| 摘要 |
PROBLEM TO BE SOLVED: To utilize a small-sized inexpensive sterilizing apparatus meeting the flow rate and the sure sterilization of waste liquid. SOLUTION: This liquid feeding apparatus for plant cultivation is provided with a 1st waste-liquid tank 2 storing waste liquid discharged from a culture bed 8 and a 2nd waste-liquid tank 3 connected to the 1st waste-liquid tank 2 and storing the waste liquid discharged from the 1st waste-liquid tank 2. A sterilization apparatus 5 for sterilizing the waste liquid supplied from the 1st waste-liquid tank 2 to the 2nd waste-liquid tank 3 is placed between the 1st waste-liquid tank 2 and the 2nd waste-liquid tank 3. Since the quantity of the waste liquid supplied from the 1st waste-liquid tank 2 to the 2nd waste- liquid tank 3 is constant, the use of a large-sized sterilizing apparatus for coping with the flow of a large amount of waste liquid is unnecessary. |
