Mulching-film sand filter pond and method for disposing of raw water used for prawn culture

Abstract

The invention relates to a mulching-film sand filter pond and method for disposing of raw water used for prawn culture, wherein the pond comprises a mulching film pond, active carbon, sand, a polyvinyl chloride (PVC) pipe, a filter screen, a water collecting pond and a mulching film, wherein the bottom of the water collecting pond is lower than the mulching film pond, and the PVC pipe is communicated with the water collecting pond. Outside seawater is subjected to primary treatment by a foam separator, secondary treatment by an ozone generator, and tertiary treatment by mesh filtration of a 200-mesh mesh bag, then is introduced into the sand filter pond, and is subjected to quaternary treatment by filtration of the active carbon and fine sand; and the treated seawater is collected into the water collecting pond through the pored PVC pipe, and is pumped into a water inlet channel from the water collecting pond by a water pump and then enters a culture pond. The mulching-film sand filter pond and method have the advantages of realizing efficient treatment of culture water, having wide-range geographical adaptability, being applicable to sea area the substrate of which is mud or rocks and not suitable for building a sand filter system, treating the raw water used for culture simply and conveniently, reducing the occurrences of diseases and water pollution, greatly improving the success rate of prawn culture and yield, and having an extremely high use value.

Description

technical field [0001] The invention relates to a plastic film sand filter pond and a method for treating raw water for prawn cultivation. technical background [0002] Shrimp aquaculture is the pillar industry of marine aquaculture in my country. In 1992, the aquaculture area exceeded 140,000 hectares, and the output was 220,000 tons, with an average output of 1.57 tons per hectare. Since 1993, the output of shrimp farming began to decline. In 1995, my country had only 50,000 tons, with an average yield of 0.36 tons / ha. From 1993 to 1995, the annual direct economic loss of the shrimp farming industry reached 3 billion yuan. [0003] Diseases have become the most important restrictive factors for the shrimp farming industry in my country. Since the outbreak of shrimp virus diseases in Fujian and eastern Guangdong in 1992, especially white spot syndrome (white spot syndrome, WSS), since it became popular in the whole country in 1993, WSS has become the most serious disease ...

AI Technical Summary

Problems solved by technology

Chemical treatment of aquaculture water is used, and chlorine-containing disinfectants are often used, which is prone to residues

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