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Wastewater treatment system and method

A waste water treatment system and waste water technology, applied in textile industry waste water treatment, multi-stage water treatment, water/sewage treatment, etc., can solve problems such as poor resource utilization, achieve significant economic and environmental benefits, and improve treatment Efficiency, the effect of reducing the amount of sewage treatment

Pending Publication Date: 2020-02-07
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coagulation-sedimentation flocs produced by the coagulation-sedimentation method are generally treated as sludge waste after being dehydrated and compressed, and finally landfilled or incinerated, which cannot be well resourced under the current technical level use

Method used

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  • Wastewater treatment system and method
  • Wastewater treatment system and method
  • Wastewater treatment system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] At room temperature, the contents of antimony and COD in the influent water samples of printing and dyeing wastewater from waterworks were determined. The coagulation and sedimentation flocs in the third settling tank are directly returned to the influent adjustment tank at a reflux ratio of 3%, and the influent water is subjected to adsorption pretreatment. The treatment process adopted is as follows figure 1 shown. Among them, the rate ratio of flocs and printing and dyeing wastewater input into the water adjustment tank is set to 1:6, and the flocs are adsorbed for 120 minutes and then precipitated. The removal rate of COD reached 22.5%, and the removal rate of antimony reached 24.6%, indicating that the coagulation and sedimentation flocs were returned to the influent adjustment tank to pretreat the influent to a certain extent, but the degradation efficiency of antimony and COD limited.

Embodiment 2

[0050] At room temperature, the contents of antimony and COD in the influent water samples of printing and dyeing wastewater from waterworks were determined. The coagulation and sedimentation flocs in the third settling tank are returned to the pipeline of the water inlet tank at a reflux ratio of 3%. After the flocs pass through the primary separation device, they are directly returned to the water inlet adjustment tank to perform adsorption pretreatment on the water inlet. The primary separation device can be a magnetic floc separator. After the flocs and water are separated, the effluent flows into the triple sedimentation tank through the pipeline, and the flocs enter the inflow adjustment tank. Among them, the rate ratio of flocs and printing and dyeing wastewater input into the water adjustment tank is set to 1:6, and the flocs are adsorbed for 120 minutes and then precipitated, and then the water samples in the water tank are tested. The removal rates of antimony reach...

Embodiment 3

[0052] At room temperature, the contents of antimony and COD in the influent water samples of printing and dyeing wastewater from waterworks were determined. The coagulation and sedimentation flocs in the third settling tank are returned to the pipeline of the water inlet tank at a reflux ratio of 3%, and the flocs pass through the floc magnetization separator as the primary separation device and the floc air flotation separation device as the secondary separation device After that, it is directly returned to the influent adjustment tank, and the influent is subjected to adsorption pretreatment. After the flocs and water are separated, the effluent flows into the triple sedimentation tank through the pipeline, and the flocs enter the inflow adjustment tank. Among them, the rate ratio of flocs and printing and dyeing wastewater input into the water adjustment tank is set to 1:6, and the flocs are adsorbed for 120 minutes and then precipitated, and then the water samples in the ...

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Abstract

The invention discloses a wastewater treatment system and method. The wastewater treatment system comprises a coagulative precipitation tank, a coagulative precipitation floc backflow channel, a coagulative precipitation floc extracting pump, a floc-water separation device and a water inlet adjustment tank, the water inlet adjustment tank is connected to the front stage of the coagulative precipitation tank, wastewater passes through the water inlet adjustment tank and then enters the coagulative precipitation tank, the coagulative precipitation tank is connected with the water inlet adjustment tank through the coagulative precipitation floc backflow channel, the coagulative precipitation floc extracting pump and the floc-water separation device are arranged on the coagulative precipitation floc backflow channel, the coagulative precipitation floc extracting pump is used for extracting mixtures of coagulative precipitation flocs precipitated in the coagulative precipitation tank and water into the floc-water separation device, and the floc-water separation device is used for separating the coagulative precipitation flocs from water, and making the coagulative precipitation flocs toflow back to the water inlet adjustment tank. Wastewater is subjected to adsorption pretreatment through the coagulative precipitation flocs, thus the treatment efficiency of the coagulative precipitation flocs to the printing and dyeing wastewater is improved, and the content of antimony and COD in the water is effectively decreased.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a waste water treatment system and method. Background technique [0002] Printing and dyeing wastewater has the characteristics of refractory degradation and heavy metal residues, especially high antimony content and high COD, which pose serious harm to human health and the ecological environment. [0003] Antimony (Sb) is a heavy metal substance with a trace amount of high toxicity. Due to the bioaccumulation, ecological interference and carcinogenic properties of antimony, it has adverse effects on the blood, gastrointestinal and respiratory systems of the human body. It is considered by the US Environmental Protection Agency and the European Union. Pollutants should be controlled first, and since the problem of antimony pollution caused by the discharge of printing and dyeing wastewater has become increasingly prominent in recent years, its potential toxicity has also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F9/12C02F9/14C02F101/20C02F103/30
CPCC02F9/00C02F2103/30C02F2101/20C02F1/5281C02F1/28C02F1/24C02F1/48C02F2001/007C02F1/001C02F3/00C02F2301/08
Inventor 吴乾元李新正胡洪营吴涵婧杜鑫
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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