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Water treatment device and method using photoelectrocatalysis purification

A photoelectric catalysis and treatment device technology, applied in the field of water treatment, can solve the problems of difficult large-scale application, high overall energy consumption, high current density, etc., and achieve the effects of small space occupation, low treatment cost and short time

Inactive Publication Date: 2016-07-27
上海纳晶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the expensive materials such as Pt, IrO, and diamond, their application in the field of wastewater treatment is limited; while PbO 2 Although the cost is low, the application of this method is also limited due to the possible precipitation of Pb element during the reaction process and causing secondary pollution.
In addition, the direct use of this type of electrochemical oxidation process requires a large current density (10-500mA / cm 2 ), the overall energy consumption is large, and it is not easy to apply on a large scale

Method used

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  • Water treatment device and method using photoelectrocatalysis purification
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  • Water treatment device and method using photoelectrocatalysis purification

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Embodiment one, cooling circulating water:

[0045] A large amount of cooling circulating water is needed in the industrial production process, and this water needs to be softened before it can be used. After repeated cycles, due to the evaporation of water, calcium, magnesium ions, and organic matter (bacteria) in the water will accumulate, making the pipeline easy to block. The index of typical cooling cycle raw water is TDS is 800mg / L, Ca 2+ 150mg / L, Mg 2+ 40mg / L, COD 50mg / L. After adopting the photoelectric catalytic purification water treatment device of the present invention at a voltage of DC12V, a current density of 0.1mA / cm 2 , energy consumption is 0.12KWh / m 3 , water index after 30min treatment, TDS is 530mg / L, Ca 2+ 60mg / L, Mg 2+ 10mg / L, COD 20mg / L; water index after 60min treatment, TDS 310mg / L, Ca 2+ 12mg / L, Mg 2+ 2mg / L, COD 6mg / L. PEC can be used for on-line softening of cooling circulating water and removal of organic matter.

Embodiment 2

[0046] Embodiment two, printing and dyeing wastewater:

[0047] Printing and dyeing wastewater contains a variety of organic compounds, including benzene, phenol, azo compounds, and phosphorus, sulfur and other compounds. The wastewater is highly toxic, dark in color, and has poor biochemical properties. It is a difficult wastewater to treat. Generally, chemical flocculation, fresh water dilution, and microbial treatment are used, and the treatment cost is relatively high. Typical printing and dyeing wastewater, COD is 1500mg / L, TDS is 600mg / L, and the color is dark blue, which can be directly treated by the photoelectric catalytic water purification treatment device of the present invention, with a voltage of DC12V and a current density of 0.2mA / cm 2 , energy consumption is 0.3KWh / m 3 , each treatment time is 30min. After 3 cycles of treatment, the COD is 40mg / L, with a removal rate of over 98%, the soluble solid TDS is 350mg / L, a drop of over 40%, and other indicators such...

Embodiment 3

[0048] Embodiment three, culture waste water:

[0049] Aquaculture wastewater is discharged in large quantities in rural areas, causing serious environmental pollution. This type of wastewater has good biodegradability. For large-scale farms, typical microbial processes including anaerobic and aerobic processes can be used for treatment, and the generated biogas can also be used for heat or power generation. For small and medium-sized farms, because the amount of wastewater produced is unstable, and the microbial treatment covers a large area and the treatment cycle is long, the generated biogas and biogas slurry are not suitable for treatment, and the relative cost is relatively high, so it is not suitable for application. Taking small and medium-sized pig farms as an example, the wastewater from pig farms is mainly waste water such as feces and urine and feed washing, black and yellow wastewater, containing high-concentration organic matter, ammonia nitrogen, sulfide, bacter...

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Abstract

The invention relates to the technical field of water treatment, in particular to a water treatment device and method using photoelectrocatalysis purification. The device comprises a catalytic reaction chamber and is characterized in that a mud storage hopper is connected to the lower end of the catalytic reaction chamber, and a mud discharge outlet is connected to the lower end of the mud storage hopper; a water inlet is formed in one end above the catalytic reaction chamber, and the other end above the catalytic reaction chamber is provided with a water outlet; a mud discharge tank is arranged at the rear of the catalytic reaction chamber, and a mud discharge outlet is connected to the lower end of the mud discharge tank; the catalytic reaction chamber located in front of the water outlet is provided with a mud scraper. Compared with the prior art, the water treatment device has the advantages that the synergic effect of visible light catalyzing and electro-catalysis is utilized, low-cost composite material is used as the anode material with a photoelectrocatalysis function, and the photoelectrocatalysis device of a capacitive structure is manufactured to effectively treat various organic wastewater.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a photoelectric catalytic purification water treatment device and a treatment method. Background technique [0002] With the development of society and the growth of population, energy and water resources have become the bottlenecks restricting the development of today's society. The amount of water used for life and production is increasing year by year, and the amount of wastewater discharged is also increasing accordingly. The environmental level of many drainages has exceeded the limit of natural ecological purification, making the water environment more and more polluted. Water pollution mainly includes heavy metal ions and organic pollution. At present, chemical flocculation, microbial decomposition, membrane filtration and other methods are mainly used. The chemical flocculation method needs to add a large amount of flocculants such as aluminum sulfate, ferrous s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/48C02F101/30
CPCY02W10/37C02F1/30C02F1/305C02F1/48C02F2101/30
Inventor 孙卓孙新昊刘素霞
Owner 上海纳晶科技有限公司
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