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Method for treating industrial chromium-containing waste water by bacteria

An industrial and waste water technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of Fe and Cr sludge that cannot be further treated, secondary pollution, high energy consumption, etc., and achieve reduction Various hazards, simplified equipment, good treatment effect

Inactive Publication Date: 2010-03-24
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods all have some common problems such as easy to cause secondary pollution, high cost of treatment, large energy consumption, etc.
Especially the Fe and Cr sludge in the electrolytic reduction method cannot be further treated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Put the prepared 500mL 2×LB in a biochemical reactor, add 500mL of industrial chromium-containing wastewater with a chromium concentration of 10.24mg / L, and adjust the pH to 7.0-9.0, and stir evenly with a stirrer. Then, according to the inoculum amount of 1% (ie 10ml), the activated Pseudomonas pallidum was inserted into the mixture, stirred at room temperature, and the results are shown in Table 1. After the discharge of hexavalent chromium in the wastewater reaches the national first-class pollutant discharge standard, add activated carbon to the system with 10% activated carbon (ie 100g) dosage, stir at room temperature, and the results are shown in Table 2.

[0015] Table 1 The change of hexavalent chromium content in wastewater with time

[0016] time (hours)

0

6

24

48

Cr(VI) concentration (mg / L)

4.34

4.26

3.88

0

[0017] The change of total chromium in table 2 wastewater with time

[0018] ...

Embodiment 2

[0020] Place the prepared 500mL 2×LB in a biochemical reactor, add 500mL of industrial chromium-containing wastewater with a chromium concentration of 100mg / L, and adjust the pH to 7.0-9.0, and stir evenly with a stirrer. Then, according to the inoculum amount of 1% (ie 10 ml), the activated Pallidum pallidum was inserted into the mixture, stirred at room temperature, and the results are shown in Table 3. When the discharge of hexavalent chromium in the wastewater reaches the national first-class pollutant discharge standard, add activated carbon to the system with 20% activated carbon (ie 200g) dosage, and stir at room temperature. The results are shown in Table 4.

[0021] Table 3 Changes of hexavalent chromium content in wastewater with time

[0022] time (hours)

0

48

72

96

Cr(VI) concentration

(mg / L)

48.65

41.17

13.78

0

[0023] The change of total chromium in table 4 wastewater over ...

Embodiment 3

[0026] Place the prepared 500mL 2×LB in a biochemical reactor, add 500mL of industrial chromium-containing wastewater with a chromium concentration of 200mg / L, and adjust the pH to 7.0-9.0, and stir evenly with a stirrer. Then, according to the inoculum amount of 1% (ie 10 ml), the activated Pallidum pallidus was inserted into the mixture, stirred at room temperature, and the results are shown in Table 5. When the discharge of hexavalent chromium in the wastewater reaches the national first-class pollutant discharge standard, add activated carbon to the system with 20% activated carbon (ie 200g) dosage, and stir at room temperature. The results are shown in Table 6.

[0027] The change of hexavalent chromium content in table 5 wastewater with time

[0028] time (hours)

0

48

96

138

Cr(VI) concentration

(mg / L)

98.85

65.52

11.25

0.32

[0029] The change of total chromium in table 6 waste wat...

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PUM

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Abstract

The invention relates to a technology for treating industrial chromium-containing waste water by using microorganism and adsorbing agent in a combining way. Ochrobactrum sp. CTS-325 (with the collection number of CGMCC 1715) strain is inoculated into the mixed liquid of the industrial chromium-containing waste water and nutrient; then, after full reaction, adsorbing material is used for absorbingCr(III); and finally, desorption is carried out, and chromium can be recovered. The method has high treatment efficiency and no secondary pollution, leads the processes of reduction and adsorption tobe carried out at the room temperature, ensures the operation to be simpler and more convenient, and greatly reduces the running cost.

Description

technical field [0001] The invention relates to a treatment technology for industrial chromium-containing wastewater, in particular to a method for reducing hexavalent chromium in wastewater by using microorganisms and removing trivalent chromium in wastewater by using an adsorption material. Background technique [0002] With the rapid development of chromium salt industry, the comprehensive level of chromium slag treatment has been greatly improved. However, there are still a considerable number of chromium salt factories that directly discharge undetoxified three wastes containing chromium, causing environmental pollution and seriously threatening human health. Experiments have proved that some chromium compounds can be directly absorbed by the digestive tract, leading to a series of diseases. Chromium exists mainly in the form of Cr(VI) and Cr(III) in water. Because Cr(VI) is soluble in water, easy to migrate, highly toxic, mutagenic, carcinogenic, and teratogenic, cau...

Claims

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Application Information

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IPC IPC(8): C02F1/62C02F9/14C02F3/34C02F1/28C02F101/22
Inventor 林璋程扬健栗斌苏新华吴兆贤黄丰
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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