System and method for purifying organic pollutants in lake sediment and lake water

A technology of organic pollutants and lakes, applied in the field of environmental engineering, can solve the problems of large-scale application and needs of bioelectrochemistry, and achieve the effects of simultaneous efficient degradation, promotion of degradation efficiency, and efficient removal

Active Publication Date: 2019-12-24
SOUTHEAST UNIV
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Problems solved by technology

[0003] Purpose of the invention: the present invention provides a system and method for simultaneously purifying refractory organic pollutants in lake sediment and lake water. The problem that electrochemistry cannot be applied on a large scale

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  • System and method for purifying organic pollutants in lake sediment and lake water

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Embodiment 1

[0027] A system for simultaneously purifying lake sediment and refractory organic pollutants in lake water to treat organic matter includes the following steps:

[0028] (1) Start-up of the electrochemical reactor of the system

[0029] Using the return sludge in the secondary sedimentation tank of the sludge sewage treatment plant, inoculate the sludge on the anode and BER part of the MFC part of the system according to the volume ratio of polluted soil and sludge at a ratio of 30:1, supplement nutrients once every 24 hours, and statically Set it aside for 7-10 days, and complete the initial start-up when the system's power generation current is greater than 0.2mA. The basic nutrient solution composition (1L solution) is as follows: 400mg glucose, 330mg NaCl, 134mg NH4Cl, 33mg NaH2PO4, 18mg Na2HPO4, 340mg NaHCO3, 15mg MgSO4 7H2O, 2mg ZnSO4 7H2O, 2.2mg MnSO4 H2O, 1mg FeSO4, 0.24mg CoCl2 · 6H2O, 15 mg CaCl2 and 1.17 mg (NH4)6Mo7O24 · 4H2O.

[0030] (2) The reactor simultaneou...

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Abstract

The invention discloses a system and method for purifying organic pollutants in lake sediment and lake water. The system is composed of a sediment microbial fuel cell (SMFC) unit and a biofilm electrode (BER) unit. According to the method, degradation-resistant organic pollutants in lake sediment and lake sediment are degraded and removed through the SMFC unit, and degradation-resistant organic pollutants in lake water are degraded and removed through the BER unit. According to the method, a large amount of humic acid existing in the lake bottom mud is fully utilized as a co-substrate to promote the degradation capacity of the SMFC anode on refractory organic pollutants in the bottom mud; meanwhile, electrons generated by the SMFC unit are utilized by BER, and the degradation effect of theBER unit on the refractory organic pollutants in the lake water body is enhanced. In the invention, the effective way is provided for relieving the current energy crisis and solving the environmentalproblem, so that the system and method have immeasurable application and development potentials.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a system and method for simultaneously purifying refractory organic pollutants in lake sediment and lake water. Background technique [0002] Biofilm Electrode (BER) is a water treatment method for electrochemically coupling microorganisms. The biofilm electrode method fixes microorganisms on the electrode to form a biofilm, and under the action of a small direct current, the pollutants are degraded under the dual effects of electrochemical and microorganisms. In 1992, R.B.Mellor first proposed the concept of "biofilm electrode" in the journal Nature. They immobilized denitrifying enzymes on the surface of the cathode to make a biofilm electrode. The electrode effectively provided the reducing capacity for the immobilized enzyme. Hydrogen atoms are generated and utilized by immobilized denitrase to complete denitrification. Over the next ten years, experts at home and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F101/30
CPCC02F3/005C02F2101/30C02F2103/007
Inventor 曹羡李先宁王辉张皓驰张婧然张翀
Owner SOUTHEAST UNIV
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