| 摘要 |
PROBLEM TO BE SOLVED: To provide a discharge type wastewater denitrification equipment which is simple in operation, does not need special management can be installed in a small installation area, is inexpensive and free from toxity problem, can be hardly affected by temperature, and can obtain an enough denitrification effect even in a large scale wastewater treatment such as stockbreeding wastewater treatment, while the features of a biological denitrification method are being utilized. SOLUTION: In the wastewater denitrification equipment in which air permeable soil 4 is packed in a space 2 with its upper part opened which is formed in an earth 1 by a water impermeable member 3, a water collecting pipe 5 is installed on the bottom surface of the space 2, a treatment water soaking member 6 is installed above the pipe 5, embankment 8 is carried out over the outside of the member 3 in the upper part of the space 2, and treated wastewater is supplied to the member 6, and after being denitrified by being soaked in the soil 4, is discharged from the pipe 5, a water permeable iron layer 7 is formed in the soil 4 between the member 6 and the pipe 5.
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