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Advanced oxidation reactor for activating PS (persulfate) based on MOFs (Metal organic Framework) and method for treating wastewater by using reactor

A reactor and reaction technology, which is applied in chemical instruments and methods, oxidized water/sewage treatment, special treatment targets, etc., can solve the problems that ferrous ions cannot be recycled, the particle size of MOFs materials is small, and the utilization rate of space resources is insufficient. , to achieve the effect of saving raw materials and energy, facilitating the distribution and pressure drop of water flow, and saving the amount of chemicals

Active Publication Date: 2018-03-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the prior art that the space resource utilization rate of the PS reactor activated by MOFs is insufficient, the volume utilization rate is low, the particle size of the MOFs material is small, it is easy to lose, the reactor is easy to short flow, and the hydraulic retention time is not enough. , the activation of ferrous ions produces a large amount of "iron slime", the color rises after treatment, and the ferrous ions cannot be recycled, resulting in resource consumption. A reactor based on MOFs activated PS is provided, specifically a three-layer filler Column PS Advanced Oxidation Reactor

Method used

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  • Advanced oxidation reactor for activating PS (persulfate) based on MOFs (Metal organic Framework) and method for treating wastewater by using reactor
  • Advanced oxidation reactor for activating PS (persulfate) based on MOFs (Metal organic Framework) and method for treating wastewater by using reactor
  • Advanced oxidation reactor for activating PS (persulfate) based on MOFs (Metal organic Framework) and method for treating wastewater by using reactor

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Embodiment 1

[0061] The method for treating waste water using a reactor based on MOFs activated PS, wherein, in the reactor based on MOFs activated PS, the sieve plate on the bottom surface of the MOFs material filling layer has a pore size of 2-3mm and a porosity of 80%. , the specific processing includes the following steps:

[0062] (1) Utilize OG (orange yellow G) to prepare printing and dyeing simulated wastewater, the OG simulated wastewater concentration is 0.2mM, and the preparation concentration is a sodium persulfate (PS) solution of 2mM, and the influent ratio is mixed according to the mass ratio PS:12OG=1.5:1 ( The flow of waste water and sodium persulfate solution is monitored by flowmeter), that is, the PS water inlet valve and the OG water inlet valve are controlled, and the flow rate is adjusted to ensure water inflow in proportion. The MOFs material filling volume is based on the ratio of the MOFs material filling layer cavity volume Add the prepared MOFs material (MIL-100...

Embodiment 2

[0070] The method for treating waste water using a reactor based on MOFs activated PS, wherein, in the reactor based on MOFs activated PS, the sieve plate on the bottom surface of the MOFs material filling layer has a pore size of 2-3mm and a porosity of 85%. , the specific processing includes the following steps:

[0071](1) The waste water from a paper mill in Dongguan after biochemical treatment was used for water leakage experiments. The initial COD concentration of the papermaking wastewater was 140mg / L, and after biochemical treatment, it still contained some refractory organic pollutants such as benzene rings. Sodium sulfate solution, according to the mass ratio PS: 12CODcr = 1:1, control the water flow and mix in proportion (the flow of waste water and sodium persulfate solution is monitored by flowmeter), and pump it into the three-stage packing column from bottom to top through the water inlet pump Type reactor, MOFs material filling amount is 2g / L according to the r...

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Abstract

The invention discloses a reactor for activating PS (persulfate) based on MOFs (Metal organic Framework) and a method for treating wastewater by using the reactor. The reactor for activating PS basedon MOFs is of a three-layer filling column structure and sequentially comprises a filtering layer, an MOFs material filling layer and a buffer layer from bottom to top, and the layers are connected ina mode of flanged connection. The reactor has a small height-diameter ratio, is full in space utilization and convenient to disassemble, and is capable of effectively fixing MOFs materials to performcatalysis and simultaneously ensuring that the wastewater is in full contact with the MOFs materials, the MOFs materials can be recycled, and a lot of raw materials and energy sources can be saved. The method for treating wastewater by using the reactor for activating PS based on MOFs realizes degradation of industrial wastewater generated by advanced oxidation treatment by activating PS based onMOFs; in treatment processes, ferrous ions are fully utilized, and less iron mud is generated; and after treatment, the chroma is obviously reduced, and the wastewater can be deeply treated so as toensure that the wastewater to be discharged is up to standards.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment devices and wastewater treatment, in particular to a reactor for activating PS based on MOFs and a method for treating wastewater. Background technique [0002] At present, industrial wastewater still contains refractory organic pollutants after only conventional biochemical treatment, such as dibutyl phthalate (DBP), a typical pollutant in papermaking wastewater, and benzene-ring organic pollutants in printing and dyeing wastewater, etc. Since such substances have carcinogenic, teratogenic, and mutagenic effects, direct discharge into water will greatly threaten the safety of the human body and the water environment. Therefore, advanced treatment of wastewater is still required on the basis of ensuring that the effluent meets the standards. Advanced Oxidation Processes (AOPs) can generate strong oxidative free radicals, which attack pollutant molecules through free radicals to break ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/30
CPCC02F1/725C02F2101/30C02F2201/002C02F2201/004C02F2209/08C02F2209/44C02F2301/046C02F2303/14
Inventor 万金泉万勇杰马邕文王艳闫志成罗婷
Owner SOUTH CHINA UNIV OF TECH
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