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Sewage treatment device and sewage treatment method with diatomite as flocculation core

A sewage treatment device and flocculation technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of fluctuation in the quality of recycled raw water, difficult degradation of organic pollutants, and unsatisfactory performance, and achieve high effluent quality and treatment. High efficiency and cost saving effect

Inactive Publication Date: 2007-12-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, heavy metal ions and residual organic pollutants in water are often difficult to degrade, which poses a potential threat to recycling
Furthermore, many urban sewage treatment plants have not reserved enough land for advanced treatment and the sewage system is not perfect, resulting in fluctuations in the quality of raw water for regeneration and reuse.
[0004] Although it is currently useful to add activated carbon; add complexes, strong oxidants, binary coagulants, and organic polymer coagulants to enhance coagulation technology to regenerate and reuse urban sewage secondary treatment effluent, but compared with the above-mentioned Difficulties exist, still not satisfactory

Method used

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  • Sewage treatment device and sewage treatment method with diatomite as flocculation core
  • Sewage treatment device and sewage treatment method with diatomite as flocculation core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add coagulant at the coagulant dosing port, then add water at the water inlet, and stir with the stirring paddle of the coagulation tank;

[0037] (2) inject the flocculation core body and the flocculant together from the flocculant dosing port into the gravity intensified tank, and accelerate the formation of flocs through the agitation of the gravity intensified tank and the stirring paddle in the mature tank;

[0038] The flocculation core body has a density of 1.1g / cm 3 diatomite; the total dosage of flocculation core body and flocculant is 15mg / L (relative to the sewage to be treated), and the ratio of flocculant to flocculation core body is 1 / 10; diatomite has a microporous structure and Huge specific surface area, the pore volume of diatomaceous earth is 1.0cm 3 / g, the specific surface area is 21m 2 / g, hole radius is 2000 ;

[0039] (3) In the inclined plate clarification tank, the flocculation core body adhering to a large amount of suspended matter i...

Embodiment 2

[0041] (1) Add coagulant at the coagulant dosing port, then add water at the water inlet, and stir with the stirring paddle of the coagulation tank;

[0042] (2) inject the flocculation core body and the flocculant together from the flocculant dosing port into the gravity intensified tank, and accelerate the formation of flocs through the agitation of the gravity intensified tank and the stirring paddle in the mature tank;

[0043]The flocculation core body has a density of 1.5g / cm 3 diatomite; the total dosage of flocculation core body and flocculant is 10mg / L (relative to the sewage to be treated), and the ratio of flocculant to flocculation core body is 1 / 15; diatomite has a microporous structure and Huge specific surface area, the pore volume of diatomaceous earth is 0.4cm 3 / g, the specific surface area is 19m 2 / g, the hole radius is 500 ;

[0044] (3) In the inclined plate clarification tank, the flocculation core body adhering to a large amount of suspended matter...

Embodiment 3

[0046] (1) Add coagulant at the coagulant dosing port, then add water at the water inlet, and stir with the stirring paddle of the coagulation tank;

[0047] (2) inject the flocculation core body and the flocculant together from the flocculant dosing port into the gravity intensified tank, and accelerate the formation of flocs through the agitation of the gravity intensified tank and the stirring paddle in the mature tank;

[0048] The flocculation core body has a density of 1.3g / cm 3 diatomite; the total dosage of flocculation core body and flocculant is 20mg / L (relative to the sewage to be treated), and the ratio of flocculant to flocculation core body is 1 / 5; diatomite has a microporous structure and Huge specific surface area, the pore volume of diatomaceous earth is 1.4cm 3 / g, the specific surface area is 25m 2 / g, hole radius is 8000 ;

[0049] (3) In the inclined plate clarification tank, the flocculation core body adhering to a large amount of suspended matter is...

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Abstract

The invention discloses a sewage treatment device, which comprises: an integrated main treatment device with a coagulating pond, a gravity reinforcement pond, a ripening pond and a tipping clear pond, wherein, connecting the clear pond bottom and pump and separator by pipes; a separator, and a sludge pump. The opposite treatment method comprises: using diatomite as the sped-up medium for clear pond to increase flocculating setting speed and improve water purification ability. This invention also has well denitrification effect, and fits to recovery for output water from urban sewage treatment plant and unstable domestic sewage.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a sewage treatment device and a sewage treatment method using diatomite as the flocculation core. Background technique [0002] my country is a country with a shortage of water resources, especially the problem of lack of fresh water resources is becoming more and more prominent. At the same time, every city has a large amount of urban sewage wasted in vain, which not only wastes resources, but also pollutes the environment. Therefore, the reuse of urban sewage effluent must become one of the main ways to solve this contradiction. [0003] Conventional coagulation-sedimentation-filtration-disinfection process is a process with reliable operation effect, mature technology and rich management experience in the domestic urban sewage secondary treatment effluent recycling process. However, the suspended solids in the effluent after the secondary treatment of urban sewage are compose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 吴纯德朱文明胡勇有
Owner SOUTH CHINA UNIV OF TECH
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