Management and Economics wood
Sina Mohamadi Nematabad; Shademan Pourmousa; Ajang Tajdini; Ahmad Jahan latibari; Amir Lashgari
Abstract
The applied purpose of this study is to determine and prioritize the components of production sustainability in the courrugated box making industry by using qualitative analysis.Through library studies and review of available resources, seven main components affecting the sustainability of production ...
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The applied purpose of this study is to determine and prioritize the components of production sustainability in the courrugated box making industry by using qualitative analysis.Through library studies and review of available resources, seven main components affecting the sustainability of production in the courrugated box making industry were named: rules and regulations, economic, environmental, technological, social, human resourcess, materials and products and 43 sub-components were identified.By preparing researcher-made questionnaires and distributing it among managers and experts in the courrugated box making industry with the aim of influencing each component and sub-component on production sustainability and their current status, the results were analyzed by relevant tests. All components affecting production stability based on standard coefficients and significance of structural equations as well as predictive criteria for confirmation and quality of data presented with redundancy index with cross-validity showed that the data have the necessary validity to predict. The components were prioritized based on average rank and distance to stability. Based on the results, economic, material, product and technological components showed the shortest distance and bio-environmental components, rules and regulations showed the longest distance to achieve stability in the carton industry. Therefore, in order to achieve sustainable production in the carton industry, environmental components, laws and regulations must be given more attention. Research components were prioritized based on average rank and distance to stability. Based on the results, economic, material and product and technological components showed the shortest distance but environmental, rules and regulations components, showed the longest distance to achieve stability in the industry. Therefore, in order to achieve sustainable production in the industry, environmental, laws and regulations components must be given more attention.
Pulp and paper
Abdolrahim Mohebalian; Ahmad Jahan latibari; Ajang Tajdini; Shadman Pourmosa
Abstract
In this research, the influence of two temperatures (60 and 90°C) and three dosages of sodium hydroxide (5, 7.5 and 10%, based on the dry weight) on hornbeam wood chips alkaline pre-hydrolysis and soda pulping was studied. Soda pulping of both pre-hydrolyzed and control chips were conducted applying ...
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In this research, the influence of two temperatures (60 and 90°C) and three dosages of sodium hydroxide (5, 7.5 and 10%, based on the dry weight) on hornbeam wood chips alkaline pre-hydrolysis and soda pulping was studied. Soda pulping of both pre-hydrolyzed and control chips were conducted applying constant pulping variables. The effect of pre-hydrolysis on hemicelluloses removal and sodium hydroxide consumption and pulp characteristic including total yield, reject, pulp freeness, kappa number, and pulp strengths were measured and statically analyzed. In case the effect of variable on measured property was statistically significant, then Duncan multiple range grouping of the measured property was arranged. The result revealed that pre-hydrolysis removed almost 4.2% (based on dry wood) of hemicelluloses of the wood and pre-hydrolysis demonstrated easier soda pulping delignification, due to weakening the lignin-carbohydrate bonds and both total yield, reject and kappa number were reduced. Tensile strength index of the pulp produced using pre-hydrolyzed chips war lower and as the dosage of sodium hydroxide increases, the tensile strength index was reduced initiated from the removal of hemicelluloses which is also lower than control pulp, Tear strength index of the soda pulp from pre-hydrolyzed chips was mildly reduced which is anticipated to be the consequence of fiber weakening and fiber breaking during cooked chips defibration. The effect of pre-hydrolysis variables on tear strength was not statistically significant. Based on the result of this study, hornbeam wood can be a potential source of bio-refining based on lignocellulosic material.
