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Composite passivator for reducing heavy metal content of pig manure organic fertilizer and application of composite passivator

A technology of heavy metal and passivation agent, applied in the direction of organic fertilizer, application, fertilizer mixture, etc., can solve the problems of heavy metal reduction, low passivation rate of heavy metal, etc., and achieve the effect of reducing bioavailability, significant reduction effect, and simple formula

Pending Publication Date: 2018-05-15
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology helps prevent harmful substances from entering crops that are used to feed animals such as horses or sheep while producing them's own milk products. It does this through combining certain chemical agents into special compositions called passive stabilizers (passives) before bacterial decomposition occurs on these plants. These active ingredients help protect against damage caused by excess amounts of metal elements like copper and lead-based pesticides commonly found around grazing lands where livestock consume their food sources). By adding specific types of chemistry together, it becomes possible to create effective treatments without affecting beneficial properties of other nutrients within those crops being fed therein.

Problems solved by technology

This patented describes how we have developed ways to make better management practice on animal husbandry waste materials (manufacturing) without causing harm or environmental concerns due to their high levels of contamination with various types of pesrower residue. Current methods involve burning them down into landfills after they reach maturity, but this method also leads to increased amounts of pollutants being released back onto surface waterways during rainwater runoff. To address this issue, researchers aim at developing effective measures against the production of certain polluted forms like copper and zinc while minimizing negative effects caused by traditional treatments involving nitrification/denitridization processes.

Method used

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  • Composite passivator for reducing heavy metal content of pig manure organic fertilizer and application of composite passivator
  • Composite passivator for reducing heavy metal content of pig manure organic fertilizer and application of composite passivator
  • Composite passivator for reducing heavy metal content of pig manure organic fertilizer and application of composite passivator

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preparation example Construction

[0033] Among the present invention, the preparation method of the peanut shell biochar of described thiourea modification, preferably comprises the following steps:

[0034] A, the peanut shells are dried, pulverized, and sieved to obtain peanut shell powder;

[0035] B. Anaerobically pyrolyzing the peanut shell powder obtained in step B at 550-600°C for 3-4 hours;

[0036] C. Grind and sieve the pyrolyzed peanut shell powder, add 1 to 2 mol / L thiourea solution to the obtained peanut shell powder, soak for 2 to 3 hours, and place it at 100 to 120°C for 1 to 2 hours of solidification ; The quality of the peanut shell fine powder and the volume ratio of thiourea solution 1mg: 5 ~ 8ml;

[0037] D. washing the solidified product with water to neutrality to obtain thiourea-modified peanut shell biochar.

[0038] In the invention, peanut shells are dried, crushed, and sieved to obtain peanut shell powder.

[0039] In the present invention, the drying temperature is preferably 60-...

Embodiment 1

[0061] 1) Preparation of thiourea-modified peanut shell biochar: Wash the peanut shells, dry them at 70°C, crush them, pass through a 20-mesh sieve, perform anaerobic pyrolysis at 550°C for 4 hours, and grind them through a 50-mesh sieve. According to the addition amount of solid-liquid ratio 1:5, add 2 mol / L thiourea solution, soak for 3 hours, put it in an electric furnace at 100 ℃ for 2 hours to cure. After the sample was cooled, it was washed repeatedly with distilled water until the filtrate was neutral, and after drying, the thiourea-modified peanut shell biochar was obtained.

[0062] 2) Preparation of heavy metal passivating bacteria agent: mix the collected bran and herbal dregs according to the mass ratio of 1:1 and use them as mixed auxiliary materials. The residue and the residue of Radix Paeoniae Alba are mixed uniformly according to the weight ratio of 3:4:2:3, and the obtained mixed auxiliary materials are dried, pulverized, passed through a 10-20 mesh sieve, an...

Embodiment 2

[0070] A compound passivator for reducing heavy metal content in pig manure composting, comprising the following components in parts by weight: 50kg of peanut shell biochar modified by thiourea, 50kg of heavy metal passivation agent, 20kg of crab shell powder, and biochemical yellow Humic acid 10kg, nano carbon black 5kg.

[0071] According to the compound passivator formula, carry out the preparation of the compound passivator of heavy metal content in the pig manure compost according to the following steps:

[0072] 1) Preparation of thiourea-modified peanut shell biochar: Wash the peanut shells, dry them at 70°C, crush them, pass through a 20-mesh sieve, perform anaerobic pyrolysis at 600°C for 3 hours, and grind them through a 50-mesh sieve. According to the addition amount of solid-liquid ratio 1:8, add 1 mol / L thiourea solution, soak for 2 hours, place in an electric furnace and cure at 120°C for 1 hour. After the sample was cooled, it was washed repeatedly with distill...

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Abstract

The invention provides a composite passivator for reducing the heavy metal content of a pig manure organic fertilizer and application of the composite passivator, and belongs to the field of organic fertilizers. The composite passivator for reducing the heavy metal content of the pig manure organic fertilizer comprises the following components by weight: 50-70 parts of thiourea modified peanut shell charcoal, 30-50 parts of a heavy metal passivating fungicide, 20-30 parts of crab shell powder, 10-20 parts of fulvic acid, and 3-5 parts of nanometer carbon black; every 100 mg of an auxiliary material of the heavy metal passivating fungicide contains 2.25*10<7> to 2.5*10<8> CFU of rhodotorula mucilaginosa strain OP11; and the preservation number of the rhodotorula mucilaginosa strain OP11 isCGMCC No.13540. The invention also discloses the application of the composite passivator to reducing the heavy metal content of the pig manure organic fertilizer.

Description

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Claims

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Application Information

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Owner QINGDAO AGRI UNIV
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