Saiccor mill (Umkomaas, South Africa) were investigated, including options for generation of thermal and electrical energy from onsite bio-wastes, such as bark. Processes were simulated with Aspen Plus® for mass- and energy-balances, followed by an estimation of the economic viability and environmental impacts. Various concentration levels of the total dissolved solids in magnesium oxide-based SSL, which currently fuels a recovery boiler, prior to fermentation was considered, together with return of the fermentation residues (distillation bottoms) to the recovery boiler after ethanol separation. The generation of renewable thermal and electrical energy from onsite bio-wastes were also included in the energy balance of the combined Pulping-ethanol process, in order to partially replace coal consumption. The bio-energy supplementations included the combustion of bark for heat and electricity generation and the bio-digestion of the calcium oxide SSL to produce methane as additional energy source. Ethanol production from SSL at the highest substrate concentration was the most economically feasible when coal was used for process energy. However this solution did not provide any savings in greenhouse gas (GHG) emissions for the concentration-fermentation-distillation process. Maximizing the use of renewable energy sources to partially replace coal consumption yielded a satisfactory economic performance, with a minimum ethanol selling price of 0.83 US$/l , and a drastic reduction in the overall greenhouse gas emissions for the entire facility. High substrate concentrations and conventional distillation should be used when considering integrating ethanol production at Sulfite Pulping mills. Bio-wastes generated onsite should be utilized at their maximum potential for energy generation in order to maximize the GHG emissions reduction.
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techno economics of integrating bioethanol production from spent Sulfite liquor for reduction of greenhouse gas emissions from Sulfite Pulping mills
Biotechnology for Biofuels, 2014Co-Authors: Abdul M Petersen, Kate Haigh, Johann F GorgensAbstract:Background Flow sheet options for integrating ethanol production from spent Sulfite liquor (SSL) into the acid-based Sulfite Pulping process at the Sappi Saiccor mill (Umkomaas, South Africa) were investigated, including options for generation of thermal and electrical energy from onsite bio-wastes, such as bark. Processes were simulated with Aspen Plus® for mass- and energy-balances, followed by an estimation of the economic viability and environmental impacts. Various concentration levels of the total dissolved solids in magnesium oxide-based SSL, which currently fuels a recovery boiler, prior to fermentation was considered, together with return of the fermentation residues (distillation bottoms) to the recovery boiler after ethanol separation. The generation of renewable thermal and electrical energy from onsite bio-wastes were also included in the energy balance of the combined Pulping-ethanol process, in order to partially replace coal consumption. The bio-energy supplementations included the combustion of bark for heat and electricity generation and the bio-digestion of the calcium oxide SSL to produce methane as additional energy source.
Gu Feng - One of the best experts on this subject based on the ideXlab platform.
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physical and chemical properties of ammonia Sulfite Pulping black liquor before and after ultrafiltration
Journal of Nanjing Forestry University, 2008Co-Authors: Gu FengAbstract:Ultrafiltration treatment of the ammonia Sulfite Pulping black liquor of wheat straw and its effects on chemical structure characteristics and physical properties were studied.The results showed that after ultrafiltration the content of lignin in retentate increased by 17.42% and the content of ash decreased by 18.22%.It was seen that the molecular weight distribution of lignin in black liquor and retentate were determined by Gel Chromatography.The molecular weight of lignin in permeate mainly concentrated in the range less than 4 950 with the occupation of 82.86%,and the molecular weight of lignin in retentate was higher than that in black liquor.The contents of sulfonic,carboxyl,phenolic hydroxyl groups which are the main functional groups in retentate were all more than those in black liquor.Meanwhile,after ultrafiltration,the retentate had better performance than black liquor as surfactant,as additive in concrete and as dispersant.Compared with black liquor,its surface tension at 1% was 54.7 mN/m,and dropped 2.2 mN/m.Clean solution's fluidity improved from 70mm to 102mm.However,the performance of retentate was limited by ultrafiltration so that it would be further improved by modification.
Liu Bingyue - One of the best experts on this subject based on the ideXlab platform.
