Multiple-technique coupled efficient constructed wetland treatment system and method

Abstract

The invention discloses a multiple-technique coupled efficient constructed wetland treatment system and method, realizing effective combination of air-BAF (biological aerated filter) system and a wetland oxidation system by a BAF-wetland coupling reactor. Organic pollutants of waste water are oxidized under strong oxidation action of the air-BAF, so that biodegradability of waste water is improved, waste water is oxygenated, and organic pollutants of the waste water are removed effectively; as the formula of composite ceramsite is changed, specific pollutants can be removed effectively, and especially removal of phosphorus, heavy metal and the like is strengthened. Further, the BAF-wetland coupling reactor improves impact-resistant loading capacity of the system to the pollutants of wastewater, pollution load to the follow-up system is reduced, floor occupation of the follow-up system is reduced, and accordingly the system refers to a waste water treatment system with high impact-resistant loading capacity, efficient and stable treatment efficiency and low operation cost, and the system and method can be applied to treatment on urban sewage plant secondary effluent, rainwater, polluted surface runoff broadly.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a multi-technology coupled high-efficiency artificial wetland treatment system and method. Background technique [0002] Constructed wetlands are an artificial ecosystem developed in the 1970s and 1980s. They are mainly divided into surface flow constructed wetlands (FWS), subsurface flow constructed wetlands (SFS) and tidal flow constructed wetlands. It can be used for advanced treatment of urban sewage treatment plant drainage, rainwater, rural domestic sewage and surface runoff. It has excellent characteristics such as low investment and operation costs and good environmental benefits. [0003] Due to the current large population and small per capita land area, the land use of constructed wetlands is largely limited, and high hydraulic load conditions are often used for design and operation. At the same time, based on the diversity and complexity of pollut...

AI Technical Summary

Problems solved by technology

[0003] Due to the current large population and small per capita land area, the land use of constructed wetlands is largely limited, and high hydraulic load conditions are often used for design and operation. At the same time, based on the diversity and complexity of pollutants in different surface runoffs and wastewater, As a result, the traditional constructed wetland system has weak load impact resistance to pollutants and poor system operation stability

On the other hand, the artificial wetland filling materials (stone, sand, etc.) are easy to clog, which seriously affects the removal effect of the constructed wetland system on pollutants, increases the difficulty of operation, and increases the cost of operation and maintenance.

At present, no effective sterilization and disinfection measures have been taken for the effluent of the constructed wetland system, and there are certain risks in ecological security.

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