Search results for "Process costing"

showing 3 items of 3 documents

Lower and Upper Bounds of Manufacturing Cost in FMS

1993

Abstract The use of traditional techniques of product costing, cost control and performance evaluation in advanced manufacturing environment supplies poor results to operations management. In this paper, after a brief review of the major drawbacks of traditional machining economics, a new framework for product costing will be presented. The basis of the proposed approach lies on an analysis of the production process aimed at single out proper cost drivers for the use of the various employed manufacturing resources. As a consequence, the quota of the manufacturing cost of uncertain allocation is drastically reduced. A lower and an upper bound value of the unit production cost are also define…

EngineeringOperations researchbusiness.industryTotal absorption costingMechanical EngineeringCost accountingIndustrial and Manufacturing EngineeringManufacturing costCost driverAdvanced manufacturingProcess costingActivity-based costingbusinessTarget costingCIRP Annals
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Filtration process cost in submerged anaerobic membrane bioreactors (AnMBRs) for urban wastewater treatment

2015

[EN] The objective of this study was to evaluate the effect of the main factors affecting the cost of the filtration process in submerged anaerobic membrane bioreactors (AnMBRs) for urban wastewater (UWW) treatment. Experimental data for CAPEX/OPEX calculations was obtained in an AnMBR system featuring industrial-scale hollow-fiber (HF) membranes. Results showed that operating at J(20) slightly higher than the critical flux results in minimum CAPEX/OPEX. The minimum filtration process cost ranged from Euro0.03 to Euro0.12 per m(3), mainly depending on SGD(m) (from 0.05 to 0.3 m(3)m(-2)h(-1)) and MLSS (from 5 to 25 gL-1). The optimal SGD(m) resulted in approx. 0.1 m(3)m(-2)h(-1).

Industrial-scale hollow-fiber membranesINGENIERIA HIDRAULICAGeneral Chemical EngineeringFiltration and Separation02 engineering and technology010501 environmental sciences01 natural scienceslaw.invention020401 chemical engineeringlawBioreactorUrban wastewater (UWW)0204 chemical engineeringFiltrationTECNOLOGIA DEL MEDIO AMBIENTE0105 earth and related environmental sciencesChemistryProcess Chemistry and TechnologySubmerged anaerobic MBR (AnMBR)General ChemistryPulp and paper industryMembraneWastewaterProcess costingSewage treatmentBiochemical engineeringAnaerobic exerciseCAPEXOPEX
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Modelling and cost analysis of hybrid systems for seawater desalination: Electromembrane pre-treatments for Reverse Osmosis

2019

Abstract The need to reduce energy consumption in seawater Reverse Osmosis (RO) process has pushed research towards the development of new hybrid systems in which, for example, other membrane processes can be used to pre-treat seawater. Electrodialysis (ED) and Reverse Electrodialysis (RED) can act as a pre-desalting step before seawater enters the RO unit, thus leading to an important energy saving in RO. In this work, two coupled models are proposed for the RED-RO and ED-RO systems. Each process model was validated. Then a sensitivity analysis was performed to assess the effect of the integration on the overall process cost saving. The analysis was performed by changing ED or RED voltage …

Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciCostGeneral Chemical Engineering02 engineering and technology7. Clean energy020401 chemical engineeringReversed electrodialysisGeneral Materials ScienceSensitivity (control systems)0204 chemical engineeringElectromembrane proceReverse osmosisProcess engineeringSettore ING-IND/19 - Impianti NucleariWater Science and Technologybusiness.industryMechanical EngineeringHybrid proceGeneral ChemistryEnergy consumptionElectrodialysis021001 nanoscience & nanotechnologyAssisted reverse electrodialysi6. Clean waterEnergy consumptionProcess intensificationHybrid systemEnvironmental scienceSeawaterProcess costing0210 nano-technologybusinessDesalination
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