Combined artificial wetland process system for nitrogen and phosphorus removal

Abstract

The invention discloses a combined artificial wetland process system for nitrogen and phosphorus removal. The combined artificial wetland process system comprises a water incoming pipe, a water outgoing pipe and combined artificial wetlands mutually connected serially between the water incoming pipe and the water outgoing pipe, each combined artificial wetland comprises an aerobic biological pond in the upper reach and an artificial wetland in the lower reach, and each artificial wetland comprises a plurality of artificial wetland units; in the artificial wetland of the first combined artificial wetland, the artificial wetland units are parallelly connected mutually and are all vertical underflow artificial wetland units; in the artificial wetland of each of other combined artificial wetlands except for the first combined artificial wetland, the artificial wetland comprises a plurality of groups formed by the artificial wetland units which are serially connected mutually, and the groups are mutually connected parallelly; the artificial wetland units in each group include horizontal underflow artificial wetland units and surface flow artificial wetland units. The combined artificial wetland process system has an efficient nitrogen and phosphorus removal function and can obviously improve water quality.

Description

technical field [0001] The invention relates to a composite constructed wetland process system for denitrification and phosphorus removal, which belongs to the sewage treatment system of the constructed wetland. Background technique [0002] Constructed wetland sewage treatment system is a new type of sewage treatment technology developed in the 1980s. Compared with traditional sewage secondary biochemical process, constructed wetland has good water purification effect, simple process equipment, strong adaptability to load changes, The project has the characteristics of low construction and operation costs, significant ecological and environmental benefits, and the possibility of recycling waste water, suitable for decentralized or non-point source sewage treatment, etc. has been more and more widely used. [0003] At present, my country's constructed wetland sewage treatment projects generally use a single type of wetland. A large number of engineering practices have show...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the constructed wetlands in the prior art have a single type of technology, the composite constructed wetlands have poor nitrogen and phosphorus removal effects, and the design of the composite constructed wetlands is unreasonable, and a composite constructed wetland with high efficiency nitrogen and phosphorus removal is provided The process system solves the problems of poor landscape effect, low comprehensive treatment efficiency and unstable effluent quality in the current artificial wetland, especially realizes the first-class B standard tail water of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) Deep purification to Class A emission standard

Images