Industrial mariculture efflux water recycling and utilization system based on constructed wetlands, and method thereof

Abstract

The present invention discloses an industrial mariculture efflux water recycling and utilization system based on constructed wetlands, and a method thereof. With the system and the method, two grades of constructed wetlands are connected in series to treat the mariculture efflux water, the sewage and the sludge are subjected to the harmless treatment, and are recycled and utilized. According to the present invention, the mariculture efflux water is pretreated by a sedimentation tank, and enters a first grade surface flow constructed wetland and a second grade upward vertical flow constructed wetland; the resulting water is subjected to a purification treatment, enters a water reservoir, and is reused; the sludge enters a sludge collecting tank from the sedimentation tank, and is treated by biological composting to be adopted for planting salt-tolerant vegetables; with the backwashing principle, the matrix clogging of the constructed wetlands is aperiodically recovered; compared to the mariculture efflux water treatment method in the prior art, with the method of the present invention, the denitrification and phosphorus removal effect is enhanced, the investment cost and the operating cost are low, the method has characteristics of high performance, ecology, environmental protection and economy, and is applicable for popularization and application.

Description

technical field [0001] The invention relates to a method for treating the external drainage of aquaculture, in particular to a system and method for treating the external drainage of mariculture by using artificial wetlands. Background technique [0002] In the past 20 years, my country's aquaculture industry has developed rapidly. According to statistics, my country's aquaculture production reached 35.97 million tons in 2006, accounting for 68% of my country's total fishery production and more than 70% of the world's total aquaculture production. It is currently the only country where aquaculture production exceeds fishing production. At present, the water body of industrialized aquaculture in my country has reached 5 million m 2 , it is expected that there will be a greater development in the future. Therefore, due to the continuous expansion of aquaculture scale, the deepening of intensification, and the lagging of environmental protection measures, the discharge of aqu...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a system and method for recycling external drainage of industrial mariculture with good water purification effect, low investment and operating costs, simple and convenient operation, and unification of economic benefits, social benefits and ecological benefits; And overcome its weak salt tolerance, poor denitrification and dephosphorization effects, and easy clogging of the matrix through technological invention and transformation

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