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Composite dieselguhr coagulation aid used for garbage percolation sewage treatment

A technology for the treatment of landfill leachate and sewage, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of secondary pollution of water body, poor treatment effect, complex pollution components, etc., achieve reduced operating costs, and widely used Value, the effect of short process flow

Inactive Publication Date: 2006-11-29
张家彪 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of using diatomite to treat landfill leachate sewage, due to the complex pollution components and high concentration of landfill leachate sewage, NH 2 The concentration of -N can be as high as 300-600mg / L, which is difficult to remove by conventional flocculation and precipitation methods
However, due to the high concentration of other pollutants, it is difficult to meet the discharge standards only by adding coagulants. Adding a large amount of coagulants will also cause secondary pollution of the water body, and the flocculation speed is slow and the suspension time is long. The effect is not good, so the addition of coagulant aid is introduced
Even so, in order to achieve the treatment effect of the emission standard, more diatomite coagulant must be used, which brings the disadvantages of large area, large equipment investment, high operating cost and complicated process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1, a kind of compound diatomite coagulant aid that is used for landfill leachate sewage treatment of the present invention, is that 85% by weight of diatomite and 15% by weight of factory alumina waste Pulverize and mix evenly, then dry and dehydrate, gradually increase the temperature from normal temperature until the temperature reaches 460°C, and finally the mixed powder obtained by cooling and sieving is grayish-white with light yellow powder, and the powder contains needle-like crystals r-Al 2 o 3 Molecular material, particle diameter ≤0.043mm.

[0012] The composite diatomite coagulant aid of the present invention is to add a certain proportion of r-Al in diatomite 2 o 3 Molecular materials, r-Al 2 o 3 It is acicular crystal, due to r-Al 2 o 3 It can be dissolved in acid or alkali and has the same large surface and porosity as diatomite. Therefore, this composite diatomite coagulant has dual functions of flocculation and coagulation in the treatm...

Embodiment 2

[0014] Embodiment 2, a kind of compound diatomite coagulant aid that is used for landfill leachate sewage treatment of the present invention is that the diatomite of 87% by weight is mixed with 13% by weight of factory alumina waste Carry out pulverization and uniform mixing, then heat and dry and dehydrate, gradually increase the temperature from normal temperature until the temperature reaches 480°C, and finally the mixed powder obtained by cooling and screening is grayish white with light yellow powder, and the powder contains needles. r-Al 2 o 3 Molecular material, particle diameter ≤0.043mm.

Embodiment 3

[0015] Embodiment three, a kind of composite diatomite coagulant aid for landfill leachate sewage treatment of the present invention, is that 92% by weight of diatomite and 8% by weight of factory alumina waste Grinding and mixing evenly, then heating, drying and dehydration, gradually increasing the temperature from room temperature until the temperature reaches 500°C, and finally the mixed powder obtained by cooling and screening is grayish white with light yellow powder, and the powder contains needles Crystalline r-Al 2 o 3 Molecular material, particle diameter ≤0.043mm.

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Abstract

A composite diatomite coagulant with both coagulating and flocculating actions for treating the osmotic garbage sewage is prepared from the diatomite containing alumina (10-30%) or the diatomite plus the alumina leftover or bauxite through pulverizing and heating to 450-550 deg.C for dewatering.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a composite diatomite coagulant aid for treating landfill leachate sewage. Background technique [0002] Diatomite (Diatemite) is a biogenic opal containing crystalline water amorphous silica, mainly composed of the remains of diatoms (a single-celled aquatic algae) and sedimentary deposits consolidated with ooze, with pores High density, large specific surface area, strong adsorption, light and strong, sound insulation, heat insulation, wear resistance, acid resistance and low thermal conductivity, etc., are widely used in water treatment, food, building materials, chemicals, rubber, petrochemicals, medicine, Metallurgy, paint, cosmetics, paint, machinery, energy and other industries. Diatomaceous earth is soft and light, with many micropores inside and a specific surface area of ​​20-70m2. 2 / g, therefore, it has good adsorption properties, especi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 张家彪林自强朱建华
Owner 张家彪
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