Thermal analysis and optimization of an anaerobic treatment system of whey

Spachos, Thomas; Stamatis, A.

doi:10.1016/j.renene.2011.01.020

Cited by 14 publications

(12 citation statements)

References 11 publications

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“…Because of the high organic content of CW, AD constitutes an excellent treatment method [10]. This fact has also been proved by Spachos and Stamatis [67], through exergy and economic analysis of a modeled CW treatment AD system.…”

Section: Use Of Anaerobic Digestion Systems-production Of Biogas and mentioning

confidence: 72%

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Biotechnological Utilization with a Focus on Anaerobic Treatment of Cheese Whey: Current Status and Prospects

2012

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Abstract:Cheese whey utilization is of major concern nowadays. Its high organic matter content, in combination with the high volumes produced and limited treatment options make cheese whey a serious environmental problem. However, the potential production of biogas (methane), hydrogen or other marketable products with a simultaneous high COD reduction through appropriate treatment proves that cheese whey must be considered as an energy resource rather than a pollutant. The presence of biodegradable components in the cheese whey coupled with the advantages of anaerobic digestion processes over other treatment methods makes anaerobic digestion an attractive and suitable treatment option. This paper intends to review the most representative applications of anaerobic treatment of cheese whey currently being exploited and under research. Moreover, an effort has been made to categorize the common characteristics of the various research efforts and find a comparative basis, as far as their results are concerned. In addition, a number of dairy industries already using such anaerobic digestion systems are presented.

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Section: Use Of Anaerobic Digestion Systems-production Of Biogas and mentioning

confidence: 72%

“…An indicative example is the economic analysis work of Spachos and Stamatis [67], which is performed using the Net Present Value (NPV) method. The Total Capital Investment of the system which produces 272.2 kg/hr of biogas calculated to be 2,069,000 €.…”

Section: Dairy Industries Using Anaerobic Digestion Systemsmentioning

confidence: 99%

Biotechnological Utilization with a Focus on Anaerobic Treatment of Cheese Whey: Current Status and Prospects

2012

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“…The most important property of alternative energy sources is their environmental compatibility (Kothari et al, 2010). New environmentally friendly technologies will take advantage of any renewable energy source to produce energy and will treat waste in a less costly way, in terms of energy consumption and environmental impact (Spachos and Stamatis, 2011).…”

Section: Introductionmentioning

confidence: 99%

Utilization of biogas produced by anaerobic digestion of agro-industrial waste: Energy, economic and environmental effects

2014

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Anaerobic digestion of agro-industrial waste is of significant interest in order to facilitate a sustainable development of energy supply. Using of material and energy potentials of agro-industrial waste, in the framework of technical, economic, and ecological possibilities, contributes in increasing the share of energy generated from renewable energy sources. The paper deals with the benefits arising from the utilization of biogas produced by co-digestion of whey and cow manure. The advantages of this process are the profitability of the plant and the convenience in realizing an anaerobic digestion plant to produce biogas that is enabled by the benefits from the sale of electric energy at favorable prices. Economic aspects are related to the capital cost (€ 2,250,000) of anaerobic digestion treatment in a biogas plant with a 300 kW power and 510 kW heating unit in a medium size farm (450 livestock units). Considering the optimum biogas yield of 20.7 dm(3) kg(-1) of wet substrate and methane content in the biogas obtained of 79%, the anaerobic process results in a daily methane production of 2,500 kg, with the maximum power generation of 2,160,000 kWh y(-1) and heat generation of 2,400,000 kWh y(-1) The net present value (NPV), internal rate of return (IRR) and payback period for implementation of profitable anaerobic digestion process is evaluated. Ecological aspects related to carbon dioxide (CO2) and methane (CH4) emission reduction are assessed.

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“…Dairy farmers producing milk could be required in the future to operate using such energy sources, and one option is to use bio-fuel produced from farm waste, which can be considered a net-zero carbon emission energy source (Loo and Koppejan, 2010). Thermodynamic analysis and optimization of an anaerobic treatment system for whey is presented (Spachos and Stamatis, 2011). In this study, performance investigations weere conducted based on exergy and economic analyses of an anaerobic treatment system of whey and it was concluded that the anaerobic treatment system is a sustainable investment.…”

Section: Introductionmentioning

confidence: 99%

Multi-generation Renewable Energy System for Dairy Farms: Exergy Analysis

Kool

Cuomo

Reddy

et al. 2018

European Journal of Sustainable Development Research

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Exergy analyses of multi-generational micro gas turbine systems are reported for a grid-independent dairy farm in Ontario, Canada, with an aim of being environmentally benign. Onsite anaerobic digesters utilize farm waste to produce carbon neutral biogas for combustion in the micro gas turbine modules. A range of micro gas turbines coupled with absorption refrigeration units and an organic Rankine cycle are driven by the recovered waste heat to meet the cooling and electrical needs of farm sizes between 250 and 6000 cows. Exergy balances are applied to each component as well the overall system configuration, and exergy efficiencies are obtained. Small farm sizes with one absorption cooling unit are found to be more exergy efficient than large farm sizes with more than one absorption cooling unit, but the difference is less than 0.5%. Most of exergy destruction within the micro gas turbine module occurs in the combustion chamber, which contributes 79% of the exergy destruction of the system. Farm sizes between 250 and 6000 cows are observed to be capable of having their cooling and electricity needs met with micro gas turbines ranging in capacity from 100 to 1000 kW output, while exhibiting similar exergy efficiencies.

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Thermal analysis and optimization of an anaerobic treatment system of whey

Cited by 14 publications

References 11 publications

Biotechnological Utilization with a Focus on Anaerobic Treatment of Cheese Whey: Current Status and Prospects

Biotechnological Utilization with a Focus on Anaerobic Treatment of Cheese Whey: Current Status and Prospects

Utilization of biogas produced by anaerobic digestion of agro-industrial waste: Energy, economic and environmental effects

Multi-generation Renewable Energy System for Dairy Farms: Exergy Analysis

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