2024 Volume 47 Issue 3 Pages 85-93
Artificial drainage was poured into two types of bamboo-type slanted-soil-chamber: a device planted with kenaf (here after, “with kenaf”) and a device that was not planted with kenaf (here after, “without kenaf”) . The difference in purification performance was then studied. As a result, the average biochemical oxygen demand (here after, BOD) removal rates of “with kenaf” and “without kenaf” were 87% and 79%, respectively. The removal rates of total nitrogen and total phosphorus in “with kenaf” were 13% and 8% higher than those in “without kenaf”, respectively. Of the removed phosphorus and nitrogen, the percentages absorbed by kenaf were 29% and 45%, respectively. The kenaf in the device absorbs a maximum of approximately 1 L per 10 L of daily water flow and increases the water retention capacity in the device. Furthermore, the roots spread around the device, lengthening the residence time of what it was found that by planting kenaf in a slanted-soil-chamber device, not only the removal of nitrogen and phosphorus by direct absorption but also the effect of indirect purification through BOD level reduction can be expected.
