A substrate combining indoor circulating aquaculture filtration and planting

Abstract

The invention discloses a substrate for the combination of indoor circulating aquaculture filtration and planting, which includes three components of biological ceramsite, slag and coral sand. The filter substrate in the breeding area and the cultivation substrate in the planting area. The substrate has a good mechanical interception effect on suspended solids with large particle sizes in the water body; microorganisms grow on the surface of the substrate, and these microorganisms can transform and decompose fish excrement and feed residues, and provide mineral nutrients for plant roots. The substrate also has a good effect of fixing plant roots. Each component of the substrate of the invention is modified, and the modified substrate can effectively reduce the contents of total phosphorus, ammonia nitrogen and COD in the water body. After 7 days of treatment, the content of ammonia nitrogen in the water body of the breeding area can be as low as 0.19mg / L, the content of total phosphorus can be as low as 0.03mg / L, and the content of COD can be as low as 4.1mg / L. After 30 days, no plant death phenomenon was found, and the plants grew normally.

Description

technical field [0001] The invention belongs to the technical field of filter media, and in particular relates to a substrate combining indoor circulating aquaculture filtration and planting. Background technique [0002] In the recirculating culture system combining plant cultivation and aquaculture, the water body of aquaculture and plant cultivation can be recycled. However, the aquaculture water body is easily polluted by fish excrement and feed residues, which deteriorates the water quality and unbalances the ecological environment of the aquaculture water body, which not only affects the growth and reproduction of the aquaculture objects, but also leads to the occurrence of various explosive diseases. At the same time, the untreated sewage in the breeding area enters the plant cultivation area, which cannot provide enough nutrients for the plants, and the plants appear to be deficient in fertilizer, resulting in the death of the plants, and the recirculation breeding s...

AI Technical Summary

Problems solved by technology

However, the carrying capacity of biodegradation is still limited, and the conversion process of fish excrement and feed residue is slow and the efficiency is low. Therefore, the water quality often deteriorates and plants cannot get sufficient nutrients, resulting in poor growth of fish and plants, and cycle The ecological stability of the system is poor, and it is difficult to get real promotion and application