Purification system for integrated culture of fishes and shrimps

Abstract

The invention provides a purification system for integrated culture of fishes and shrimps. The purification system comprises an integrated vertical subsurface flow wetland, a river channel, a water purification pond, a water storage pond and a culture pond, wherein the integrated vertical subsurface flow wetland is used for preliminary purification of a water source; the river channel is connectedwith the integrated vertical subsurface flow wetland through a water pipe for further water quality purification; the water purification pond and an outlet end of the river channel are isolated by anoverflow dam, thus promoting water quality; an inlet end of the water storage pond and an outlet end of the water purification pond are isolated by a subsurface flow dam; an outlet end of the water storage pond is isolated from the integrated vertical subsurface flow wetland by an isolating device; after the water quality is finally purified and monitored, water flows into the culture pond through a water pump; and freshwater shrimps and Ietalurus punetaus are mixed-cultured in the culture pond, and culture wastewater in the culture pond flows into the river channel through a drainage channelfor purification, and the water in the river channel then flows into the water purification pond and the water storage pond for circular purification. According to the purification system, by employing a four-stage water purification treatment system, the aquaculture wastewater can be used after being circularly purified, and zero wastewater discharge is almost realized, thereby avoiding pollution to the surrounding water environment.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a purification system for comprehensive farming of fish and shrimp. Background technique [0002] The scientific name of freshwater shrimp is Macrobrachium nipponense, commonly known as river shrimp, grass shrimp, and lake shrimp. It belongs to Crustacea and Macrobrachium, and is widely distributed in freshwater waters in my country. It has the advantages of high fecundity, strong adaptability, rich nutrition, delicious meat, and can be marketed all year round. It is a famous and precious aquatic product loved by the masses, and it is also an important freshwater cultured shrimp in my country. Due to the reduction of natural output and the low output of artificial breeding, freshwater shrimp in the market cannot meet the market demand all the time. [0003] my country's freshwater shrimp farming model has gradually transitioned from the original extensive farming...

AI Technical Summary

Problems solved by technology

At present, in most cases, the tail water is simply discharged through the drainage ditch, which will cause relatively large pollution. Some farms will use biospheres or filters to filter and treat the tail water, but this method can only filter out the tail water. Large particles of impurities in the water cannot achieve the purpose of decontamination; a small number of farms will use equipment such as protein separators to purify the tail water. However, at present, these tail waters are usually discharged directly after passing through several purification equipment in sequence out, there will still be more toxic and harmful substances in the treated tail water, which will still cause great pollution to the environment

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