Method for degrading antibiotics and heavy metals in excrement of livestock

A technology of livestock and poultry manure and antibiotics, applied in organic fertilizers, climate change adaptation, fertilization devices, etc., can solve the problems of inability to separate heavy metals, environmental temperature effects, long treatment periods, etc., and achieve fast and efficient ozone action and high treatment efficiency. , does not produce the effect of secondary pollution

Active Publication Date: 2019-03-08
山西龙盘微生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, composting has disadvantages such as long processing period, large floor area, influence by ambient temperature, incomplete passivation, and inability to completely separate heavy metals.

Method used

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  • Method for degrading antibiotics and heavy metals in excrement of livestock

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for degrading antibiotics and heavy metals in livestock and poultry manure, comprising the following steps:

[0032] a) Mix and stir 100g of collected cow dung and ozone water with a concentration of 10ppm for 30min at a ratio of 1:1 to obtain mixture A.

[0033] b) Mixture A was inoculated with Rhodopseudomonas palustris for anaerobic fermentation to obtain fermentation product B. The anaerobic fermentation conditions were light of 2000 lux, fermentation temperature of 40°C, pH value of 7, inoculum amount of 20g / L, and bacterial age It is the growth index phase, and the fermentation time is 90min.

[0034] c) Add 50mg / L polyaluminium chloride to the fermentation product B, and obtain the fermentation broth C after filtration. Promote the flocculation of photosynthetic bacteria that have adsorbed heavy metal ions, and completely remove heavy metal elements from the fermentation broth.

[0035] d) Fermentation broth C was inoculated with Rhodobacter sphaericus...

Embodiment 2

[0037] A method for degrading antibiotics and heavy metals in livestock and poultry manure, comprising the following steps:

[0038] a) Mix 200g of collected chicken manure with ozone water at a concentration of 20ppm and stir for 120min at a material-to-liquid ratio of 1:5 to obtain mixture A.

[0039] b) Mixture A was inoculated with 50% Rhodopseudomonas palustris, 20% Rhodobacter sphaericus and 30% Rhodobacter capsularis in mixture A for anaerobic fermentation to obtain fermentation product B. The anaerobic fermentation conditions were light 5000lux, fermentation temperature The temperature is 30°C, the pH value is 6, the inoculum amount is 30g / L, the bacterial age is in the growth exponential phase, and the fermentation time is 30min.

[0040] c) Add 90 mg / L polyaluminum chloride to the fermentation product B, and obtain fermentation broth C after filtration. Promote the flocculation of photosynthetic bacteria that have adsorbed heavy metal ions, and completely remove hea...

Embodiment 3

[0043] A method for degrading antibiotics and heavy metals in livestock and poultry manure, comprising the following steps:

[0044] a) Mix and stir 200g of collected pig manure and ozone water with a concentration of 0.5ppm for 90min at a ratio of 1:10 to obtain mixture A.

[0045] b) Mixture A was inoculated with 80% by weight of Rhodopseudomonas palustris and 20% of Rhodobacter capsulata for anaerobic fermentation to obtain fermentation product B. The anaerobic fermentation conditions were light of 4000 lux, fermentation temperature of 40°C, and pH of 8. The inoculation amount is 0.5g / L, the age of the bacteria is in the exponential growth period, and the fermentation time is 90min.

[0046]c) Add 80 mg / L polyacrylamide to fermentation product B, and obtain fermentation broth C after filtration. Promote the flocculation of photosynthetic bacteria that have adsorbed heavy metal ions, and completely remove heavy metal elements from the fermentation broth.

[0047] d) Fermen...

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Abstract

The invention relates to a method for degrading antibiotics and heavy metals in excrement of livestock, and relates to the technical field of fermentation treatment of excrement of livestock. According to the technical scheme, the method comprises the following steps that firstly, the excrement of the livestock is pretreated by using ozone water, then the heavy metals in the excrement are removedthrough secondary fermentation, in the secondary fermentation, photosynthetic bacteria are firstly inoculated for anaerobic fermentation, after fermentation is finished, a flocculating agent is added,and after filtering is carried out, the photosynthetic bacteria are inoculated to fermentation liquor for aerobic fermentation so as to obtain a final fermentation product. According yo the method, by means of a step-by-step fermentation mode, the toxicity damage of copper and zinc ions to the photosynthetic bacteria is avoided, the efficiency of the photosynthetic bacteria is improved, the fermentation period is shortened, pollutants such as the antibiotics, copper, zinc, cadmium, chromium and lead are simultaneously degraded within a fermentation period, and the treatment efficiency is high; the treatment process is odorless, and secondary pollution to the environment is avoided; and a treated bacterial solution can serve as a raw material of an organic fertilizer.

Description

technical field [0001] The invention relates to the technical field of livestock and poultry manure fermentation treatment, in particular to a method for degrading antibiotics and heavy metals in livestock and poultry manure. Background technique [0002] In order to achieve the purpose of preventing animal diseases and promoting animal growth, antibiotics are added to many livestock and poultry feeds. At the same time, the addition of some feed materials will also bring some heavy metals, which lead to high concentrations of antibiotics and poultry in livestock and poultry manure. Heavy metal residues, with the development of my country's large-scale breeding industry, the production of livestock and poultry manure has increased sharply, and it is widely used in organic fertilizers to return to the field, resulting in a large amount of antibiotics and heavy metals being discharged into the environment, polluting soil and water quality, and entering the human body through the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F3/00
CPCC05F3/00Y02A40/20
Inventor 张治家李保珍林晓峰白建勤齐良泉刘莉娟樊金华
Owner 山西龙盘微生物科技有限公司
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