SYSTEM AND METHOD FOR TREATING NITRATE NITROGEN SEWAGE BY CONSTRUCTED WETLAND
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United States of America Patent
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Issued Date -
Aug 22, 2024
app pub date -
Feb 7, 2024
filing date -
Feb 21, 2023
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Abstract
A system for treating nitrate nitrogen sewage by autotrophic denitrification subsurface flow constructed wetland and a method thereof. The system includes a wetland pool body, a wetland substrate, a water distribution device, a water outlet device, and plants. The wetland substrate is filled in the wetland pool body. The wetland substrate includes pyrite, volcanic rock, and biochar. The water distribution device is located at the top of the wetland pool body to distribute water into the wetland pool body, and the water outlet device is located at the bottom of the wetland pool body to collect treated sewage. The plant is planted in the wetland substrate. The dissolved oxygen concentration of the system for treating nitrate nitrogen sewage by autotrophic denitrification subsurface flow constructed wetland is maintained at 1.2˜2.8 mg/L.
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