Method for cooperatively treating arsenic-containing waste liquid by using sulfate reducing bacteria and lead-zinc smelting slag

A synergistic treatment, sulfate technology, applied in chemical instruments and methods, neutralized water/sewage treatment, water/sewage treatment, etc., can solve the problems of low efficiency and high cost, achieve low cost, save cost, and solve the release of heavy metals effect of the problem

Active Publication Date: 2021-12-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the prevention and control of lead-zinc smelting slag pollution, the commonly used physical guest soil method and chemical lime neutralization method are not only costly, but also have little effect

Method used

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  • Method for cooperatively treating arsenic-containing waste liquid by using sulfate reducing bacteria and lead-zinc smelting slag
  • Method for cooperatively treating arsenic-containing waste liquid by using sulfate reducing bacteria and lead-zinc smelting slag
  • Method for cooperatively treating arsenic-containing waste liquid by using sulfate reducing bacteria and lead-zinc smelting slag

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A method of synergistically treating arsenic-containing waste liquid with sulfate-reducing bacteria and lead-zinc smelting slag. A small-scale test was carried out in the laboratory. The lead-zinc smelting slag came from an open-air lead-zinc smelting slag yard in Guangxi Province. The composition is shown in Table 1 Shown, phase composition analysis see figure 1 As shown, No. 1 arsenic-containing waste liquid was selected from an antimony ore smelter in Guangxi Province, and its composition is shown in Table 2.

[0055] Table 1 Composition of lead-zinc smelting slag (wt.%)

[0056]

[0057] Table 2 Composition of No. 1 arsenic-containing waste liquid (mg / l)

[0058]

[0059] In this embodiment, the method for synergistically treating arsenic-containing waste liquid with sulfate-reducing bacteria and lead-zinc smelting slag includes the following steps:

[0060] (1) Take 10g of air-dried lead-zinc smelting slag and No. 1 arsenic-containing waste liquid accordin...

Embodiment 2

[0067] The lead-zinc smelting slag in this example comes from an open-air lead-zinc smelting slag stockyard in Guangxi Province, which is the same as in Example 1. The No. 2 arsenic-containing waste liquid comes from the drainage of a smelter near the stockyard. The contents of each component of the waste liquid are shown in Table 5. shown.

[0068] Table 5 Composition of No. 2 arsenic-containing waste liquid (mg / l)

[0069]

[0070] In this embodiment, the method for synergistically treating arsenic-containing waste liquid with sulfate-reducing bacteria and lead-zinc smelting slag includes the following steps:

[0071] (1) Mix 10g of air-dried lead-zinc smelting slag with No. 2 arsenic-containing waste liquid at a mass ratio of 1:10, react in an anaerobic bottle, set the shaking table speed at 180r / min, and the temperature at 30°C. After 12 hours of reaction, a small amount of supernatant was taken to detect the content of each element, as shown in Table 6.

[0072] Tabl...

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Abstract

The invention discloses a method for cooperatively treating arsenic-containing waste liquid by using sulfate reducing bacteria and lead-zinc smelting slag. The method comprises the following steps: (1) stirring and mixing the lead-zinc smelting slag and the arsenic-containing waste liquid in an anaerobic environment and conducting reacting to obtain to-be-treated waste liquid; and (2) adding sulfate reducing bacteria into the to-be-treated waste liquid obtained in the step (1), adding sodium lactate, and carrying out microbiological treatment, so as to synergistically treat the arsenic-containing waste liquid by the sulfate reducing bacteria and the lead-zinc smelting slag. According to the method for cooperatively treating the arsenic-containing waste liquid through the sulfate reducing bacteria and the lead-zinc smelting slag, the sulfate reducing bacteria and the lead-zinc smelting slag cooperate with each other, the removal rate of arsenic in the arsenic-containing waste liquid is jointly increased, and the removal rate of arsenic in the arsenic-containing waste liquid reaches 99.80% or above.

Description

technical field [0001] The invention belongs to the field of microbial environment restoration and treatment and water treatment, in particular to a method for utilizing sulfate-reducing bacteria (Sulfate-Reducing Bacteria) A method for co-processing arsenic-containing waste liquid with lead-zinc smelting slag. Background technique [0002] Arsenic is extremely toxic and has bioaccumulation and carcinogenicity. There are more than 20 countries (regions) suffering from arsenic poisoning in the world. China is one of the countries most seriously affected by arsenic poisoning. With the development of arsenic, arsenic is gradually being developed and utilized, but at the same time, a large amount of arsenic-containing waste liquid is produced in the process of processing, which will cause serious harm to the environment if it is not properly treated. Arsenic-containing waste liquid mainly comes from industrial drainage of ore mining, processing, pesticide manufacturing, petroch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/10C02F101/20
CPCC02F3/34C02F1/66C02F1/281C02F2101/103C02F2101/101C02F2101/20
Inventor 陈攀赵语馨章可朱建裕曹建
Owner CENT SOUTH UNIV
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