Evaluation of the economic feasibility of a two-stage gasification system for hydrogen, liquid fuels and energy production from residues

This study evaluates the possibility of recovery of high-quality valuable fish oil and proteins from fish co-streams by traditional means or a combination of several technologies. A techno-economically feasible and sustainable zero-waste process is needed for full utilisation of this co-stream’s potential. This study aims to determine the energy efficiency and economic feasibility of four different zero-waste bio-refineries based on salmon filleting co-streams. The study covers four concepts: (I) biogas and fertiliser production from salmon co-streams, (II) fish silage production, (III) thermal processing of salmon co-streams for producing oil, protein concentrate, and meal, and (IV) novel two-stage thermal and enzymatic process for producing high-quality oil and protein hydrolysate, while the solid residue is converted to biogas and fertilisers. Monte Carlo simulation is used to evaluate uncertainties in economic evaluation. The results show that the two-stage processing of fish co-streams leads to recovery of both high-quality marine oil and proteins, showing the largest profitability and return on investment during the economic analysis. It is a more tempting option than the currently used thermal treatment or traditional silage processes. The possibility of producing food-grade fish protein hydrolysate is the biggest benefit here. Concepts studied are examples of zero-waste processing of bioproducts and illustrate the possibilities and benefits of fully utilising the different fractions of fish as fillets, oil, protein, fertilisers, and energy production.

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Two-Stage vs Single-Stage Thermophilic Anaerobic Digestion: Comparison of Energy Production and Biodegradation Efficiencies

Environmental Science & Technology ◽

10.1021/es301376n ◽

2012 ◽

Vol 46 (15) ◽

pp. 8502-8510 ◽

Cited By ~ 102

Author(s):

Andrea Schievano ◽

Alberto Tenca ◽

Barbara Scaglia ◽

Giuseppe Merlino ◽

Aurora Rizzi ◽

...

Keyword(s):

Anaerobic Digestion ◽

Energy Production ◽

Single Stage ◽

Two Stage ◽

Thermophilic Anaerobic Digestion

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Engineering Enzymes for Energy Production

Australian Journal of Chemistry ◽

10.1071/ch11452 ◽

2012 ◽

Vol 65 (6) ◽

pp. 652 ◽

Cited By ~ 2

Author(s):

David L. Ollis ◽

Jian-Wei Liu ◽

Bradley J. Stevenson

Keyword(s):

Energy Production ◽

Electrical Energy ◽

Biological Materials ◽

Direct Conversion ◽

Liquid Fuels ◽

Modern Economy ◽

Energy Needs ◽

Entire Energy

Harvesting the energy of sunlight can be achieved with a variety of processes and as one becomes obsolete, others will need to be developed to replace it. The direct conversion of sunlight into electrical energy could be used to provide power. Energy could also be obtained by combusting hydrogen produced by splitting of water with sunlight. None of these direct approaches will entirely satisfy the entire energy needs of a modern economy and the conversion of biological materials into liquid fuels for transport and other applications may prove to be important for tomorrow’s energy needs. In fact, biofuels such as bioethanol and biodiesel are already used in many countries. However, the long-term viability of these fuels depends on the efficiency of the processes used to produce them. We outline here a method by which ethanol can be produced using enzymes that can be optimized for this purpose.

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Enhancement of co-production of lutein and protein in Chlorella sorokiniana FZU60 using different bioprocess operation strategies

Bioresources and Bioprocessing ◽

10.1186/s40643-021-00436-9 ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Ruijuan Ma ◽

Zhen Zhang ◽

Zhuzhen Tang ◽

Shih-Hsin Ho ◽

Xinguo Shi ◽

...

Keyword(s):

High Efficiency ◽

Continuous Production ◽

Nitrogen Deficiency ◽

Batch Cultivation ◽

Chlorella Sorokiniana ◽

Economic Feasibility ◽

Commercial Application ◽

Fed Batch ◽

Two Stage ◽

Microalgal Culture

AbstractCo-production of multiple compounds is an efficient approach to enhance the economic feasibility of microalgae-based metabolites production. In this study, Chlorella sorokiniana FZU60 was cultivated under different bioprocess strategies to enhance the co-production of lutein and protein. Results showed that both lutein and protein content (7.72 and 538.06 mg/g, respectively) were highest at the onset of nitrogen deficiency under batch cultivation. Semi-batch III strategy, with 75% microalgal culture replacement by fresh medium, obtained similar content, productivity, and yield of lutein and protein as batch cultivation, demonstrating that it can be used for stable and continuous production. Fed-batch II strategy, feeding with 1/3 modified BG11 medium, achieved super-high lutein and protein yield (28.81 and 1592.77 mg/L, respectively), thus can be used for high-output production. Besides, two-stage strategy, combining light intensity shift and semi-batch cultivation, gained extremely high lutein and protein productivity (15.31 and 1080.41 mg/L/day, respectively), thereby is a good option for high-efficiency production. Moreover, the fed-batch II and two-stage strategy achieved high-quality lutein and protein, thus are promising for the co-production of lutein and protein in C. sorokiniana FZU60 for commercial application.

