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Technology for producing sewage adsorbing stones by using sewage processing plant sludge

A sewage treatment plant, technology for producing sewage

Inactive Publication Date: 2013-06-19
彭尹华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing methods for treating sludge from urban sewage plants generally use deep burial or heavy oil for burning and incineration. Deep burial requires a large amount of land and a large number of excavators, bulldozers, and transport vehicles are used for construction, and the burial site must be far away from the urban area. Once the city develops It also needs to be processed again, and the cost is too high; although the burning and incineration of heavy oil eliminates the need for deep burial, the cost of fuel oil and pollution to the atmosphere, and the residue after combustion becomes industrial waste, are still major defects and problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Sewage treatment plant sludge production sewage adsorption stone process, the present invention uses diatomite and sewage treatment plant sludge with a water content of 60% according to diatomite 43%, sludge 55%, lime 2%, wherein: diatomite Composition, SiO 2 The content is 70%, AI 2 o 3 content of 8%, MgO content of 2.5%, K 2 O content is 1.0%, Fe 2 o 3 The content of CaO is 2%, the content of CaO is 3%, Na 2 The content of O should be 2%, and the diatomite is ground into powder with a fineness of 150 meshes. The diatomite, sewage treatment plant sludge and quicklime are fully stirred and evenly covered with a film. After 11 days of natural oxidation and fermentation , through extrusion and granulation, the nominal size is 3cm, the shape is crushed stone, and then fired in a stainless steel rotary kiln; the stainless steel rotary kiln is set to dehydration drying, high temperature firing, and cooling. The three-stage process is independent, The device with integr...

Embodiment 2

[0014] Sewage treatment plant sludge production sewage adsorption stone process, the present invention uses diatomite and sewage treatment plant sludge with a water content of 40% according to diatomite 35%, sludge 63%, quicklime 2%, wherein: diatomite Composition, SiO 2 The content is 60%, Al 2 o 3 content of 10%, MgO content of 1.2%, K 2 O content is 0.05%, Fe 2 o 3 The content of CaO is 4%, the content of CaO is 1%, Na 2 The content of O is 4%, and the diatomite is ground into a powder with a fineness of 120 meshes. The diatomite, sewage treatment plant sludge and quicklime are fully stirred and evenly covered with a film. After 13 days of natural oxidation and fermentation, the Granulate, make the nominal size is 4cm, the shape is crushed stone, and then fired in a stainless steel rotary kiln; the stainless steel rotary kiln is set as a three-stage process independent and structurally integrated device of dehydration drying, high temperature firing, and cooling In th...

Embodiment 3

[0016] Sewage treatment plant sludge production sewage adsorption stone process method, the present invention uses diatomite and sewage treatment plant sludge with a water content of 50% according to diatomite 39%, sludge 60%, quicklime 1%, wherein: diatomite Composition, SiO 2 The content is 56%, AI 2 o 3 content of 6%, MgO content of 0.6%, K 2 O content is 0.02%, Fe 2 o 3 The content of CaO is 0.2%, the content of CaO is 6%, the content of Na 2 The content of O is 1.2%, and the diatomite is ground into powder with a fineness of 80 meshes. After the diatomite, sewage treatment plant sludge and quicklime are fully stirred evenly, they are covered with a film, and naturally oxidized and fermented for 15 days. Extruded and granulated, made into a spherical shape with a nominal size of 5cm, and then fired in a stainless steel rotary kiln; the stainless steel rotary kiln is set as a device with three independent processes of dehydration drying, high temperature firing, and co...

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Abstract

The invention relates to a technology for producing sewage adsorbing stones by using sewage processing plant sludge. According to the invention, diatomite and sewage processing plant sludge with a water content lower than 70% are mixed according to a ratio that: diatomite takes 35-45%, the sludge takes 55-64%, and quicklime takes 1-2%. The technology provided by the invention is advantaged in simple production technology and low processing cost. A product obtained after processing can be fully utilized as a sewage absorbing substance. The technology for producing sewage adsorbing stones by using sewage treatment plant sludge is provided.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment process of urban sewage plant and its utilization method. Background technique [0002] Sludge from urban sewage plants refers to the solid, semi-solid and liquid wastes produced by sewage treatment, containing a large amount of organic matter, rich in nutrients such as nitrogen and phosphorus, heavy metals, pathogenic bacteria and pathogenic bacteria, etc. The World Water Environment Organization has The sludge is renamed as biosolids. If it is discharged and discarded without treatment, it will cause serious pollution to the environment. With the popularization of sewage treatment facilities, the improvement of treatment rate and the deepening of treatment degree, the amount of sludge produced is bound to increase greatly. How to properly dispose of sludge from sewage plants and effectively use it as a new resource to turn waste into treasure has become an important factor for urban se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00B01J20/20B01J20/30
Inventor 彭尹华
Owner 彭尹华
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