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Waste water treatment process and treatment appts.

A wastewater treatment and treatment device technology, which is applied in natural water treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of high cost of reactors

Inactive Publication Date: 2002-09-18
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this system requires a special catalyst packing layer, and the cost of the reactor is relatively large

Method used

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  • Waste water treatment process and treatment appts.
  • Waste water treatment process and treatment appts.
  • Waste water treatment process and treatment appts.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Prepare synthetic wastewater containing 10,000mg / L of ammonia nitrogen and 10,000mg / L of hydrogen peroxide, and use the wastewater figure 1 The waste liquid treatment device shown is used for treatment.

[0082] First, put the waste water into the waste water supply tank 1, raise the temperature of the waste liquid to 40° C. through the waste water heater 5 at a flow rate of 1 liter / hour by the pump 2, then add alkali, and introduce it from the upper part of the treatment tower 6. Regarding the addition of the above-mentioned alkali, the 25% by mass sodium hydroxide in the alkali storage tank 3 was introduced from the pipe 24 into the pipe 25 by the pump 4, and the above-mentioned waste water and the sodium hydroxide were mixed. Moreover, regarding the addition amount of alkali, the addition amount of the said 25 mass % sodium hydroxide was adjusted so that the concentration of the sodium hydroxide of the said mixed water may be 4,000 mg / L.

[0083] In the above-menti...

Embodiment 2

[0088] Prepare synthetic wastewater containing 5,000mg / L of ammonia nitrogen and 5,000mg / L of hydrogen peroxide, and use the wastewater figure 1 The waste liquid treatment device shown is used for treatment.

[0089] First, as in Example 1, the above-mentioned waste water is put into the waste water supply tank 1, and the waste liquid is raised to 80° C. through the waste water heater 5 at a flow rate of 1 liter / hour by the pump 2, and then alkali is added, and the waste liquid is discharged from the treatment tower. 6 upper supply. Regarding the addition of the above-mentioned alkali, the 25% by mass sodium hydroxide in the alkali storage tank 3 is introduced into the pipeline 25 by the pump 4, and then the above-mentioned waste water and the sodium hydroxide are mixed. Also, regarding the addition amount of alkali, different from Experimental Example 1, the addition amount of the above-mentioned 25% by mass sodium hydroxide was adjusted so that the concentration of sodium ...

Embodiment 3

[0095] Except not adding aqueous sodium hydroxide solution, others were processed as in the above-mentioned embodiment 1.

[0096] As a result, the hydrogen peroxide concentration in the treated water discharged from the pipeline 11 was 800 mg / L, the ammonia concentration (ammonia ion concentration in terms of nitrogen) was 45 mg / L, and the pH was 10.5.

[0097] Also, the ammonia concentration in the gas discharged from the pipeline 30 is 1 ppm (volume) or less, and the nitrogen oxide (NOx) concentration is 12 ppm (volume). Example 4

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Abstract

PURPOSE: A wastewater treatment method and a wastewater treatment apparatus are provided to efficiently treat wastewater containing hydrogen peroxide and ammonia using a treatment column. CONSTITUTION: In an apparatus for treating wastewater containing hydrogen peroxide and ammonia, the wastewater treatment apparatus is characterized in that the treatment apparatus comprises a treatment column (6) in which a packing material having hydrogen peroxide decomposition catalytic function is installed, on the upper part of which a wastewater supply member for supplying the wastewater is installed, and on the lower part of which a gas supply member for supplying a gas for diffusion and a discharge member for discharging treatment completed water are installed, wherein the treatment column decomposes hydrogen peroxide in wastewater contacted with the packing material, exhausts an ammonia contained gas and discharges the treatment completed water at the same time.

Description

technical field [0001] The present invention relates to a waste water treatment method and a treatment device, and more particularly, the present invention relates to a waste water treatment method and a treatment device for effectively treating waste water containing hydrogen peroxide and ammonia using one treatment tower. Background technique [0002] In semiconductor device manufacturing plants, wastewater containing ammonia (hundreds of ppm to tens of thousands of ppm) and hydrogen peroxide (hundreds of ppm to tens of thousands of ppm) is often discharged to clean semiconductor chips. In addition, various chemical factories and the like sometimes discharge waste water containing hydrogen peroxide and ammonia. On the other hand, ammonia is the cause of eutrophication in rivers, lakes, and oceans, and hydrogen peroxide increases COD (chemical oxygen demand), so it is necessary to decompose and remove these components. For this reason, the foll...

Claims

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Application Information

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IPC IPC(8): C02F1/70C02F1/58C02F9/02C02F9/04
CPCC02F1/04C02F1/586C02F1/70C02F2101/16C02F2101/34C02F2103/346
Inventor 池田光明岡村淳志佐野邦夫北浦正次松島薰吉野和德
Owner NIPPON SHOKUBAI CO LTD
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