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A kind of preparation method of sewage catalytic reduction dehalogenation material

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: 2017-09-19
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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  • A kind of preparation method of sewage catalytic reduction dehalogenation material
  • A kind of preparation method of sewage catalytic reduction dehalogenation material
  • A kind of preparation method of sewage catalytic reduction dehalogenation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 Intermittent wastewater treatment:

[0049] The waste water was taken from the discharge outlet of a biological pretreatment facility of a paper-making enterprise. The water quality was: COD 84mg / L, BOD 5 It is 16mg / L, pH is 6.6, AOX is 20.4mg / L.

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

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

[0052] After the tre...

Embodiment 2

[0053] Example 2 Continuous wastewater treatment:

[0054] Place the previously prepared catalytic reduction dehalogenation material in 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, and the bottom of the filter reaction column is provided with a filter plate supporting layer 5, and the gap between the filter plate supporting layer 5 and the water inlet pipe 1 The tube body is filled with the aforementioned catalytic reduction dehalogenation material to form a packing area 4. A water outlet pipe 8 is provided on the wall of the filter reaction column tube below the filter plate supporting layer 5, and a flow meter 7 and a valve 6 are provided on the water outlet pipe 8 to control the flow of wastewater and the residence time of the wastewater refill zone 4.

[0055] The specification of the filtration reaction co...

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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, and particularly relates to a preparation method of a sewage catalytic reduction dehalogenation material. Background technique [0002] Absorbable Organic Halogens (AOX) is an international water quality indicator that characterizes organic halides, including chloride, bromide and iodide, but not fluoride. AOX is often carcinogenic and mutagenic, and it is highly harmful. [0003] The European Community stipulates that the concentration limit of AOX for class A water (referring to the preparation of high-quality drinking water by natural methods) is 50μg / L, and for class B water (satisfactory drinking water needs to be prepared by physical and chemical methods) is 100μg / 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 of AOX in the Federal Wastewater Law, and countries s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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