Refrigeration and Freezing

Controlled Atmosphere (CA) storage of apples and pears extends storage life by:

Options:

• (A) Lowering $O_2$ concentration ($1-3\%$) and elevating $CO_2$ ($1-5\%$) at low temperature ($0-4^\circ\text{C}$) to suppress fruit respiration and ethylene synthesis
• (B) Filling the room with $100\%$ pure oxygen
• (C) Heating to $40^\circ\text{C}$
• (D) Spraying ethanol vapor