Technical and economic evaluation of ambient and chilled aeration strategies to maintain the quality of paddy rice during storage in a tropical climate
Vortrag
DOI:
https://doi.org/10.5073/jka.2018.463.073Schlagworte:
paddy rice, ambient aeration, grain chilling, economic feasibilityAbstract
Warm and moist conditions of some tropical climate regions make it difficult to use ambient aeration to cool stored grain, which contributes to pest problems and increases dependence on chemical control as part of grain management strategies. Grain chilling is a non-chemical alternative to cool grain stored under high risk climatic conditions. The objective of this research was to use computer simulation to evaluate the technical and economic viability of using grain chilling compared to four ambient aeration strategies developed for paddy rice stored under the tropical climatic conditions of the North Pacific coast of Costa Rica. The minimum grain temperature achieved through ambient aeration at the end of the six-month simulated storage period was 30.8°C, using an aeration strategy based on a grain-ambient temperature differential greater than 10°C. Grain chilling lowered the average grain temperature from 35°C to below 15°C in 117 hours and the maximum average temperature it registered after six months of storage was 15.5°C. The economic evaluation of the ambient aeration and chilling strategies determined that the operational costs of grain chilling were 1.83 US $/t lower than ambient aeration plus chemical control of pests. However, the initial cost of the grain chiller made the net present cost (NPC) of the grain chilling strategy 0.22 US $/t higher than the cost of ambient aeration plus chemical control over a 10-year analysis. Several potential financial options were analyzed to make the grain chiller economically feasible for a rice miller in Costa Rica.
Downloads
Veröffentlicht
Ausgabe
Rubrik
Lizenz
Dieses Werk ist lizenziert unter einer Creative Commons Namensnennung 4.0 International Lizenz.
Sie dürfen:
- Teilen — das Material in jedwedem Format oder Medium vervielfältigen und weiterverbreiten
- Bearbeiten — das Material remixen, verändern und darauf aufbauen und zwar für beliebige Zwecke
Unter folgenden Bedingungen:
-
Namensnennung — Sie müssen die Namen der Autoren und den Titel des Werkes angeben, einen Link zur Lizenz beifügen und anmerken, ob Änderungen vorgenommen wurden.
- Keine weiteren Einschränkungen — Sie dürfen keine zusätzlichen Klauseln oder technische Verfahren einsetzen, die anderen rechtlich irgendetwas untersagen, was die Lizenz erlaubt.