Water purification system for artificial wetland based on oyster shell and carbon fiber

Abstract

The invention relates to a water purification system for artificial wetland based on oyster shell and carbon fiber. The system includes along the direction of water flow placed in sequence a water inlet grille tank, an anaerobic tank, an anoxic tank, a first grade aerobic digester, a second grade aerobic digester, an artificial wetland, a water outlet grille tank; inside the anaerobic tank and the anoxic tank are placed with oyster shell active sludge reactive barriers, inside the first grade aerobic digester and the second grade aerobic digester are placed with carbon fiber biofilm reactive barriers, the first grade aerobic digester and the second grade aerobic digester are both connected with an aeration device, the artificial wetland whose top part is planted with aquatic plants includes a sand feeding processing layer, an oyster shell feeding processing layer and a gravel feeding processing layer placed in sequence from the top to the bottom. The present invention also relates to a water purification system for artificial wetland based on oyster shell and carbon fiber. The present invention not only solves the low efficiency problem in nitrogen and phosphorus removal in sewage treatment system, but also lowers the infrastructure and operation costs of sewage treatment system to about half of the operation cost of routine biochemical treatments; it belongs to the technical field of sewage treatment.

Description

technical field [0001] The invention relates to sewage treatment technology, in particular to a water purification system and method based on oyster shell-carbon fiber-constructed wetland, which is suitable for the purification treatment of various urban and rural domestic sewage. Background technique [0002] my country's current economic development is rapid. Under the situation of serious water pollution and water shortage, it is of great significance to build a sewage purification and treatment system with safe and stable operation, high treatment efficiency and low operating cost. [0003] There are many purification and treatment methods for urban and rural sewage, such as chemical redox method, chemical precipitation method, membrane separation method, biochemical method, and constructed wetland method. Modern sewage treatment processes are generally divided into primary, secondary and tertiary (advanced treatment). The biofilm method is one of the most widely used a...

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Problems solved by technology

Generally, there are various secondary treatments (activated sludge method and biofilm method) used in sewage treatment plants, such as oxidation ditch process, AB process, SBR process, CASS process, MBR process, etc., but the main control indicators of these processes are organic matter , suspended solids, etc., the control effect on nitrogen and phosphorus is not ideal, and it is difficult to meet the requirements only after the sewage is discharged to a high-standard receiving water body or reused as reclaimed water after primary and secondary treatment. To achieve denitrification The purpose of phosphorus removal also needs to add some sewage tertiary treatment measures behind these processes

The use of artificial wetland technology for sewage treatment has been widely used. The aquatic and wet plants implanted on the sand-based wetland filler have low removal efficiency for pollutants in sewage, especially the low removal rate of phosphorus. The wetland filler carrier The microbial biomass on the surface is small, and the absorption efficiency of phosphorus by the roots of aquatic and wet plants implanted on the wetland filler is low

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