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Two-Stage, Integrated, Geothermal-CO2 Storage Reservoirs: An Approach for Sustainable Energy Production, CO2-Sequestration Security, and Reduced Environmental Risk

10.2172/1035606 ◽

2012 ◽

Cited By ~ 3

Author(s):

T Buscheck ◽

M Chen ◽

Y Sun ◽

Y Hao ◽

T Elliot

Keyword(s):

Environmental Risk ◽

Co2 Sequestration ◽

Energy Production ◽

Sustainable Energy ◽

Co2 Storage ◽

Two Stage ◽

Storage Reservoirs

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ESTUDIO DE FACTIBILIDAD PARA LA IMPLEMENTACIÓN DE UN CICLO ORGÁNICO DE RANKINE EN POZOS DE EXTRACCIÓN DE PETRÓLEO (FEASIBILITY ANALYSIS FOR THE APPLICATION OF AN ORGANIC RANKIN CYCLE IN AN OILFIELD)

Revista EIA ◽

10.24050/reia.v0i0.533 ◽

2018 ◽

Author(s):

Ilba Geonine Cuadrado Peña ◽

Andrés Felipe Colorado Granda ◽

Juan Carlos Cobos Gómez ◽

Juan Carlos Vásquez Rueda

Keyword(s):

Energy Production ◽

Oil Extraction ◽

Economic Feasibility ◽

Feasibility Analysis ◽

Geothermal Resources ◽

Flow Rates ◽

Heating And Cooling ◽

Study Results ◽

Generation Cost ◽

Rankin Cycle

Se evalúa la factibilidad técnica y económica del uso de un ciclo binario del tipo ORC para la generación de electricidad, a partir del aprovechamiento del recurso geotérmico de baja temperatura disponible en varios campos de petróleo en Colombia. Las temperaturas del agua obtenida como subproducto durante la extracción de crudo son 118 ºC en boca de pozo y 82 ºC en etapas de disposición, con caudales de hasta 2,38 m3/s. Para incrementar la eficiencia del ciclo convencional, fueron evaluadas alternativas de calentamiento de la corriente del lado de alta temperatura y de enfriamiento del lado de baja temperatura. Se encontró que un equipo comercial ORC de 280 kW produciría en uno de los campos 1.165,1 MWh anuales con un costo de generación de 0,102 U$/KWh. Los resultados de este estudio no permiten la implementación de equipos ORC porque se requieren mayores temperaturas que garanticen la factibilidad técnica.Abstract: These paper analyze the technical and economic feasibility of generating electricity from low temperature geothermal resources available in oil oilfields in Colombia using binary ORC technology. The water obtained as a byproduct during oil extraction has 118°C temperatures at wellhead and 80ºC on average in disposal stages; the water flow rates reach values of 2.38 m3/s. Were studied to improve the efficiency, technical options for additional heating and cooling of hot and cold streams. According to the results found, 1.165,1 MWh energy production by year and 0,102 U$/KWh in unitary generation cost is for the 280 kW commercial ORC machine. According to the experience developed in this study results do not permit ORC immediate implementation because are necessary higher temperatures to guarantee technical feasibility.Sumário: A viabilidade técnica e econômica da utilização de um ciclo ORC binário para geração de eletricidade a partir da utilização de recursos geotérmicos de baixa temperatura disponíveis em vários campos de petróleo na Colômbia é avaliada. As temperaturas da água obtida como um subproduto durante a extração de petróleo cru são 118 ºC na boca de poço e 82 ºC em fases de distribuição, com vazões de até 2,38 m3/s. Para aumentar a eficiência do ciclo convencional, foram avaliadas (várias) opções de aquecimento da corrente de alta temperatura e de esfriamento do lado de baixa temperatura. Verificou-se que um equipamento comercial ORC de 280 kW poderia gerar em um dos campos 1165,1 MWh anuais a um custo de 0,102 U$/kWh. Estes resultados não permitem a implementação de equipamentos ORC porque precisam-se temperaturas mais altas para assegurar a viabilidade técnica.

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