期刊
JOURNAL OF FOOD ENGINEERING
卷 119, 期 1, 页码 150-158出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jfoodeng.2013.05.019
关键词
Diffusion; Adsorption; Airflow; Plastic; Wood; Cover
资金
- Institute for the Promotion of Innovation by Science and Technology in Flanders [IWT 060720]
- Belgian Association of Fruit and Vegetable Co-operatives (VBT)
- South African Research Chairs Initiative of the Department of Science and Technology
- National Research Foundation
- South African Postharvest Innovation Programme (PHI)
1-Methylcyclopropene (1-MCP) is a synthetic plant growth regulator used commercially to delay ripening of fruits. The substance is applied in gas form (as a fumigant) in the storage room. In long term postharvest cold storage, fruit are placed in boxes (usually plastic or wooden bins) and stacked in a specific pattern. The top of the boxes are frequently covered with a thin plastic sheet for the purpose of reducing fruit moisture loss. Wooden boxes, card linings and other plant based porous materials used in bins have 1-MCP adsorption capacity. Plastic covers affect the airflow and with that the 1-MCP transport. In this paper, the influence of box materials and plastic cover on the distribution of 1-MCP in cold storage was studied using validated CFD models. Reynolds Average Navier-Stokes equations with the SST k-omega turbulence model were used to calculate the airflow. Diffusion, convection and adsorption of 1MCP were modeled to obtain 3D spatial and temporal distributions of 1-MCP inside a storage container, boxes and fruit. Time dependent profiles of calculated 1-MCP concentrations in the air in the container agreed well with measurement data. The plastic cover imposed no effect on the adsorption of 1-MCP. Wooden boxes notably adsorbed 1-MCP from the treatment atmosphere and may reduce the efficacy and uniformity of the treatment. (c) 2013 Elsevier Ltd. All rights reserved.
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