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Making process of spherical porous coaly biological filtering material for processing waste water

A technology for biological filter material and wastewater treatment, applied in biological water/sewage treatment, water/sludge/sewage treatment, separation methods, etc., can solve the problems of high energy consumption, secondary pollution, no ceramsite quality indicators, etc. Achieve the effect of small bulk density, high specific surface area, and solving the problem of secondary pollution

Inactive Publication Date: 2004-11-24
SHANGHAI INST OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this patent are: the amount of pottery clay is 70-95%, the amount of combustible raw materials is 5-30%, and it needs to be sintered at a high temperature of 800-1100°C for 8-18 hours, so the energy consumption per unit product is high, and The published invention patent text has no quality indicators related to ceramsite itself
There is also the fact that the filter material replaced after use will become solid waste, forming new secondary pollution

Method used

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  • Making process of spherical porous coaly biological filtering material for processing waste water
  • Making process of spherical porous coaly biological filtering material for processing waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The proportioning of embodiment 1 is: pulverized coal 900g, lime 50g, polyvinyl formal 50g.

[0022] The operation method of embodiment 1:

[0023] 1. Add 900g of raw coal powder and 50g of lime powder into the mixing kettle and mix for 10 minutes. Then add 200g of water and mix for 10 minutes, then add 50g of polyvinyl formal and mix for 10 minutes. Artificial granulation.

[0024] 2. Put the pellets into a muffle furnace with a temperature of 100°C for 60 minutes to keep warm and dry, then raise the temperature to 450°C for sintering for 90 minutes.

[0025] 3. The sintered coal-based biological filter material is naturally cooled to room temperature after being discharged from the furnace.

[0026] The proportion of Example 1 is shown in Scheme 1 in Table 1, which is a scheme in which a composite of an inorganic solid and an organic liquid binder is used as a binder. The product quality after sintering is shown in Scheme 1 in Table 2. The difference between embo...

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Abstract

The present invention relates to the making process of spherical porous coaly biological filtering material for processing waste water. The making process with coal with poor adhesivity as main material includes adding small amount of inorganic-organic composite adhesive, crushing, pelletizing, drying and sintering. The spherical porous coaly biological filtering material is used specially for water treatment and has performance according with relevant environment protecting requirement. It has the main quality indexes of: specific surface area 20-100 sq m / g, average pore size 5-250 microns, apparent density 0.8-1.2 g / cu cm, bulk density 0.5-0.8 g / cu cm, porosity 30-60 % and ash content lower than 25 %. The product of the present invention may be produced with available production apparatus in cement mill, and the used product may be used as fuel, producing no secondary pollution.

Description

technical field [0001] The invention relates to a manufacturing method of a spherical coal microporous biological filter material for wastewater treatment, belonging to the technical field of wastewater treatment. Background technique [0002] China is a country with scarce water resources. The per capita water resources are only a quarter of the world's per capita water resources, and the distribution is extremely uneven—North China and Northwest China are seriously short of water. What is incompatible with this is that 35 billion cubic meters of waste water is discharged every year, and less than 10% of the urban sewage has undergone centralized treatment. Although most industrial wastewater has been treated, it has not yet reached the national discharge standard. How to solve water pollution has become a prominent problem. Biological Aerated Filter (BAF for short) sewage treatment technology is a new sewage treatment process first developed in the West in the early 1990...

Claims

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Application Information

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IPC IPC(8): B01D39/06C02F3/10
CPCY02W10/10
Inventor 金鸣林王健刘光春孟建良
Owner SHANGHAI INST OF TECH
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