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the comprehensive utilization of rice straw ammonium Sulfite Pulping waster
Heilongjiang Pulp & Paper, 2008Co-Authors: Liu BingyueAbstract:This paper researched the quantity and available composition of rice straw ammonium Sulfite Pulping waster. These wasters were made up compound fertilizer, which is not only saving cost of disposal, but also endowing with economical social benefit. These measures of waste cyclic utilization conform to sustainable development.
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analysis of nitrogen content during the oxide ammonium decomposition of ammonia Sulfite Pulping waste liquor
China Pulp & Paper, 2005Co-Authors: Liu BingyueAbstract:The nitrogen,which is in ammonium in the ammonia Sulfite Pulping waste liquor of rice straw,is converted into organic nitrogen by using oxide-ammonium decomposition method.The paper introduces the preparation of liquid ion-exchange agent using amino dodecane and n-octyl alcohol.Both the raw Pulping waste liquor and the Pulping waste liquor after oxide-ammonium decomposition are separated and extracted to be the solvent layer and the water layer.This paper analyzes the distribution of nitrogen,in the form of ammonium and organic nitrogen,in the solvent layer and the water layer.The paper also studies the conversion of nitrogen in ammonium state and organic nitrogen in the solvent layer and the water layer during oxide-ammonium decomposition.
Kate Haigh - One of the best experts on this subject based on the ideXlab platform.
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techno economics of integrating bioethanol production from spent Sulfite liquor for reduction of greenhouse gas emissions from Sulfite Pulping mills
Biotechnology for Biofuels, 2014Co-Authors: Abdul M Petersen, Kate Haigh, Johann F GorgensAbstract:Flow sheet options for integrating ethanol production from spent Sulfite liquor (SSL) into the acid-based Sulfite Pulping process at the Sappi Saiccor mill (Umkomaas, South Africa) were investigated, including options for generation of thermal and electrical energy from onsite bio-wastes, such as bark. Processes were simulated with Aspen Plus® for mass- and energy-balances, followed by an estimation of the economic viability and environmental impacts. Various concentration levels of the total dissolved solids in magnesium oxide-based SSL, which currently fuels a recovery boiler, prior to fermentation was considered, together with return of the fermentation residues (distillation bottoms) to the recovery boiler after ethanol separation. The generation of renewable thermal and electrical energy from onsite bio-wastes were also included in the energy balance of the combined Pulping-ethanol process, in order to partially replace coal consumption. The bio-energy supplementations included the combustion of bark for heat and electricity generation and the bio-digestion of the calcium oxide SSL to produce methane as additional energy source. Ethanol production from SSL at the highest substrate concentration was the most economically feasible when coal was used for process energy. However this solution did not provide any savings in greenhouse gas (GHG) emissions for the concentration-fermentation-distillation process. Maximizing the use of renewable energy sources to partially replace coal consumption yielded a satisfactory economic performance, with a minimum ethanol selling price of 0.83 US$/l , and a drastic reduction in the overall greenhouse gas emissions for the entire facility. High substrate concentrations and conventional distillation should be used when considering integrating ethanol production at Sulfite Pulping mills. Bio-wastes generated onsite should be utilized at their maximum potential for energy generation in order to maximize the GHG emissions reduction.
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techno economics of integrating bioethanol production from spent Sulfite liquor for reduction of greenhouse gas emissions from Sulfite Pulping mills
Biotechnology for Biofuels, 2014Co-Authors: Abdul M Petersen, Kate Haigh, Johann F GorgensAbstract:Background Flow sheet options for integrating ethanol production from spent Sulfite liquor (SSL) into the acid-based Sulfite Pulping process at the Sappi Saiccor mill (Umkomaas, South Africa) were investigated, including options for generation of thermal and electrical energy from onsite bio-wastes, such as bark. Processes were simulated with Aspen Plus® for mass- and energy-balances, followed by an estimation of the economic viability and environmental impacts. Various concentration levels of the total dissolved solids in magnesium oxide-based SSL, which currently fuels a recovery boiler, prior to fermentation was considered, together with return of the fermentation residues (distillation bottoms) to the recovery boiler after ethanol separation. The generation of renewable thermal and electrical energy from onsite bio-wastes were also included in the energy balance of the combined Pulping-ethanol process, in order to partially replace coal consumption. The bio-energy supplementations included the combustion of bark for heat and electricity generation and the bio-digestion of the calcium oxide SSL to produce methane as additional energy source.
