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Three-dimensional electrode coupled microbial electrolysis cell ammonia-nitrogen wastewater treatment ammonia gas recovery device

A technology of microbial electrolytic cell and three-dimensional electrode, which is applied in the field of three-dimensional electrode coupling microbial electrolytic cell to treat ammonia nitrogen wastewater and recover ammonia gas, to achieve the effect of improving recovery efficiency, facilitating long film and wastewater treatment

Pending Publication Date: 2018-06-29
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of microbial electrolytic cells for ammonia gas recovery is rarely reported in China, and some foreign scholars are conducting research

Method used

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  • Three-dimensional electrode coupled microbial electrolysis cell ammonia-nitrogen wastewater treatment ammonia gas recovery device
  • Three-dimensional electrode coupled microbial electrolysis cell ammonia-nitrogen wastewater treatment ammonia gas recovery device
  • Three-dimensional electrode coupled microbial electrolysis cell ammonia-nitrogen wastewater treatment ammonia gas recovery device

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Experimental program
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Effect test

Embodiment 1

[0025] The structure of the present invention is as figure 1 and 2 Shown:

[0026] 1. Microbial electrolytic cell cathode and anode chambers

[0027] The electrolytic cell designed for the experiment to be carried out is divided into a cathode chamber and an anode chamber.

[0028] The anaerobic digestion wastewater to be treated is intermittently fed into the anode chamber. In the early stage of the cathode, 0.1mol / L NaSO4 is used as the electrolyte, and air is introduced into the cathode through the aeration device, and the oxygen will obtain electrons at the cathode and become hydroxide, which will become the main electrolyte. Driven by an external power supply, ammonium ions It will pass through the cation exchange membrane and enter the cathode to combine with hydroxide to generate ammonia gas. The cathode chamber of the electrolytic cell is in the shape of a cylinder, and the anode chamber is in the shape of a coaxial circular cylinder, which is coaxial with the cath...

Embodiment 2

[0067] Such as Figure 4 As shown, on the basis of Embodiment 1, the tubular exit port is modified into a hole-shaped exit hole. And there are four convex arched water inlets 3, and every two convex arched water inlets 3 are connected to a pump 6. If necessary, the round arch can be covered with a layer of rubber film at the same small hole position, that is, only one side of the water is allowed to enter, effectively preventing sludge from sinking into the round arch and preventing clogging.

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Abstract

The invention discloses a three-dimensional electrode coupled microbial electrolysis cell ammonia-nitrogen wastewater treatment ammonia gas recovery device. The three-dimensional electrode coupled microbial electrolysis cell ammonia-nitrogen wastewater treatment ammonia gas recovery device comprises a cylindrical cathode chamber; the cylindrical cathode chamber is sleeved by a cylindrical anode chamber; the cathode chamber and the anode chamber are separated by a cation exchange membrane; the bottom of the cylindrical anode chamber is provided with an electrolytic cell support; an anode chamber sludge outlet and an upward convex circular arch shaped water inlet are formed on the bottom of the anode chamber. The three-dimensional electrode coupled microbial electrolysis cell ammonia-nitrogen wastewater treatment ammonia gas recovery device is used for recovery of ammonia in ammonia-nitrogen wastewater using the three-dimensional electrode coupled microbial electrolysis cell; cathode aeration is adopted to obtain a large amount of hydroxide ions, and realize separation recovery of ammonia gas in the form of NH<4+>; the three-dimensional electrode coupled microbial electrolysis cell ammonia-nitrogen wastewater treatment ammonia gas recovery device is economical, and is high in efficiency; and in addition, a pump is adopted for driving of sludge and water internal circulating, theupward convex circular arch shaped water inlet is adopted, and the top of the upward convex circular arch shaped water inlet is uniformly provided with a plurality of small holes, so that the contactefficiency of the anode material, three-dimensional materials, and sludge and water is increased, and it is beneficial for early stage membrane culturing and later stage wastewater treatment.

Description

technical field [0001] The invention belongs to the field of waste treatment, and in particular relates to a three-dimensional electrode-coupled microbial electrolytic cell for treating ammonia nitrogen wastewater and recovering ammonia gas. Background technique [0002] Compared with aerobic digestion, the anaerobic digestion process does not require repeated disinfection treatment, saves energy consumption, and simplifies the production process. It is a relatively reasonable means of sludge treatment at present. However, the sludge filter press wastewater still has the characteristics of high COD and high ammonia nitrogen after anaerobic digestion, and the C / N ratio is seriously out of balance, which is a typical high ammonia nitrogen wastewater. At present, most of the anaerobic digestion wastewater in the industry is directly discharged without treatment, or is treated with a stripping tank, and the recovery effect of ammonia nitrogen is not ideal. [0003] Microbial el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/00C01C1/02C02F101/16
CPCC01C1/02C02F3/005C02F3/34C02F2209/08C02F2209/14C02F2203/006C02F2101/16
Inventor 马晶伟周晓阳杨正涵胡颖荣书铭
Owner HUNAN UNIV
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