In-situ water treatment method of increasing cultivation density of testudines

Abstract

The invention discloses an in-situ water treatment method of increasing cultivation density of testudines. The testudines with similar weights are cultivated in higher density in a cultivation pond in a greenhouse (water temperature of 30-32 DEG C); in-situ treatment is performed on a cultivation water body in the cultivation pond by a microfilter; the cultivation water body is filtered by a filter screen on the microfilter; solid particulates with larger particle sizes are intercepted by the filter screen and directly discharged into a blowdown pond through a blowdown port of the microfilter; filtered water flows back into the cultivation pond through a water outlet of the microfilter; the microfilter adopts an intermittent starting mode. The method has the characteristics that temperature stability of the water body is kept well; an effect of removing the suspended solid particulates is good; the cultivation density and yield of the testudines can be increased; the method is simple to operate, high in economy, environment-friendly and the like.

Description

technical field [0001] The invention belongs to the field of aquaculture engineering in industrialized greenhouses, and relates to the treatment of turtle breeding sewage, in particular to an in-situ water treatment method for increasing the breeding density of turtles. Background technique [0002] China is the country with the largest scale of turtle breeding in the world. According to the "2016 China Fishery Statistical Yearbook", the number of juvenile turtles in 2015 was 89.69 million, and the number of juvenile turtles was 657.01 million; in 2015, the output of turtle breeding in my country was 43487 tons. The output of turtle breeding is 341588 tons. my country's turtles have basically entered the market dominated by public consumption. [0003] The breeding density of turtles in greenhouses is high. In order to maintain the temperature and the stability of the growth environment of turtles and save energy, it is not possible to change the water frequently or only a s...

AI Technical Summary

Problems solved by technology

[0003] The breeding density of turtles in greenhouses is high. In order to maintain the temperature and the stability of the growth environment of turtles and save energy, it is not possible to change the water frequently or only a small amount each time. These characteristics make the breeding water extremely easy to deteriorate. The water contains high concentrations of ammonia nitrogen and nitrite, causing poisoning and death; in addition, farmers who are not environmentally conscious will discharge the breeding sewage at will, which seriously damages the ecological environment and is not conducive to the healthy development of the industry

[0004] Since the feed utilization rate of turtles and turtles is only about 70% to 80%, there is a large amount of residual bait in the water body, coupled with the excrement of turtles and turtles, which together lead to a high content of suspended solids in the breeding water, while the conventional Water treatment methods are difficult to remove these particles that will deteriorate the water quality. Once they stay in the water for too long, they will be poisonous to the turtles. If the dead turtles are not cleaned up in time, it will cause cross-infection, resulting in other turtles in the same breeding pond. rapid, mass death

[0005] At present, the water treatment method for turtle breeding in greenhouses is often to replace a certain amount of water when the water quality deteriorates and the turtles are poisoned and die. This will not only increase the energy consumption required to heat fresh water, but also affect the life of turtles. The stability of the environment, when the turtles meet the market conditions, all the sewage will be discharged, and the sludge at the bottom of the breeding pond will be completely removed. This will cause solid waste not to be removed in time during the breeding process, which will cause poisoning to the turtles At the same time, the discharge of a large amount of sewage will also cause environmental pollution

Patent No. CN201310153960.7 discloses an ecological combination method for treating wastewater from turtle greenhouse cultivation, which is to return the sewage to the breeding pond through the regulating pond, ecological ditch, artificial wetland, purification pond, and sedimentation pond. Although the treatment effect is stable, However, a large amount of heat will be lost during the treatment process, which will increase the energy consumption required for subsequent heating of the water body

Patent No. CN201610347603.8 discloses a high-efficiency and low-pollution greenhouse soft-shelled turtle culture system and a method for recycling cultured wastewater. Using a culture pond, a fish pond, and a grass pond in series to treat the culture wastewater will also cause the water body to lose a lot of heat, CN201210035280. Patent No. 0 discloses a treatment method for greenhouse soft-shelled turtle breeding wastewater. The sewage is purified through a sedimentation tank, an enhanced biological filtration system, and a deep-flow hydroponic vegetable bed. However, it is difficult for the sedimentation tank to remove small particles in the water body. Particulate matter has always existed in the aquaculture water, which has an impact on the growth of turtles

Moreover, these methods do not consider increasing the breeding density of greenhouse turtles, but purely from the purification of water quality.

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