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Treatment method for ultrahigh-concentration sewage containing phosphorus

A treatment method and technology for sewage, which are applied in the fields of water/sewage multi-stage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. The effect of good treatment effect, low chemical cost and stable water quality

Inactive Publication Date: 2012-12-12
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of ultra-high concentration phosphorus-containing sewage in order to completely solve the complex problems of ultra-high concentration phosphite, sulfate, high daily treatment capacity, and recycling of phosphorus resources generated during the catalyst preparation process of the acrylamide unit. processing method,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In the first stage, the dosage of calcium chloride is 2.5g per 100ml of phosphorus-containing sewage, the temperature is raised to 30°C, the reaction time is 180min, the reaction pH=8, stirring 200 times per minute, and standing for 30min after the reaction , to separate the solid-liquid mixture. In this process, in order to reduce the degree of supersaturation and form large particle precipitation, the reaction is divided into three times within half an hour, which can shorten the free sedimentation time of the sediment, and the solid-liquid mixture is clearly separated, and the precipitated product calcium phosphite can be obtained. And the mixture of calcium sulfate, its precipitation mixture can be used as anti-rust and anti-corrosion coatings. At this stage, TP dropped from 2300ppm to 200ppm, and pH=7 after treatment.

[0020] Add hydrogen peroxide to the sewage separated after the first-stage treatment, the dosage is 3ml per 100ml phosphorus-containing sewage, he...

Embodiment 2

[0023] In the first stage, the dosage of calcium chloride is 2g per 100ml of phosphorus-containing sewage, the temperature is raised to 30°C, the reaction time is 160min, the reaction pH=6, stirring 200 times per minute, and standing for 30min after the reaction. Separate the solid-liquid mixture. In this process, in order to reduce the degree of supersaturation and form large particle precipitation, the reaction is divided into three times within half an hour, which can shorten the free sedimentation time of the sediment, and the solid-liquid mixture is clearly separated, and the precipitated product calcium phosphite can be obtained. And the mixture of calcium sulfate, its precipitation mixture can be used as anti-rust and anti-corrosion coatings. At this stage, TP dropped from 2300ppm to 200ppm, and pH=7 after treatment.

[0024] Add hydrogen peroxide to the sewage separated after the first stage treatment, the dosage is 2ml per 100ml phosphorus-containing sewage, heat up ...

Embodiment 3

[0027] In the first stage, the dosage of calcium chloride is 3g per 100ml of phosphorus-containing sewage, the temperature is raised to 30°C, the reaction time is 200min, the reaction pH=10, stirring 200 times per minute, and standing for 30min after the reaction. Separation of solid-liquid mixture In order to reduce supersaturation and form large particle precipitation in this process, the reaction is fed three times within half an hour. This can shorten the free sedimentation time of the precipitate, and the solid-liquid mixture is clearly separated, and precipitation can be obtained The product is a mixture of calcium phosphite and calcium sulfate, and its precipitated mixture can be used as an anti-rust and anti-corrosion coating. At this stage, TP dropped from 2300ppm to 200ppm, and pH=7 after treatment.

[0028] Add hydrogen peroxide to the sewage separated after the first stage treatment, the dosage is 4ml for every 100ml phosphorus-containing sewage, heat up to 80°C, t...

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Abstract

A method for treating ultra-high-concentration phosphorus-containing sewage belongs to the field of environmental chemical water pollution control. The method includes the following steps: discharging sewage into a water collection well; Discharge into the adjustment tank, and add sulfuric acid solution into the adjustment tank, when the pH value of the liquid in the adjustment tank reaches 8, stop adding sulfuric acid solution; discharge the adjusted sewage into the underground sedimentation tank, this step is divided into three treatments Stage: In the first stage, calcium chloride is added to the sedimentation tank; in the second stage, hydrogen peroxide is added to the sewage treated in the first stage; in the third stage, compound compound is added to the sewage treated in the second stage flocculant. The TP and COD of the sewage treated by this method can meet the discharge standards, and the precipitated products can be used as coatings and chemical fertilizers, which solves the problem of secondary pollution caused by the chemical sludge produced in the treatment of phosphorus-containing sewage in the past, and the water quality of the treatment Phosphorus resources are recycled while meeting the discharge standards.

Description

technical field [0001] The invention belongs to the field of environmental chemical water pollution control, and in particular relates to a treatment method for ultra-high-concentration phosphorus-containing sewage. Background technique [0002] At present, the methods for industrially treating phosphorus-containing wastewater mainly include biological methods, chemical methods, and adsorption methods. The biological method is suitable for treating organic wastewater with low phosphorus concentration, and often requires secondary phosphorus removal treatment, and the process is cumbersome; the chemical precipitation method is more effective for high-concentration phosphorus-containing wastewater, but it needs to pay close attention to the pH of the wastewater to achieve the optimum The operation process is difficult; the adsorption method is only suitable for the treatment of high-concentration and small-volume industrial wastewater, and the treatment effect for high-concent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/52C02F1/72
Inventor 陈颖张静伟梁宇宁王宝辉杨鹤
Owner NORTHEAST GASOLINEEUM UNIV
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