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Single-chamber microbial electro-Fenton system and application thereof

A microbial electricity, Fenton technology, applied in biological water/sewage treatment, electrochemical biological combined treatment, water pollutants and other directions, can solve the problems of power consumption, narrow pH application range, fast catalyst consumption, etc., to reduce internal resistance , the structure is simple, the effect of high current density

Active Publication Date: 2021-03-26
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heterogeneous electro-Fenton technology (EF) can generate hydrogen peroxide in situ at the cathode, and then be catalyzed to produce highly oxidative hydroxyl radicals to degrade organic pollutants in sewage, avoiding the overheating of homogeneous Fenton technology. The disadvantages of hydrogen oxide transportation and storage are dangerous, the pH application range is narrow, and the catalyst is consumed quickly, but at the same time, the EF reaction system needs to consume additional electrical energy

Method used

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  • Single-chamber microbial electro-Fenton system and application thereof
  • Single-chamber microbial electro-Fenton system and application thereof
  • Single-chamber microbial electro-Fenton system and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1: the preparation of single-chamber microbial electric Fenton system

[0065] (1) Prepare the anode:

[0066] a. Preparation of anode base material: set the surface density to 125g / m 2 , a carbon cloth with a thickness of 360μm and a size of 4cm×3cm is rolled into a cylindrical shape after being treated at a high temperature in a muffle furnace at 430°C for 30 minutes; the thickness of the carbon cloth layers is 0.1mm, and the size is 1mm× A 3mm plastic mesh is used as a separator to ensure the attachment and growth of mixed bacteria between the carbon cloth layers. The rolled carbon cloth was soaked in acetone for 24 hours to remove the oily substance to obtain the anode substrate.

[0067] b. Cultivation of mixed bacteria: with the inoculum size of 4:1:1:3, the OD 600 =0.8-1.0 of Rhodopseudomonas palustris, Proteus vulgaris, Bacillus toyonensis and Pacific phalanophore were inoculated in a sterile test tube filled with culture solution to obtain a bacte...

Embodiment 2

[0079] Embodiment 2: the method for single-chamber microbial electric Fenton system processing ship bilge water

[0080] (1) Acclimatization of mixed bacteria: Add sodium acetate to the single-chamber microbial electro-Fenton system to a final concentration of 10 mM. Adjust the resistance value of the variable resistor to 1000Ω, close the circuit to start the microbial electro-Fenton system, and when the system can still output a stable current after more than 3 cycles, the domestication of the mixed bacteria is completed.

[0081] (2) Treatment of bilge water: When the output voltage of the anode mixed bacteria is greater than 20mV, adjust the variable resistor to 10Ω, and then add bilge water twice the volume of the culture solution to the single-chamber microbial electro-Fenton system, Carry out degradation and purification treatment of bilge water.

Embodiment 3

[0082] Embodiment 3: Application of single-chamber microbial electric Fenton system in ship bilge water treatment

[0083] Figure 5 It is a schematic flow chart of the treatment of bilge water by the single-chamber microbial electro-Fenton system of the present invention. Such as Figure 5 As shown, the bilge water is preliminarily treated by sedimentation in the sedimentation tank, and the sludge and impurity particles are filtered out, and then discharged into the collection tank by the water pump for treatment. After the microbial electro-Fenton system generates a stable voltage, the bilge water is pumped into the microbial electro-Fenton system to adsorb and degrade TOC and COD in the bilge water to achieve the purpose of purifying the bilge water. If the treated bilge water meets the discharge requirements, it will be sent to the storage tank for water use in ship toilets or for diluting bilge water with high concentration; if it does not meet the standard, it will flo...

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Abstract

The invention discloses a single-chamber microbial electro-Fenton system and an application thereof. The single-chamber microbial electro-Fenton system comprises an anode, a cathode and an electrolytesolution; the anode and the cathode are arranged in a same single chamber; the anode comprises an anode base material formed by rolling multiple layers of carbon cloth and a plastic net, and the plastic net is arranged between the carbon cloth and used for separating the carbon cloth; mixed bacteria are loaded on the anode base material; the mixed bacteria are composed of rhodopseudomonas palustris, proteus vulgaris, bacillus toyonensis and alcanivorax pacificus; the cathode comprises a support made of a titanium mesh, and the support is filled with activated carbon powder loaded with graphene and cobalt; the electrolyte solution comprises sewage to be treated and added nutrient substances; and the mixed bacteria decompose organic matters in the sewage to be treated to generate electronsfor the cathode to use. The current density generated by degrading organic pollutants by the mixed bacteria loaded on the anode is high, the energy consumption required by the electro-Fenton reactionof the cathode can be met, and extra electric energy does not need to be consumed.

Description

technical field [0001] The invention relates to the technical field of ship oily sewage treatment, in particular to a single-chamber microbial electro-Fenton system and its application. Background technique [0002] Ship bilge water is relatively common wastewater generated during the operation of ship engine room equipment. Inside the ship engine room equipped with various power devices and pipeline systems, due to ship vibration, equipment aging, pipeline corrosion and holes And due to improper maintenance and management, oil phase leakage will occur, which will mix with various leakage water accumulated in the engine room, resulting in a large amount of oily sewage containing different petroleum oil products such as crude oil, diesel oil, heavy oil, and lubricating oil. Bilge water contains a large amount of total organic carbon (TOC), nutrients and reducing substances. The oil-water separation equipment currently used on ships can only reduce the content of oil pollutant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F101/30
CPCC02F3/005C02F2305/026C02F2101/30C02F2103/008Y02E60/50
Inventor 石建强张桂臣张少君王明雨
Owner SHANGHAI MARITIME UNIVERSITY
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