Membrane concentrated water treatment method taking adsorption and ultrasonic regeneration as major technology

A technology of ultrasonic regeneration and treatment methods, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., to achieve the effect of improving biodegradability, simple equipment, and efficient operation

Active Publication Date: 2014-09-17
CHINA NAT OFFSHORE OIL CORP +2
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the membrane concentrated water contains high salinity and refractory organic matter which is difficult to be further treated, the present invention proposes a new solution: firstly, the separation of organic substances and salts in the membrane concentrated water is realized by using adsorption; The agent is regenerated by ultrasonic waves. The strong impact and high-speed jets generated by the ultrasonic process will promote the desorption of organic matter on the adsorbent. At the same time, the cavitation in the ultrasonic process will locally generate high temperature, high pressure and generate a large number of oxidative free radicals. It can promote the decomposition or degradation of organic matter, greatly improving the biodegradability of refractory organic matter; the ultrasonic regeneration solution can be further degraded through an aerobic membrane bioreactor

Method used

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  • Membrane concentrated water treatment method taking adsorption and ultrasonic regeneration as major technology
  • Membrane concentrated water treatment method taking adsorption and ultrasonic regeneration as major technology

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Experimental program
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Effect test

Embodiment 1

[0024] Concentrated water from a petrochemical wastewater membrane process was taken as the membrane concentrated water used in the experiment, and its water quality indicators were: COD 150 mg / L, conductance 4 ms / cm, Cl - 1000mg / L.

[0025] Using the treatment method of the present invention to treat the concrete steps of the above-mentioned experimental membrane concentrated water is as follows: first, the membrane concentrated water is passed into a single-stage adsorption column equipped with granular activated carbon (structure such as Figure 1-2 As shown), the way of water inlet and outlet is bottom inlet and top outlet, that is, the adsorption water inlet 4 enters from the bottom and fully contacts with the adsorbent, and then the water is discharged from the upper adsorption outlet 1. The hydraulic retention time is adjusted to 10 minutes, and the COD of the outlet water is measured every other column. ; The adsorption column is also provided with a stirrer 3 and an ...

Embodiment 2

[0028] Concentrated water from a certain pharmaceutical wastewater treated by membrane process was used as membrane concentrated water for experimentation, and its water quality indicators were: COD 338 mg / L, conductance 30 ms / cm, Cl - 8000mg / L.

[0029] The specific steps of using the treatment method of the present invention to treat the above-mentioned membrane concentrated water used in the experiment are as follows: first, the membrane concentrated water is passed into a single-stage adsorption column equipped with NDA-800 resin, and the way of entering and leaving the water is from the bottom to the top, and the hydraulic retention time is adjusted. For 30 min, measure the COD of every other column in the effluent; when the adsorption is saturated, stop the adsorption, start the agitator 3 and the ultrasonic transmitter 2, and realize the regeneration of the water in the column and the adsorbent 5 in a mixed state, and the ultrasonic frequency is controlled at 350 KH Z...

Embodiment 3

[0032] Concentrated water from a certain chemical wastewater treated by membrane was taken as the experimental wastewater, and its water quality indicators were: COD 500 mg / L, conductance 16.5 ms / cm, Cl - 4040 mg / L.

[0033] The specific steps of using the treatment method of the present invention to treat the above-mentioned wastewater are as follows: firstly, the membrane concentrated water is passed into a single-stage granular activated carbon adsorption column, the way of entering and exiting the water is from the bottom to the top, and the hydraulic retention time is adjusted to be 60 min. One column measures COD; when the adsorption is saturated, stop the adsorption, start the stirrer 3 and the ultrasonic transmitter 2, and realize the regeneration of the water and the adsorbent 5 in the column in a state of mixing, and the ultrasonic frequency is controlled at 750 KH Z , the ultrasonic time is controlled at 5 min, and the ultrasonic sound intensity is controlled at 10...

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Abstract

The invention discloses a membrane concentrated water treatment method taking adsorption and ultrasonic regeneration as a major technology. The method adopts a combined treatment technology of adsorption, ultrasonic regeneration and membrane bioreactor, and solves the problem that the membrane concentrated water contains high salinity and refractory organics. By adopting the method disclosed by the invention to treat the membrane concentrated water containing high salinity and refractory organics, the COD (Chemical Oxygen Demand) of the adsorption yielding water is less than or equal to 60mg / L, and the yielding water after the biological reaction of regenerated liquid can reach the primary state standard of Integrated Emission Standard for Pollutants. According to the treatment method, the adsorption and ultrasonic regeneration are integrated, so that the operation flow can be greatly simplified, and efficient operation is realized.

Description

technical field [0001] The invention relates to the field of organic wastewater treatment, in particular to a method for treating membrane concentrated water produced in the advanced treatment of wastewater. Background technique [0002] With the rapid development of the economy, the country's management of environmental pollution has become more and more stringent, and some corresponding local standards have been issued in various places to further strengthen the control of water quality. It is difficult to meet the water quality discharge standards stipulated by the state if the waste water only relies on the secondary treatment process, and advanced treatment must be carried out. In addition, with the further shortage of water resources in the country, a large amount of water needs to be consumed in the process of industrial production. As a result, advanced sewage treatment and reuse technology has been extensively researched and practically applied. [0003] Filtratio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/28C02F1/36
Inventor 雷太平顾锡慧官赟赟滕厚开陈军张艳芳李立峰王昊
Owner CHINA NAT OFFSHORE OIL CORP
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