Sewage filtration method for denitrification deep bed filter tank

• Main Authors: CHANG HONG, XU XUEXIANG
• Format: Patent
• Language: Chinese; English
• Published: 10.07.2018
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a sewage filtration method for a denitrification deep bed filter tank. The method includes the steps of: (1) carbon source adding for nitrogen removal: connecting a carbon source adding system to an intake canal over the filter tank to add a carbon source, and utilizing an appropriate amount of high quality carbon source and denitrifying bacteria attaching to and growing onquartz sand surface to convert NOx-N into N2, thus completing the denitrification reaction process; (2) filter tank filtration; (3) aeration and backwashing: installing an aeration device and a backwashing device at the bottom of the filter tank for aeration and backwashing, thus cleaning a filter material layer, a gravel layer and a filter brick layer, restoring good filtering effect, and avoiding blockage; (4) wastewater discharge; and (5) re-filtration. The filtration method provided by the invention adopts a coarse filter material, a deep filter bed and aeration backwashing, and providesbasic guarantee for contin