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Device and method for recovering nitrogen and phosphorus in residual bait and excrement generated by aquaculture

A technology for aquaculture and residual bait, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problem of low recycling rate

Inactive Publication Date: 2020-06-16
GUOTOU BIO TECH INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a recycling method for reclaiming the residual bait produced by aquaculture and the nitrogen and phosphorus in the excrement in order to overcome the low recycling rate of nitrogen and phosphorus in the residual bait and excrement produced by aquaculture in the prior art. Method and device thereof, the method and device can effectively realize the degradation of residual bait and feces, and at the same time can maximize the recycling of nitrogen and phosphorus in residual bait and feces

Method used

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  • Device and method for recovering nitrogen and phosphorus in residual bait and excrement generated by aquaculture
  • Device and method for recovering nitrogen and phosphorus in residual bait and excrement generated by aquaculture
  • Device and method for recovering nitrogen and phosphorus in residual bait and excrement generated by aquaculture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] (1) The liquid to be treated that contains residual bait and ight soil is passed in the sedimentation anaerobic pond 1 (as figure 1 Shown), the feed rate is 528L / min, carry out hydrolysis acidification pretreatment through Bifidobacterium (composition and content are as shown in Table 1), obtain treatment liquid-I, wherein, said Bifidobacterium (in three-dimensional Elastic filler is the dosage of carrier) accounts for 0.6% of the volume of sedimentation anaerobic tank 1;

[0074] (2) The treatment solution-1 is passed into the facultative tank 2 (the number of baffles is 10), and denitrification and degradation reactions are carried out through facultative anaerobic microorganisms (composition and content are as shown in Table 1), to obtain Treatment liquid-II, wherein, the dosage of described facultative anaerobic microorganisms (with combined filler as carrier) accounts for 0.6% of the volume of facultative anaerobic tank 2 (combined filler is fixed on the surface of...

Embodiment 2

[0079] (1) The liquid to be treated that contains residual bait and ight soil is passed in the sedimentation anaerobic pond 1 (as figure 1 Shown), the feed rate is 528L / min, carry out hydrolysis acidification pretreatment through Bifidobacterium (composition and content are as shown in Table 1), obtain treatment liquid-I, wherein, described Bifidobacterium (with porous Suspended ball filler is the carrier) and the dosage accounts for 0.8% of the volume of sedimentation anaerobic tank 1;

[0080] (2) The treatment solution-1 is passed into the facultative tank 2 (the number of baffles is 6), and denitrification and degradation reactions are carried out through facultative anaerobic microorganisms (composition and content are as shown in Table 1), Obtain treatment liquid-II, wherein, the dosage of described facultative anaerobic microorganism (with composite packing as carrier) accounts for 0.7% of the volume of concurrent oxygen tank 2 (combined packing is fixed on the surface ...

Embodiment 3

[0085] (1) The liquid to be treated that contains residual bait and ight soil is passed in the sedimentation anaerobic pond 1 (as figure 1 Shown), the feed rate is 528L / min, carry out hydrolysis acidification pretreatment through Bifidobacterium (composition and content are as shown in Table 1), obtain treatment liquid-I, wherein, said Bifidobacterium (in three-dimensional Elastic filler is the dosage of carrier) accounts for 0.7% of the volume of sedimentation anaerobic tank 1;

[0086](2) The treatment solution-1 is passed into the facultative tank 2 (the number of baffles is 4), and denitrification and degradation reactions are carried out through facultative anaerobic microorganisms (composition and content are as shown in Table 1), Obtain treatment liquid-II, wherein, the dosage of described facultative anaerobic microorganisms (with composite filler as carrier) accounts for 0.8% of the volume of concurrent aerobic pond 2 (combined filler is fixed on the surface of baffle...

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Abstract

The invention relates to the field of aquaculture, and discloses a device and a method for recovering nitrogen and phosphorus in residual bait and excrement. The device comprises a precipitation anaerobic tank, a facultative tank, an aerobic tank and an active carbon adsorption tank which are communicated in sequence, and is used for recovering nitrogen and phosphorus contained in residual bait and excrement generated by aquaculture. The method comprises the following steps: introducing a to-be-treated liquid containing residual bait and excrement into the device for recovering nitrogen and phosphorus in the residual bait and excrement, purifying, and recycling the purified water rich in nitrogen and phosphorus. According to the method and the device, degradation of residual bait and the excrement can be effectively realized while nitrogen and phosphorus in the residual bait and the excrement can be recycled to the maximum extent.

Description

technical field [0001] The invention relates to the field of aquaculture, in particular to a device and method for recovering nitrogen and phosphorus in residual bait and feces. Background technique [0002] The accumulation and decomposition of residual bait and feces in the process of high-density aquaculture will cause water pollution, destroy the ecological balance, breed pathogenic bacteria, and cause aquatic product virus damage. [0003] In April 2013, the U.S. Soybean Export Association introduced the low-carbon and high-efficiency pond circulating water fish farming technology to the Chinese market. This technology is to concentrate the excrement and residual bait generated during the breeding process into the septic tank, and then concentrate the discharge to avoid However, in the actual operation of the production process, the effect of centralized waste treatment is not obvious, and the full recycling of nitrogen and phosphorus in residual bait and manure cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/20C02F101/10C02F101/16
CPCC02F3/302C02F1/283C02F2103/20C02F2101/105C02F2101/16
Inventor 胡强张学治杨琳
Owner GUOTOU BIO TECH INVESTMENT CO LTD