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Deodorant for treating biological sludge, preparation method and application of deodorant

A biological sludge and deodorant technology, applied in the fields of sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of difficulty in cultivation and preservation of bacterial strains, poor odor treatment effect and reliability and other problems, to achieve the effect of long effective action time, high selectivity and strong reliability

Inactive Publication Date: 2012-04-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of microorganisms to deodorize sludge has achieved certain results, there are still problems in the cultivation and storage of bacteria, and the effect and reliability of odor treatment are not strong.

Method used

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  • Deodorant for treating biological sludge, preparation method and application of deodorant
  • Deodorant for treating biological sludge, preparation method and application of deodorant
  • Deodorant for treating biological sludge, preparation method and application of deodorant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The basic properties of mechanically dehydrated biological sludge (1#) from a domestic sewage treatment plant are shown in Table 1:

[0036] Table 1

[0037] nature

moisture content

pH

organic matter

total sulfur

Zn

Pb

Cr

Cu

unit

％

％

%, dry basis

g / kg, dry basis

g / kg, dry basis

g / kg, dry basis

g / kg, dry basis

value

75.64

8.64

76.20

1.40

1.04

0.05

0.10

0.22

[0038] The preparation method of the sludge deodorizer comprises the following steps: mixing 95.0% by mass of ferric hydroxide, 4.8% by mass of disodium edetate and 0.2% by mass of citric acid, and Grind and pass through a 120-mesh sieve to prepare the sludge deodorant. Add deodorants of 0.05%, 0.10% and 0.25% to the dehydrated biological sludge by spraying, and stir evenly to deodorize. And the dehydrated biological sludge sample without adding sludge deodorizer was use...

Embodiment 2

[0044] Taken from a domestic sewage treatment plant mechanically dehydrated biological sludge (2#), the basic properties are shown in Table 2:

[0045] Table 2

[0046] nature

moisture content

pH

organic matter

total sulfur

Zn

Pb

Cr

Cu

unit

％

％

%, dry basis

g / kg, dry basis

g / kg, dry basis

g / kg, dry basis

g / kg, dry basis

value

81.19

6.70

45.67

1.23

1.00

0.04

0.10

0.17

[0047] The preparation method of the sludge deodorant comprises the following steps: mixing 90.0% by mass percentage of ferric hydroxide, 9.0% by mass percentage of disodium edetate and 1.0% by mass percentage of citric acid, and Grind and pass through a 120-mesh sieve to prepare the sludge deodorant. Add deodorants in the amount of 0.20% and 0.50% of the mass percentage of biological sludge to the dehydrated biological sludge in a spraying manner, and stir evenly to ...

Embodiment 3

[0050] The basic properties of the biological sludge in the concentration tank of a domestic sewage treatment plant are shown in Table 3:

[0051] table 3

[0052] nature

moisture content

pH

TSS

VSS

total sulfur

Zn

Cr

Cu

unit

％

g / l

g / l

%, dry basis

g / kg, dry basis

g / kg, dry basis

g / kg, dry basis

value

96.91

6.97

13.72

8.42

0.87

1.00

0.10

0.17

[0053] The preparation method of the sludge deodorant comprises the following steps: mixing 85.0% by mass percentage of ferric hydroxide, 13.0% by mass percentage of disodium edetate and 2.0% by mass percentage of citric acid, and Grind and pass through a 120-mesh sieve to prepare the sludge deodorant. In the biological sludge in the concentration pool, add the above-mentioned sludge deodorants with a mass ratio of 0.10% and 0.25% respectively in the form of spraying, and stir evenly to deo...

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Abstract

The invention belongs to the technical field of sludge treatment, and discloses a deodorant for treating biological sludge, a preparation method and application of the deodorant. The deodorant comprises the following components by mass percent: 85.0 to 95.0% of ferric hydroxide, 4.8 to 13.0% of ethylenediamine tetra-acetic acid and 0.2 to 2.0% of citric acid. The preparation method of the deodorant comprises the following steps: 85.0 to 95.0% by mass of ferric hydroxide, 4.8 to 13.0% by mass of ethylenediamine tetra-acetic acid and 0.2 to 2.0% by mass of citric acid are evenly mixed, ground and filtered by a 120-mesh sieve to obtain the deodorant for treating the biological sludge. The method for treating the biological sludge by using the deodorant comprises the following steps that: thedeodorant which accounts for 0.05 to 0.50% by mass of the biological sludge is added into the biological sludge, and the deodorant and the biological sludge are evenly stirred to remove unpleasant smells. The deodorant cost is low, the preparation method is simple, the operation for treating the biological sludge by using the deodorant is simple to operate, and the reliability is strong.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and relates to a deodorant for treating biological sludge, a preparation method and an application thereof. Background technique [0002] Sludge odor has always been an important problem that plagues the operation of sewage treatment plants, especially the treatment and disposal of sludge. Sludge will release a large amount of malodorous gas during the process of concentration, mechanical dehydration, transportation and storage, as well as composting and landfilling, which will not only cause damage to the health of the staff, but also easily cause dissatisfaction among the surrounding residents. The malodorous components of sludge can be divided into sulfur-containing compounds, nitrogen-containing compounds, lower fatty acids, terpenes, etc. according to the composition of elements. Among them, hydrogen sulfide, the odorous component, has the characteristics of extremely low odor thre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
Inventor 赵由才苏良湖曹先艳柴晓利
Owner TONGJI UNIV
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