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Control method of bromate

A control method, bromate technology, applied in non-polluted water treatment, oxidized water/sewage treatment, etc., can solve problems such as uneconomical, high energy consumption of UV radiation, and large acid consumption

Inactive Publication Date: 2011-11-09
吕淼
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Problems solved by technology

However, there are problems in the application of the above methods in engineering practice: reducing the pH value will consume a large amount of acid, which is not economical; adding ammonia or iron needs to consider the follow-up treatment issues; catalytic ozone oxidation has catalyst stripping and Loss; UV radiation energy consumption is too high; and activated carbon adsorption principle should consider the biofilm on the surface of the carbon, etc.

Method used

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Embodiment Construction

[0004] The technical solution adopted in the patent of the present invention is: before the raw water is ozonated, a certain amount of H 2 o 2 , and mix it quickly by stirring, using O 3 / H 2 o 2 Advanced Oxidation System to control bromate formation during its formation. h 2 o 2 The amount of investment is based on O 3 To determine the dosage, generally make the H in the raw water 2 o 2 Concentration and O 3 The molar ratio of the concentrations was 1.5:1. Using this method, when the raw water [Br - ]=134ug / L, TOC=2.2mg / L, pH=8.1, 20 ℃ of temperature, O 3 When the dosage is 2mg / L, the amount of bromate produced is 13.846ug / L; adding 62.5uM H 2 o 2 Finally, the amount of bromate produced was 9.246ug / L, and the removal rate was 33.22%, meeting the water quality standard. When O 3 Dosage 2.5mg / L, H 2 o 2 When the dosage is 78.1uM, the removal rate of bromate is 37.80%. When O 3 Dosage 3mg / L, H 2 o 2 When the dosage is 93.8uM, the removal rate of bromate is 5...

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Abstract

A bromate controlling technology which can be applied in practical water treatment factories. Before ozonization, a certain amount of H2O2 is added in advance with stirring for rapidly and uniformly mixing so as to form an O3 / H2O2 advanced oxidation system, the amount of H2O2 is determined by the amount of O3 so as to let the mol ratio of H2O2 concentration and O3 concentration in original water be 1.5:1 at large. The method provided by the invention is convenient for addition, and is economical and beneficial without subsequent processing problems; in addition, the method can be utilized to control bromate and simultaneously raise the effect of removing organic matter during the water treatment process, and has a great application potential.

Description

technical field [0001] The present invention relates to bromate (BrO 3 - ), especially bromate control technology that can be applied to actual water treatment plants. Background technique [0002] Ozone (O 3 ) disinfection is increasingly used in drinking water treatment as an alternative to chlorine disinfection. But containing bromide ion (Br - ) The disinfection byproduct bromate formed in the water ozonation process has been designated as a 2B level potential carcinogen by the International Agency for Research on Cancer (the limit value of bromate in drinking water standards both at home and abroad is 10ug / L). At present, the control of bromate can be carried out from two aspects: controlling its formation and removing it after formation. The former mainly includes methods such as lowering the pH value, adding ammonia, and catalytic ozone oxidation. The latter mainly includes ultraviolet (UV) radiation, iron reduction, Activated carbon adsorption reduction and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F103/02
Inventor 吕淼
Owner 吕淼
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