Sludge and tailing mixing method

A technology for tailings and sludge, applied in fertilizer mixtures, sewage/sludge fertilizers, botanical equipment and methods, etc., can solve problems such as landslide geological disasters, dust pollution, groundwater and surface water pollution, etc. Effect

Pending Publication Date: 2017-12-22
DALIAN GREEN PINES ECOLOGICAL WISDOM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The terminal sludge treated by the sewage treatment plant in the city is rich in organic matter, nitrogen, phosphorus, and potassium, which can improve the fertility of the soil. The particle size and pH value meet the requirements of the soil. However, because the heavy metal content exceeds the standard, it cannot be used alone as planting soil.
Tailings refer to the tailings left by metal or non-metall

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1

[0017] The sludge is mixed with gold tailings and commonly used planting soil. The mixing steps are as follows:

[0018] S1. Detect the sludge, and the heavy metal content in the obtained sludge is shown in Table 2:

[0019] heavy metal name

[0020] Table 2: Content of heavy metals in sludge (mg / kg)

[0021] The golden tail is detected, and the heavy metal content in the obtained golden tail is as shown in Table 3:

[0022] heavy metal name

[0023] Table 3: Heavy metal content of gold tailings (mg / kg)

[0024] S 2. Take 1kg of sludge, 0.5kg of gold tailings, and 4.5kg of commonly used planting soil (which can be regarded as 0 in heavy metal content).

[0025] S 3. Calculate the total heavy metal content, taking cadmium as an example: 2.7*1+0.9*0.5+0*4.5=3.15mg, the final total heavy metal content is shown in Table 4:

[0026] heavy metal name

[0027] Table 4: Total Heavy Metal Content (mg)

[0028] S 4. Divide the total ...

Example Embodiment

[0035] Example 2

[0036] The sludge is mixed with gold tailings and granite powder, and the mixing steps are as follows:

[0037] S 1. Detect the sludge, and the heavy metal content in the obtained sludge is shown in Table 2:

[0038] heavy metal name

[0039] Table 2: Content of heavy metals in sludge (mg / kg)

[0040] The golden tail is detected, and the heavy metal content in the obtained golden tail is as shown in Table 3:

[0041] heavy metal name

[0042] Table 3: Heavy metal content of gold tailings (mg / kg)

[0043] The granite is detected, and the heavy metal content in the obtained granite powder is shown in Table 7:

[0044] heavy metal name

[0045] Table 7: Content of heavy metals in granite powder (mg / kg)

[0046] S 2. Take 1kg of sludge, 0.5kg of gold tailings and 4.5kg of granite powder.

[0047] S 3. Calculate the total heavy metal content, taking cadmium as an example: 2.7*1+0.9*0.5+0.1*4.5=3.6mg, the final total heavy metal ...

Example Embodiment

[0057] Example 3

[0058] Sludge 1kg, gold tailings 0.5kg, iron tailings 5kg were mixed by a forced mixer, and the mixing steps were as in the previous example, and after calculation, the heavy metal content in the iron tailings was as shown in Table 11:

[0059] heavy metal name

[0060] Table 11: Iron tailings heavy metal content (mg / kg)

[0061] Through the calculation of steps S1-S4, the heavy metal content in the green planting soil is obtained as shown in Table 12:

[0062] heavy metal name

[0063] Table 12: Content of heavy metals in green planting soil (mg / kg)

[0064] S 5. after table 12 is compared with table 1, obtain heavy metal arsenic content exceeding standard, adjust the quality of iron tailings in step S2, adjust the quality of iron tailings to 5.5kg, and repeat steps S3, S4, obtain after calculating The content of heavy metals in green planting soil is shown in Table 13:

[0065] heavy metal name

[0066] Table 13: Heavy meta...

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Abstract

The invention provides a sludge and tailing mixing method. Urban terminal sludge treated by a sewage plant is mixed with the tailing; the heavy metal contents in the sludge, the tailing and the common use planting oil are respectively detected; Mkg of sludge, Nkg of tailing and Lkg of planting soil are taken; the total heavy metal content Y is obtained through calculation; the heavy metal content in the mixed greening planting soil is obtained through dividing the total heavy metal content Y by the total mass (M+N+L); the mass of the tailing and the common use planting soil is regulated according to the heavy metal content in the obtained greening planting soil, so that the heavy metal content in the obtained greening planting soil conforms to the soil environment quality standard (mg/kg) (GB15618-1995) grade 3 PH being greater than 6.5. The heavy metal content in the mixed planting soil is low; the fertility of the greening planting soil can be improved, so that the solid waste can be effectively utilized; waste is changed into valuable materials.

Description

technical field [0001] The invention relates to the field of greening planting soil, and in particular relates to a greening planting soil that meets soil environmental quality standards by mixing sludge containing heavy metals and tailings. Background technique [0002] The terminal sludge treated by the sewage treatment plant in the city is rich in organic matter, nitrogen, phosphorus and potassium, which can improve the fertility of the soil. The particle size and PH value meet the requirements of the soil, but because the heavy metal content exceeds the standard, it cannot be used as planting soil alone. . Tailings refer to the tailings left by metal or non-metallic ores after beneficiation. The particle size and PH value meet the requirements of soil. However, some tailings have heavy metal content exceeding the standard and accumulate for a long time, which is easy to cause geological disasters such as landslides and form dust. Pollution, the heavy metal content of so...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04A01G9/10C05G3/80
CPCA01G24/00C05D9/00C05G3/00C05G3/80C05F3/00C05F5/002C05F7/00C05F11/00C05F11/02
Inventor 沈向军
Owner DALIAN GREEN PINES ECOLOGICAL WISDOM TECH
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