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Method for efficiently treating high-density breeding environment wastewater

A high-density, waste water technology, applied in the direction of filtration treatment, water/sewage treatment, aerobic process treatment, etc., can solve problems affecting soil quality and plant growth, deterioration of breeding environment, large total amount, etc., to improve safety and reliability Applicability, expansion of application field, effect of reducing the concentration of antibiotics

Inactive Publication Date: 2020-02-07
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Livestock and poultry wastewater has the characteristics of high pollutant concentration, large amount, difficult collection, and great harm.
The main hazards are as follows: 1. Most livestock and poultry manure and waste water are directly discharged without treatment, polluting surface and groundwater; 2. Pour a large amount of manure and waste water into the soil, which directly leads to excessive nutrient content in the soil and affects soil quality and plant growth; 3. , The deterioration of the breeding environment will also cause harm to the health of livestock, poultry and livestock products as well as human beings

Method used

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  • Method for efficiently treating high-density breeding environment wastewater
  • Method for efficiently treating high-density breeding environment wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This embodiment provides a passivating agent, the passivating agent is modified zeolite supported nano-zero-valent iron, which is specifically prepared by the following method:

[0069] a) Preparation of modified zeolite: Add a sufficient amount of cetyltrimethylammonium bromide solution with a concentration of 24mmol / L to the natural zeolite, shake and react at 60°C and 80r / min for 20min, and filter out with Wash with absolute ethanol and deionized water for 4 times, dry, grind and pass through a 60-mesh sieve;

[0070] b) Add the modified zeolite to 58°C, 1mol / L NaOH solution according to the ratio of solid to liquid 1:18 (g / mL), stir at a low speed such as 60r / min for 15min, filter out and wash until neutral Dry at 60°C;

[0071] c) Prepare an ethanol-water solution with a volume ratio of 2:1, and add FeSO at a mass volume ratio of 1:50 (g / mL) 4 ·7H 2 O, add 6000-PEG according to the mass volume ratio of 1:1000 (g / mL), then add the modified zeolite obtained in ste...

Embodiment 2

[0074] This embodiment provides a method for efficiently treating high-density aquaculture environment wastewater, which specifically includes:

[0075] 1) Add the passivating agent described in Example 1 to the livestock and poultry wastewater in the breeding environment, and then conduct ionizing radiation treatment to obtain livestock and poultry manure water I;

[0076] 2) Livestock and poultry waste water I is subjected to micro-electrolysis / aerated biological fluidized bed reaction to obtain livestock and poultry waste water II;

[0077] 3) Add brine to livestock wastewater II, adjust the pH value of the system to 8-10, perform struvite crystallization treatment, and filter to obtain livestock wastewater III;

[0078] 4) Adjust the pH value of livestock and poultry wastewater III to 5-9, add hydrothermal carbon loaded with hydrated iron oxide to adsorb nitrogen and phosphorus, and discharge the treated liquid after the adsorption is completed;

[0079] Wherein, the pass...

experiment example 1

[0114] Experimental example 1: Ability to degrade antibiotics:

[0115] The method of high performance liquid chromatography / mass spectrometry is used to detect the concentration of antibiotics in the treated high-density aquaculture environment wastewater in each example of Example 2 and Comparative Examples D3 to D6, and compare the antibiotics in the high-density aquaculture environment wastewater before treatment Concentration to calculate its corresponding degradation rate, statistical results such as figure 2 shown. Depend on figure 2 It can be seen that the passivator of the present application is more significant in the removal and degradation of antibiotics such as tetracyclines, sulfonamides, quinolones and macrolides in the aquaculture environment wastewater, and can degrade and remove more than 90% (Example 2) of antibiotic residues.

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Abstract

The invention relates to the technical field of high-density breeding environment wastewater treatment, in particular to a method for efficiently treating high-density breeding environment wastewater.Specifically the method comprises the following steps: adding a passivator into breeding environment livestock and poultry wastewater, and then carrying out ionizing irradiation treatment to obtain livestock and poultry liquid dung I; carrying out a micro-electrolysis / aeration biological fluidized bed reaction on the livestock and poultry liquid dung I to obtain livestock and poultry wastewater II; adding bittern into the livestock and poultry wastewater II for struvite crystallization treatment, and performing filtering to obtain livestock and poultry wastewater III; and adding ferric oxidehydrate loaded hydrothermal carbon into the livestock and poultry wastewater III to adsorb and retreat nitrogen and phosphorus, and discharging the treated liquid after adsorption is completed, wherein the passivator is nano zero-valent iron loaded on modified zeolite. According to the method, relatively high-degree degradation and passivation of residual antibiotics and heavy metals in the high-density breeding environment wastewater are realized, COD and ammonia nitrogen can be efficiently degraded, 95% or more of nitrogen and phosphorus can be recycled, the safety and applicability of recycling of the high-density breeding environment wastewater are improved, and the application field of the high-density breeding environment wastewater is expanded.

Description

technical field [0001] The invention relates to the technical field of high-density aquaculture environment wastewater treatment, in particular to a method for efficiently treating high-density aquaculture environment wastewater. Background technique [0002] A large number of artificial feeding and accumulation of metabolites lead to deterioration of water quality, which is the main problem in the current industrialized recirculation farming model. Harmful substances such as ammonia nitrogen and nitrite nitrogen released by residual bait, excrement and organic debris after the action of water microorganisms can easily cause poisoning and even death of breeding animals, and the direct discharge of breeding wastewater can easily lead to eutrophication of the surrounding waters Therefore, controlling the form and concentration of nitrogen in the water body is a key link in the treatment of aquaculture wastewater. The composition of livestock and poultry wastewater is relative...

Claims

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Application Information

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IPC IPC(8): C02F9/14C01B25/45B01J20/30B01J20/20C10B53/02C02F103/20C02F101/20C02F101/22
CPCB01J20/20C01B25/451C02F1/001C02F1/283C02F1/30C02F1/46176C02F3/06C02F9/00C02F2101/20C02F2101/22C02F2103/20C02F2209/06C02F2209/08C10B53/02Y02E50/10
Inventor 汤江武孙宏李园成姚晓红沈琦王新吴逸飞
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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