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Modified granular activated carbon coupling membrane bioreactor and heavy metal-containing wastewater treatment method

A granular activated carbon and bioreactor technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as difficult activated carbon adsorption technology, reduce sludge concentration, The effect of improving the treatment effect and improving the adaptability

Active Publication Date: 2017-12-08
DALIAN MARITIME UNIVERSITY
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  • Description
  • Claims
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Problems solved by technology

However, due to the limitation of adsorption capacity, the adsorption is generally only used for advanced treatment, and it is difficult to use activated carbon and other adsorption technologies in wastewater treatment.

Method used

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  • Modified granular activated carbon coupling membrane bioreactor and heavy metal-containing wastewater treatment method

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Experimental program
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Effect test

Embodiment 1

[0041] Reaction target solution volume: 160L

[0042] Activated sludge concentration in aerated activated sludge reaction tank: 3400mg / L;

[0043] Reaction target solution temperature: 25°C;

[0044] Respond to the initial concentration of pollutants in the target solution: COD Cr 400mg / L, Cd 2+ 2.5mg / L;

[0045] The initial pH value of the solution is 8.3;

[0046] The amount of modified granular activated carbon in the modified granular activated carbon component is 0-4g / L (where 0 means no modified granular activated carbon is added, and only biological treatment is used in the reactor);

[0047] The residence time of the aeration reaction tank is 4h;

[0048] The cadmium-containing wastewater was treated in batches. At different concentrations of modified granular activated carbon, the removal of cadmium-containing wastewater is shown in Table 1.

[0049] Table 1: Treatment effect of modified granular activated carbon coupled with membrane bioreactor for treating cad...

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Abstract

The invention discloses a modified granular activated carbon-coupled membrane bioreactor and a method for treating heavy metal-containing wastewater. The modified granular activated carbon-coupled membrane bioreactor of the invention includes an aerated activated sludge reaction tank and a membrane module. The aerated activated sludge reaction tank is provided with a water inlet and a discharge port, a sludge discharge pipe at the bottom, and an aeration pipe connected with an aeration pump at the bottom, and also includes a modified granular activated carbon component, and the modified granular activated carbon The component includes a filter screen supported by a hanging frame and modified granular activated carbon filled inside the filter screen. The modified granular activated carbon component is set in the aerated activated sludge reaction tank, and the membrane component is set in the aerated activated sludge Outside the reaction tank, the outlet is connected to the inlet of the membrane module through a water pump, and the membrane module is also connected to the aerated activated sludge reaction tank through a sludge return pipe. Compared with conventional membrane bioreactors, the invention can improve the treatment effect on waste water, has strong adaptability, and is simple and convenient to operate.

Description

technical field [0001] The invention relates to a heavy metal-containing wastewater treatment device and method, in particular to a modified granular activated carbon coupled membrane bioreactor and a heavy metal-containing wastewater treatment method. Background technique [0002] In recent decades, with the rapid development of human social economy and modern industry and the impact of human social activities, heavy metal pollution has become more and more serious, among which heavy metal pollution in water bodies is the most serious. Heavy metal pollution itself is difficult to control. Once heavy metal pollutants enter the surface water body and underground water system, such heavy metals and their compounds are highly stable and refractory, which will pose a great threat to the environment and human life. [0003] For example, cadmium is a typical heavy metal element that exists widely in the environment. Once metal cadmium enters the human body and causes metal poison...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 张锦
Owner DALIAN MARITIME UNIVERSITY
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