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Process for treatment of waste water containing boron

A treatment method and waste water technology, applied in the direction of oxidized water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of high operating costs

Inactive Publication Date: 2003-10-15
IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] The process needs to provide considerable heating energy, the operation cost is high, and the evaporation

Method used

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  • Process for treatment of waste water containing boron
  • Process for treatment of waste water containing boron
  • Process for treatment of waste water containing boron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This embodiment takes the boron content of flowing water (B in ) 1262mg / l power plant waste water is tested, utilizes the inventive method as shown in Figure 1 to add H 2 o 2 and Ca(OH) 2 The oxidation / flocculation mode of the flocculant was tested, and the pH value was controlled at about pH=10. The experimental results are shown in Table 1. H in the first oxidation / flocculation tank in Table 1 2 o 2 and Ca(OH) 2 Dosing amount is 5g / l and 14.2g / l respectively, to the removal rate of B (B rem ) up to 87.9%, compared with Comparative Example 1, confirms that the present invention adds H 2 o 2 The step of the method overcomes the bottleneck of the boron removal rate of the traditional flocculation method, so that the boron content of the treated water (B out ) down to 153mg / l.

[0056] Send the effluent water of the first oxidation / flocculation tank to a first solid / liquid separation tank and add anionic polymer flocculant (purchased from British Ciba (Allied Col...

Embodiment 3

[0061] In this example, the treated water of the oxidation / flocculation tank was used as the inflow water, and the test of ion exchange resin treatment B was carried out. The ion exchange resin was purchased from the Amberlite series of ion exchange resins from Rohm&Haas in the United States, code-named IRA-743. The boron content in the influent water of the resin was 12.7 mg / l, and the operating influent flow rate of the ion exchange resin was controlled at 10 resin volume / hour (BV / h), the hydraulic retention time is about 6 minutes, and the pH value is controlled at about pH=10-11. Experimental results such as Figure 4 as shown, Figure 4 It shows that when the volume of the influent water is below 200BV, the concentration of boron B in the effluent water is very low, almost undetectable. As the operating volume continues to increase, the boron B concentration in the treated water increases gradually, but it is still below the standard of B=1mg / l. When it reaches more tha...

Embodiment 4

[0063]In this embodiment, the waste water from a power plant with different influent boron content is used for testing, and the first oxidation / flocculation tank, the first solid / liquid separation tank, the second oxidation / flocculation tank, and the second solid / liquid After being treated in a separation tank, it is treated with an ion exchange resin similar to Example 3, and the treated effluent reaches below the boron discharge standard of 1 mg / l, as shown in Table 2 below.

[0064] waste water

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Abstract

The treating process of boron containing waste water includes oxidation / flocculation treatment via adding oxidant and flocculant in two sections to lower boron content greatly, and subsequent ion exchange resin or reverse osmose treatment to eliminate residual boron. The said process can treat high-concentration boron containing waste water, such as waste water from power plant, to reach the exhaust standard.

Description

technical field [0001] The present invention relates to an oxidation / flocculation technology for removing boron from boron-containing wastewater, and a treatment method for boron-containing wastewater using the oxidation / flocculation technology, especially a boron content ranging from hundreds to thousands of ppm or more The treatment method of boron-containing wastewater. Background technique [0002] With the increasing awareness of environmental protection, some items that were ignored in the past industrial wastewater control standards gradually surfaced, such as boron (B) items. Boron poisoning to crops is mainly caused by brown leaves, immature litter, and yield reduction, etc., and on the human body, it will interfere with protein synthesis and the nervous system. The current water pollution prevention and control law stipulates that the discharge standard of boron is 1mg / l, while the World Health Organization (WHO) recommended B<0.3mg / l in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02C02F1/42C02F1/44C02F1/52C02F1/72C02F9/02C02F9/04C02F9/08
Inventor 黄国豪黄耀辉陈致君彭淑惠
Owner IND TECH RES INST
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