Restoring method of activated carbon for decomposing, processing and adsorbing organic substance in waste water through microwave irradiation

A technology of microwave irradiation and decomposition treatment, applied in the field of water treatment, can solve the problems of inability to achieve in-situ regeneration, long regeneration time, secondary air pollution, etc., and achieves fast heating speed, small space occupation, and regeneration efficiency. high effect

Inactive Publication Date: 2005-01-12
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Purpose and task of the present invention are to overcome existing hot regeneration method to exist: (1) gac loss is big in the regeneration process; (2) gac adsorption capacity obviously declines after regeneration; secondary pollution; (4) the time required for regeneration is long; (5) the deficiency of in-situ regeneration cannot be realized, and a kind of activated carbon that can realize in-situ o...

Method used

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  • Restoring method of activated carbon for decomposing, processing and adsorbing organic substance in waste water through microwave irradiation
  • Restoring method of activated carbon for decomposing, processing and adsorbing organic substance in waste water through microwave irradiation
  • Restoring method of activated carbon for decomposing, processing and adsorbing organic substance in waste water through microwave irradiation

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Embodiment 1

[0038] Using a microwave irradiation regeneration device to regenerate simulated high-concentration pentachlorophenol wastewater and activated carbon

[0039] Traditional pentachlorophenol treatment methods such as biological methods, chemical oxidation methods, and metal reduction methods have problems such as long processing time and low processing efficiency. Select commercially available chemically pure pentachlorophenol solid powder and add alkali to prepare simulated wastewater with a concentration of 2000mg / L. It is required that the effluent concentration after treatment should be lower than 200mg / L, and the adsorption capacity of activated carbon should be restored to more than 80% of its initial value. The microwave irradiation regeneration device in the invention is placed in the production process line, and the activated carbon adsorption / microwave irradiation regeneration test is carried out. The steps are:

[0040] The first step is to charge the material. The re...

Embodiment 2

[0046] Using two parallel microwave irradiation regeneration devices to treat the production wastewater of Dalian ×× Pesticide Factory

[0047] This is a ××× pesticide factory with an annual output of ×× million tons. The amount of pesticide synthesis wastewater is 10 tons per day, and the COD of wastewater is 4000-10000mg / L. In the past, it was treated by incineration, which caused high treatment costs and secondary pollution. Adopt two microwave irradiation regeneration devices [20] installed side by side in the present invention to carry out activated carbon adsorption / microwave irradiation regeneration test, the steps are as follows:

[0048] The first step is wastewater sampling and analysis. The wastewater retrieved from Dalian XX Pesticide Factory has no impurities in the water and is relatively transparent. The COD of wastewater is 6784mg / L;

[0049] The second step, charging, the activated carbon in the quartz reactor [10] of two sets of microwave irradiation regenera...

Embodiment 3

[0054] Ex situ regeneration of waste activated carbon after tertiary treatment in sewage treatment plant

[0055] Waste activated carbon obtained from a sewage treatment plant in Dalian after tertiary treatment is regenerated in situ by using the process of the present invention and a microwave irradiation regeneration device. The specific operation steps are as follows:

[0056] The first step, incoming material sampling analysis: the activated carbon is coal-based granular activated carbon, and its average particle size is 2mm. Dry the activated carbon first, and measure its iodine value and specific surface area, which are 334.18mg / g and 284.6m 2 / g;

[0057] The second step, charging: open the resonant cavity loam cake [24] of microwave irradiation regeneration device [20], be 15 centimetres, the quartz reactor [10] that height is 120 centimeters in inner diameter, load the waste activated carbon of drying 2.5 kg, the filling height of activated carbon is about 50 cm, t...

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Abstract

The characteristics are: adsorption of organic substances in waste water and regeneration of active carbon are all proceeded in a microwave irradiating regenerating unit, active carbon is granular, humidity is controlled in 35-55 percent, stuffing quantity is 1/3-4/5 of volume of reactor, microwave frequency is 2450 MHz or 915 MHz, power is 0.5-64 kw, temp. is increased to 800-1200 deg.C and kept 3-5 minutes, total irradiating time is 15 minutes. The microwave irradiating regenerating unit consists of magnetron, microwave cavity resonantor and reactor, in top of which water control valve and vapour exit are set on, and there is a blow head in the reactor and sample connection and water exit on bottom of the reactor, alkali solution absorbing tank connected to vapour exit and gas adsorption column.

Description

technical field [0001] The invention relates to an activated carbon regeneration method and a microwave irradiation regeneration device for decomposing and treating organic matter in adsorbed waste water by using microwave radiation, which are used for treating organic waste water, especially refractory organic waste water, and belong to the field of water treatment. Background technique [0002] Activated carbon is a non-toxic, odorless, excellent adsorbent with a well-developed pore structure and a large specific surface area. In the early 1960s, European and American countries began to use activated carbon adsorption to treat urban drinking water and industrial wastewater. At present, the activated carbon adsorption method has become an effective means for the advanced treatment of urban sewage and industrial wastewater and the purification of polluted water sources. Since the early 1970s, the use of granular activated carbon to treat industrial wastewater has developed ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/34C02F1/00C02F1/28
Inventor 金燮刘希涛陈硕赵雅芝
Owner DALIAN UNIV OF TECH
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