Fishpond for aquaculture by utilizing marsh

Abstract

The invention discloses a fishpond for aquaculture by utilizing marsh in the field of aquaculture. The fishpond comprises an inclined pond stem which is encircled into a rectangle along the periphery of the fishpond; the fishpond is sequentially divided into a water inlet layer, an adjusting water layer and a drainage layer from the high position to the low position of the water level; a planting layer for planting hybrid pennisetum is arranged from the adjusting water layer to the top of the pond stem; the planting layer faces the inner side of the fish pond and is provided with a transverse biogas slurry water inlet drip irrigation pipe; the biogas slurry is used for planting grass and culturing fish, and a food chain composed of organic matter, bacteria, algae, plankton, fish and the like is mainly used; nutrient substances and water are provided for the grass by quickly and fully utilizing nutrient substances of the biogas slurry; and abundant baits are provided for fishes. The invention has the characteristics of low capital construction investment, bait saving, low breeding cost, high yield, good benefit and convenience in management, and can also solve the environmental problem.

Description

technical field [0001] The invention belongs to the field of aquaculture, in particular to a fishpond for aquaculture using swamps. Background technique [0002] Biogas slurry is the waste water produced by anaerobic fermentation of fecal sewage in livestock and poultry breeding industry. Anaerobic fermentation can kill pathogenic bacteria and diseased eggs in feces, and the removal rate is as high as 98%. Livestock manure sewage is rich in feed nutrients that have not been digested and absorbed by livestock and poultry. After anaerobic fermentation, it is not only rich in bacterial protein, but also contains a variety of peptide proteins, amino acids, vitamins, undecomposed organic matter, trace elements and unknown These nutrients help to improve the immune function and disease resistance of fish. Therefore, biogas slurry is nutrient-rich wastewater that can be safely used as fish bait; and biogas slurry also contains a large amount of soluble nitrogen, phosphorus, Potass...

AI Technical Summary

Problems solved by technology

[0003] However, with the intensive and large-scale development of the livestock and poultry breeding industry, a large amount of aquaculture wastewater has been discharged in a concentrated manner, and the biogas slurry produced by its anaerobic fermentation is generally difficult to match with enough arable land for utilization and consumption in most parts of the south. Due to the large amount of biogas slurry produced It is large, and the consumption of returning to the field is limited. If the biogas slurry is not effectively used, it must be purified, otherwise direct discharge will cause environmental pollution.

[0004] However, there are many fish ponds and valleys in the south, and the construction of fish ponds using these land types is simple in design and low in investment, and after the manure is anaerobically fermented, the biogas slurry produced can remove more than 98% of the pathogenic bacteria and disease eggs in the manure. Restrictions on the discharge of wastewater from livestock and poultry farming, the concentration of pollution in wastewater is higher, and the biogas slurry produced by anaerobic fermentation has a higher NH 3 As high as 1000mg / l or more, if it is directly used for fish farming in fish ponds, it is easy to cause NH in fish ponds 3 poisoning death

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