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An iron-sulfur nutrient slow-release ball for sludge heavy metal bioleaching

A bioleaching and heavy metal technology, applied in the field of environmental pollution control, can solve the problems of easy precipitation of sulfur powder, loss with water, and difficulty in control, etc., to achieve the effect of enriching the total amount of nutrients, improving growth status, and increasing contact opportunities

Active Publication Date: 2022-04-05
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the fact that sulfur powder is easy to precipitate and loses the chance of contact with Thiobacillus; FeSO 4 It is easy to lose with water, needs to be added repeatedly, and is not easy to control; the problem of little contact between free bacteria and nutrient matrix, provides an iron-sulfur nutrient slow-release ball for sludge heavy metal bioleaching

Method used

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  • An iron-sulfur nutrient slow-release ball for sludge heavy metal bioleaching
  • An iron-sulfur nutrient slow-release ball for sludge heavy metal bioleaching
  • An iron-sulfur nutrient slow-release ball for sludge heavy metal bioleaching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] An iron-sulfur nutrient slow-release ball used for heavy metal bioleaching of sludge in the present invention:

[0049] It consists of two parts: the inner part is a small particle ball loaded with iron-sulfur nutrition; the outer part is a plastic-fiber composite mesh large spherical shell; the inner small particle ball loaded with iron-sulfur nutrition is filled in the outer plastic-fiber composite mesh large spherical shell , together constitute iron-sulfur nutrient slow-release balls.

[0050] The small particle balls loaded with iron-sulfur nutrition are composed of two kinds of monomer particle balls uniformly mixed, which are respectively monomer-loaded Fe particle balls and monomer-loaded S particle balls; monomer-loaded Fe particle balls and monomer-loaded S particle balls The ratio of the number of small pellets loaded with iron-sulfur nutrition is 4:6; the dosage of small pellets loaded with iron-sulfur nutrients is 220 / m 3 ;The individual weight of small pe...

Embodiment 2

[0073] An iron-sulfur nutrient slow-release ball used for heavy metal bioleaching of sludge in the present invention:

[0074] It consists of two parts: the inner part is a small particle ball loaded with iron-sulfur nutrition; the outer part is a plastic-fiber composite mesh large spherical shell; the inner small particle ball loaded with iron-sulfur nutrition is filled in the outer plastic-fiber composite mesh large spherical shell , together constitute iron-sulfur nutrient slow-release balls.

[0075] Further, the small particle balls loaded with iron-sulfur nutrition are composed of two kinds of monomer particle balls, which are respectively monomer-loaded Fe particle balls and monomer-loaded S particle balls; monomer-loaded Fe particle balls and monomer-loaded The number ratio of S pellets is 4:6; the dosage of small pellets loaded with iron-sulfur nutrition is 260 / m 3 ;The individual weight of small pellets loaded with iron-sulfur nutrition is 20-26g;

[0076] The plas...

Embodiment 3

[0097] An iron-sulfur nutrient slow-release ball used for heavy metal bioleaching of sludge in the present invention:

[0098] It consists of two parts: the inner part is a small particle ball loaded with iron-sulfur nutrition; the outer part is a plastic-fiber composite mesh large spherical shell; the inner small particle ball loaded with iron-sulfur nutrition is filled in the outer plastic-fiber composite mesh large spherical shell , together constitute iron-sulfur nutrient slow-release balls.

[0099] Further, the small particle balls loaded with iron-sulfur nutrition are composed of two kinds of monomer particle balls, which are respectively monomer-loaded Fe particle balls and monomer-loaded S particle balls; monomer-loaded Fe particle balls and monomer-loaded The number ratio of S pellets is 4:6; the dosage of small pellets loaded with iron-sulfur nutrients is 240 / m 3 ;The individual weight of small pellets loaded with iron-sulfur nutrition is 20-26g;

[0100] The plas...

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Abstract

The invention belongs to the technical field of environmental pollution control, and in particular relates to an iron-sulfur nutrient slow-release ball used for sludge heavy metal bioleaching. An iron-sulfur nutrient slow-release ball used for heavy metal bioleaching of sludge in the present invention: it consists of two parts: the inner part is a small particle ball loaded with iron-sulfur nutrition; the outer part is a plastic-fiber composite mesh large spherical shell; the inner part The small particle balls loaded with iron-sulfur nutrition are filled in the outer plastic-fiber composite mesh large spherical shell, which together constitute the slow-release ball of iron-sulfur nutrition. The invention can be used for sludge heavy metal biological leaching, and can provide long-lasting and stable S and Fe nutrition for the sulfur bacilli on which sludge heavy metal treatment depends. On the one hand, the iron-sulfur nutrient slow-release ball can increase the contact chance of free T.f bacteria, free T.t bacteria and nutrient matrix; on the other hand, it can provide more attachment carriers for attached T.f bacteria and attached T.t bacteria. As a beneficial supplement to the sludge bioleaching mixed liquor reaction system.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and in particular relates to an iron-sulfur nutrient slow-release ball used for sludge heavy metal bioleaching. Background technique [0002] Heavy metal elements in municipal sewage plant sludge are stubborn pollutants, which limit the resource utilization of sludge. Bioleaching technology is one of the important methods to remove heavy metal pollution from sludge. Sludge bioleaching refers to the biochemical metabolic process of weak acidophilic bacteria Thiobacillus acidophilus, acidophilus Thiobacillus acidophilus and some heterotrophic bacteria in the presence of S and Fe nutrients to make heavy metals in sludge from sulfide, carbon Insoluble states such as acid salts and organic binding states are gradually transformed into easily soluble states such as exchange states, and finally heavy metals are dissolved from the solid phase and enter the liquid phase to achieve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/02C02F101/20
CPCC02F11/02C02F2101/20
Inventor 张弛薛军李超黄伟张海怡
Owner TAIYUAN UNIV OF TECH
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