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Compound filling for sewage treatment

A composite filler and sewage treatment technology, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc. Poor denitrification and dephosphorization effects and other problems, to achieve the effect of small bulk density, convenient management and low cost

Inactive Publication Date: 2005-11-23
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the single material and structure of various fillers, the effect on nitrogen and phosphorus removal is poor in practical applications, and it is difficult to meet the emission standards.
[0006] Among the existing sewage treatment fillers, the successful example of nitrogen removal is zeolite filler, which has high porosity, large specific surface area, and strong ion exchange capacity for ammonia nitrogen. However, zeolite filler has little effect on phosphorus removal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, the preparation of composite filler I for sewage treatment of the present invention

[0030] Raw materials: natural medical stone, ordinary quicklime, and ordinary powdered cement, the weight ratio of which is 6:9:2.

[0031] The medical stone is simply processed into granules, with an average particle size of about 0.5cm. Mix the quicklime with water in advance to make it fully saturated, and continue soaking for 3 days; then mix the medical stone, quicklime and cement, add a small amount of water and mix well, and then quickly granulate by hand (or mechanically). A coarse granular carrier is formed, which is the sewage treatment composite filler of the present invention. After testing, the average particle size is about 3cm and the particle weight is 30g.

Embodiment 2

[0032] Embodiment 2, the preparation of sewage treatment composite filler II of the present invention

[0033] Raw materials: natural medical stone, quicklime of ordinary type, powdered cement of ordinary type, furnace ash, the ratio of parts by weight is 6:9:2:1.

[0034] Treat the medical stone and furnace ash into particles with a particle size of about 0.2cm. Add water and mix the quicklime in advance to make it fully saturated, and then soak for 4 days; then mix the medical stone, furnace ash, quicklime and cement, add a small amount of After mixing with water and stirring evenly, granulate by manual or mechanical processing to form a rough granular carrier, which is the sewage treatment composite filler of the present invention. After testing, the average particle size is about 3cm and the particle weight is 35g.

Embodiment 3

[0035] Embodiment 3, the preparation of composite filler III for sewage treatment of the present invention

[0036] Raw materials: natural medical stone, common type of quicklime, common type of powdered cement, and paraffin wax, the ratio of parts by weight is 5:8:2:2.

[0037]The medical stone is simply processed into granules with an average particle size of about 0.5cm. The quicklime is added to water and mixed to make it fully saturated, then soaked continuously for 7 days, and the paraffin is heated to dissolve it into a liquid state; then the medical stone, paraffin, Quicklime and cement are mixed, a small amount of water is added and stirred evenly, and then quickly granulated by hand or machine to form a rough granular carrier, which is the composite filler for sewage treatment of the present invention. After testing, the average particle size is about 3cm and the particle weight is 35g.

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Abstract

The invention discloses a compound filling for sewage treatment which comprises the components (by weight portion) of medical stone 3-12, lump lime 2-18, industrial adhesives 1-3, or pore-forming agent 1-3. The invention also discloses the process for preparing the compounded mixture, which has the advantages of small volume weight, large high specific surface area, high degree of porosity, and impact load proofing.

Description

technical field [0001] The invention relates to a filler related to sewage treatment in the field of environmental protection, in particular to a composite filler for sewage treatment. Background technique [0002] my country is one of the 13 water-poor countries in the world, and its per capita water resources are only 1 / 4 of the world's per capita. The insufficiency of the total amount of water resources and the uneven spatial distribution have seriously restricted the rapid development of my country's economy. With the continuous development of urbanization, the situation of over-exploitation of water resources and neglect of protection has appeared in my country, which makes the environment of water resources worsen day by day. Every year, hundreds of millions of tons of sewage without any treatment or simple treatment but not up to the national discharge standards are discharged into rivers and lakes. In 2002 alone, the total discharge of sewage nationwide was as high...

Claims

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Application Information

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IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 李文奇胡朝华
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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