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Preparation method of catalytic reduction dehalogenation material for sewage

A dehalogenation and sewage technology, applied in the field of water treatment, can solve the problems of low strength of nano-zero-valent iron materials, large consumption of zero-valent iron, easy loss of zero-valent iron, etc., and achieve efficient catalytic reduction dehalogenation reaction, utilization High rate, not easy to lose the effect

Active Publication Date: 2015-09-30
YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of the nanometer zero-valent iron material disclosed in this invention is not large. During use, the zero-valent iron that is reduced by the invention is easy to lose, and the iron that does not participate in the reduction reaction is not easy to recycle, and there is a large consumption of zero-valent iron. Problems such as low utilization rate

Method used

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  • Preparation method of catalytic reduction dehalogenation material for sewage
  • Preparation method of catalytic reduction dehalogenation material for sewage
  • Preparation method of catalytic reduction dehalogenation material for sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 intermittent waste water treatment:

[0049] The wastewater is taken from the discharge port of a biological pretreatment facility in a papermaking enterprise. The water quality is as follows: COD is 84mg / L, BOD 5 The pH is 16mg / L, the pH is 6.6, and the AOX is 20.4mg / L.

[0050] Take 500mL wastewater sample and place it in a beaker with a stirrer, add the prepared catalytic reduction dehalogenation material with a mass of about 150g, and make the wastewater and the catalytic reduction dehalogenation material fully contact and react under the action of the stirrer. Time to take water samples to measure changes in the concentration of COD and AOX. The result is as figure 2 .

[0051] At the end of the experiment, the wastewater COD in the beaker was 48mg / L, BOD 5 7mg / L, pH 6.8, AOX 6.4mg / L, up to the "Pulp and Paper Industry Water Pollutant Discharge Standard" (GB3544-2008), COD≤50mg / L, BOD5≤10mg / L, pH 6.0~ 9.0, AOX≤8mg / L emission requirements.

[005...

Embodiment 2

[0053] Embodiment 2 continuous wastewater treatment:

[0054] The catalytic reduction dehalogenation material prepared above is placed in such as image 3 The wastewater treatment reactor shown. The reactor includes a filter reaction column, the water inlet pipe 1 at the top of the filter reaction column is provided with a triangular water distribution weir 2, the filter plate support layer 5 is provided at the bottom of the filter reaction column, and the filter plate support layer 5 and the water inlet pipe 1 The body of the tube is filled with the catalytic reduction dehalogenation material prepared above to form a filling area 4 . An outlet pipe 8 is provided on the wall of the filter reaction column below the filter plate supporting layer 5, and a flow meter 7 and a valve 6 are arranged on the outlet pipe 8 to control the flow of waste water and the residence time of the waste water refilling area 4.

[0055] The size of the filtration reaction column is Φ100mm×1.5m, an...

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Abstract

The invention discloses a preparation method of a catalytic reduction dehalogenation material for sewage. The preparation method comprises the following steps: (1) mixing raw materials, and performing mould pressing to form a blank; (2) under an oxygen-free condition, sintering for forming the blank; and (3) breaking to obtain the catalytic reduction dehalogenation material. The preparation process of the catalytic reduction dehalogenation material is simple, the structural strength of the catalytic reduction dehalogenation material during sintering quenching process is greatly improved, the broken materials still have good structural strength after being broken, the phenomena of hardening and channeling can be effectively prevented, effective components in the catalytic reduction dehalogenation material can not lose easily, and are high in utilization ratio.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a method for preparing sewage catalytic reduction dehalogenation materials. Background technique [0002] Absorbable Organic Halogens (AOX) is an international water quality indicator that characterizes organic halides, including chlorides, bromides and iodides, excluding fluorides. AOX is often carcinogenic and mutagenic, and highly harmful. [0003] The European Community stipulates that the concentration limit of AOX for class A water bodies (referring to high-quality drinking water that can be prepared by natural methods) is 50 μg / L, and for class B water bodies (satisfactory drinking water needs to be prepared by physical and chemical methods) is 100 μg / L L. Among the 129 priority pollutants proposed by the US Environmental Protection Agency, organic halides account for about 60%. In 1987, Germany first stipulated the discharge limit value of AOX in the Federal Wastewater L...

Claims

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Application Information

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IPC IPC(8): B01J23/89C02F1/70C02F101/36
Inventor 范举红刘锐陈吕军
Owner YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG