Denitrification constructed wetland purification method suitable for tail water of sewage plant

• Main Authors: CHEN TAO, ZHANG PEI, LI NAN, LI JING, JING ZHONGQIU, JIAO JUNXIA
• Format: Patent
• Language: Chinese; English
• Published: 06.06.2023
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

According to the denitrification constructed wetland purification method suitable for the tail water of the sewage treatment plant, the problems that a wetland system is low in nitrogen and phosphorus removal capacity and poor in winter sewage purification effect are effectively solved, the tail water of the sewage treatment plant enters a biological enhancement clarification tank, a cellulose carbon source slowly releases a biodegradable carbon source after being soaked, the biodegradability is improved, and suspended solids are reduced by aquatic plants; the tail water flows into an upflow vertical subsurface flow constructed wetland, microorganisms attached to the inner surface of a mixed matrix carry out deep denitrification on the tail water through denitrification, emergent aquatic plants are planted on the upper surface layer of the wetland, and the situation that the concentration of dissolved oxygen in the tail water is too low and stink is caused is prevented through photosynthesis reoxygenation; ef