Integrated electrochemical coupled membrane aerated biofilm reactor and its application

An aerated biological and electrochemical technology, applied in chemical instruments and methods, biological water/sewage treatment, water pollutants, etc., can solve problems such as accumulation and impact on effluent water quality, and achieve improved removal efficiency, efficient oxidation degradation and high efficiency The effect of mineralization removal

Active Publication Date: 2021-06-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the electrochemical advanced oxidation method is difficult to effectively mineralize organic pollutants, the intermediate products produced by the oxidation and degradation of antibiotics and other refractory organic pollutants are easy to accumulate in the system and enter the water body with the effluent, thus affecting the quality of effluent water

Method used

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  • Integrated electrochemical coupled membrane aerated biofilm reactor and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An integrated electrochemically coupled membrane aerated biofilm reactor, including water inlet pipe 1, water inlet pump 11, reactor shell 2, tubular iridium tantalum titanium anode 5, titanium wire mesh cathode 3, PVDF bubble-free aeration hollow Fiber membrane 6, aeration system, regulated DC power supply 8 and water outlet pipe 9; one end of the water inlet pipe 1 is placed in a perforated water tank 21 arranged on the top of the reactor shell 2, and the water inlet pipe 1 is provided with an inlet pump 11 ; The titanium mesh cathode 3 is located in the reactor housing 2, the titanium mesh cathode 3 is columnar, and the titanium mesh cathode 3 is connected to the negative pole of the power supply 8 through a wire; the tubular iridium tantalum titanium anode 5 is placed in the titanium The inner side of the wire mesh cathode 3, the distance between the outer side of the tubular iridium tantalum titanium anode 5 and the titanium mesh cathode 3 is 5 mm, and the tubular i...

Embodiment 2

[0032] The same integrated electrochemically coupled membrane aerated biofilm reactor as in Example 1 was used to treat simulated surface water containing sulfadiazine, and the experimental conditions were set as: influent COD 45mg / L, NH4 + -N 2mg / L, sulfadiazine 100μg / L, aeration pressure 0.02MPa, regulated DC power supply voltage 1.5V, influent flow rate 1.7L / d, hydraulic retention time in electrolysis zone 5h, hydraulic retention time in biological zone It is 7.2h. Other conditions were the same, and the reactor without external electric field was set as the blank control group. Running in the continuous flow mode for 40 days, the results showed that the effluent COD of the two reactors was lower than 5mg / L, and the removal rate of sulfadiazine in the blank group was about 30%. The removal rate of sulfadiazine in the coupled membrane aerated biofilm reactor can reach more than 90%.

Embodiment 3

[0034] The same integrated electrochemically coupled membrane aerated biofilm reactor as in Example 1 was used to treat simulated surface water containing sulfadiazine, and the experimental conditions were set as: influent COD 45mg / L, NH4 + -N 2mg / L, sulfadiazine 100μg / L, aeration pressure 0.02MPa, regulated DC power supply voltage 1.0V, influent flow rate 1.7L / d, electrolysis zone hydraulic retention time 7h, biological zone hydraulic retention time for 10h. Other conditions were the same, and the reactor without external electric field was set as the blank control group. Running in the continuous flow mode, running continuously for 40 days, the results show that the COD of the effluent of the two reactors is lower than 5mg / L, and the removal rate of sulfadiazine in the blank group is about 35%. The removal rate of sulfadiazine in the coupled membrane aerated biofilm reactor can reach more than 90%.

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Abstract

The invention discloses an integrated electrochemical coupling membrane aeration biofilm reactor and application thereof, belonging to the technical field of sewage treatment. The reactor includes water inlet pipe, water inlet pump, reactor shell, tubular iridium tantalum titanium anode, titanium wire mesh cathode, bubble-free aeration hollow fiber membrane, water outlet pipe and aeration system; one end of the water inlet pipe is placed in the reactor shell Inside the body; the titanium mesh cathode is located in the reactor shell, the titanium mesh cathode is columnar and electrically connected to the negative electrode of the power supply; the tubular iridium tantalum titanium anode is placed inside the titanium mesh cathode and electrically connected to the positive electrode of the power supply; no bubble exposure The air hollow fiber membrane is placed in the inner cavity of the tubular iridium tantalum titanium anode; the aeration system includes an aeration pump, an air inlet pipe and an exhaust pipe respectively connected to the upper and lower ends of the non-bubble aeration hollow fiber membrane; the outlet pipe and the tubular iridium tantalum The inner cavity of the titanium anode is connected. When the reactor of the present invention operates in a continuous flow mode, it can realize efficient oxidative degradation and mineralization removal of refractory organic matter, and greatly improve the removal efficiency of refractory organic pollutants.

Description

technical field [0001] The invention specifically relates to an integrated electrochemical coupling membrane aeration biofilm reactor and its application, belonging to the technical field of sewage treatment. Background technique [0002] With the wide application of compounds such as drugs and personal care products, toxic, harmful and refractory organic substances such as antibiotics can enter water bodies through various channels. Conventional treatment methods are usually unable to effectively remove these micro or trace organic substances, and once they enter the water body, they will cause serious secondary pollution problems. [0003] Membrane-aerated biofilm reactor (MABR) is a sewage biological treatment process that uses a gas-permeable membrane for aeration and oxygen supply. Dissolved oxygen diffuses into the biofilm through a gas-permeable membrane to oxidize pollutants. At the same time, the gas-permeable membrane can also be used as a carrier for biofilm grow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/4672C02F3/1268C02F2101/30
Inventor 王志伟李胄彦王雪野陈妹许军
Owner TONGJI UNIV
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