Method for removing haloacetic acids in the drinking water

A haloacetic acid and drinking water technology, applied in the field of water treatment, achieves the effects of high removal rate, short treatment time and simple process

Inactive Publication Date: 2009-08-26
新疆达源环境工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Iron shavings, that is, iron flakes processed from metal steel, are currently widely used in wastewater treatment, such as using iron-carbon reduction technology to treat high-concentration organic chemical wastewater, and iron-carbon micro-electrolysis-coagulation process to treat turmeric Wastewater, improved iron-carbon micro-electrolysis method to pretreat polyester wastewater, iron-carbon micro-electrolysis method to treat nitrification wastewater, etc., but the combination of iron shavings and manganese sand filter material to remove trichloroacetic acid in low-concentration haloacetic acid in drinking water is in the domestic market There are no applications and reports outside

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  • Method for removing haloacetic acids in the drinking water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The iron shavings used in the present invention reduce and remove haloacetic acid, and control Fe in the effluent 2+ The concentration method is as follows: (the sample is a 100 μg / L haloacetic acid solution prepared with tap water):

[0027] Step 1: Degrease the iron shavings formed in the process of 45# steel processing, first use cleaning solution to degrease, such as washing powder, soak for 10-30min, and then soak in 2-3wt% dilute sulfuric acid for 0.5-1.5h to remove rust. Wash and set aside;

[0028] The second step: use plexiglass column, the diameter of the glass column is 29mm, the height is 500mm, the bottom is equipped with a support layer of glass beads with a height of 30mm, the particle size of the glass beads is 3-5mm, and then filled with manganese sand and manganese sand The height is 50mm.

[0029] Step 3: Crush the pretreated iron shavings to a length of about 20-50mm, put them on the upper layer of manganese sand filter material, and fill them unti...

Embodiment 2

[0034] With reference to Example 1, the 50mm manganese sand loaded in the third step is replaced with manganese sand and granular activated carbon, and the manganese sand and granular activated carbon are filled with 25mm respectively, and other materials and steps are unchanged.

[0035] The total content of haloacetic acid in the effluent of Example 2 is less than 5 μg / L, the total iron is less than 0.3 mg / L, and the chroma is less than 15 degrees. While the haloacetic acid in the water is well removed, other conventional indicators basically meet the requirements of national drinking water. specification.

[0036] Using iron shavings to reduce and remove TCA in water, compared with the advanced oxidation process: the preparation of water contains 100 μg / L of TCA, respectively, using UV / H 2 o 2 , UV / H 2 o 2 / O 3 Compared with the reduction treatment of iron shavings and granular activated carbon adsorption unit, the test method of trichloroacetic acid is according to the...

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Abstract

A method for removing trichloroacetic acid from drinking water with iron shavings combined with manganese sand. In the method, the iron shavings formed in the iron and steel processing process are degreased with cleaning liquid, derusted with dilute sulfuric acid, washed and crushed, and used for reduction and removal of trichloroacetic acid in drinking water. Control the contact time between water containing trichloroacetic acid and iron shavings, until most of the trichloroacetic acid is removed, use manganese sand to filter or use manganese sand and granular activated carbon to control the iron content and chroma in the water. The method is simple in operation, low in cost and fast in speed, can effectively remove the concentration of trichloroacetic acid in drinking water, and at the same time, all indicators in the effluent water can meet the quality standards of domestic drinking water in my country.

Description

technical field [0001] The invention belongs to the field of water treatment, and relates to a drinking water treatment technology, in particular to a method for removing trichloroacetic acid, a carcinogenic substance in drinking water. Background technique [0002] Haloacetic acid is a kind of weakly acidic and refractory substance produced by the reaction of chlorine and organic matter. It is mainly produced in the pre-chlorination and disinfection process units in the tap water production process. Trichloroacetic acid is one of the disinfection by-products of haloacetic acids. The urban water supply quality standard (CJ / T 206—2005) promulgated by the Ministry of Construction in June 2005 stipulates that the maximum limit of the total amount of haloacetic acid in drinking water is 60 μg / L, which mainly refers to the difference between trichloroacetic acid and dichloroacetic acid. with. With the increasingly serious pollution of drinking water sources and the increase of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58C02F1/70
Inventor 伍海辉高乃云徐斌张巧丽
Owner 新疆达源环境工程有限公司
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