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Water treatment device and application thereof

A water treatment device and wastewater treatment technology, which is applied in water/sewage treatment, natural water treatment, animal husbandry wastewater treatment, etc., can solve the problems of high wastewater treatment cost, increase wastewater treatment cost, increase system energy consumption, etc., and achieve saving The effect of energy expenditure

Active Publication Date: 2019-03-26
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] And with the increase of aeration intensity, the DO concentration of the system increases, and the corresponding H 2 o 2 As the output increases, the effect of wastewater treatment will also increase, and aeration, especially high-intensity aeration, will undoubtedly greatly increase the additional energy consumption of the system, thereby increasing the cost of wastewater treatment (the cost of aeration is generally 14.17 yuan / m 3 · d), making the cost of wastewater treatment too high, therefore, iron oxide-H 2 o 2 There are serious obstacles to the development of the method in the field of wastewater treatment

Method used

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  • Water treatment device and application thereof
  • Water treatment device and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0122] Specific steps are as follows:

[0123] according to figure 1 , using hydrophobic carbon black-PTFE as the gas diffusion layer, using a 50cm×50cm iron plate as an anode, and a 50cm×50cm graphite plate as a cathode, the working volume of the microalgae growth chamber is 150L (30cm×60cm×60cm). -The volume of the Fenton reaction chamber is 150L (50cm×50cm×60cm), and the distance between the electrodes is 20cm; the gas diffusion layer is fixed between the electro-Fenton reaction chamber and the microalgae cultivation chamber to obtain a water treatment device;

[0124] Pig farm wastewater (COD 2265mg / L, NH 4 + -N 829mg / L, TN 1210mg / L, TP 96mg / L) were continuously pumped into the first water inlet of the microalgae growth chamber, and inoculated with Chlorella vulgaris in the microalgae growth chamber, the inoculation initial concentration was 5×10 6 cell / mL, turn on the light source (consisting of four 8W LED lamp tubes) for light (light-to-dark ratio 12h:12h), Chlorell...

Embodiment 2

[0129] Specific steps are as follows:

[0130] according to figure 1 , with a 0.45 μm hydrophobic nylon filter membrane as the gas diffusion layer, a 50cm×50cm iron plate as the anode, and a 50cm×50cm graphite felt as the cathode, the volume of the microalgae growth chamber is 216L (60cm×60cm×60cm), and the electric -The volume of the Fenton reaction chamber is 72L (60cm×20cm×60cm), and the distance between the electrodes is 10cm; the gas diffusion layer is fixed between the electro-Fenton reaction chamber and the microalgae cultivation chamber to obtain a water treatment device;

[0131] Aquaculture wastewater (COD 87mg / L, NH 4 + -N 7.6mg / L, TN 26mg / L, TP 3.9mg / L) were continuously pumped into the first water inlet of the microalgae growth chamber, and inoculated with Dunaliella salina in the microalgae growth chamber, the inoculation initial concentration was 5×10 5 cell / mL, turn on the light source (consisting of a 38W fluorescent tube) for light (light-to-dark ratio is...

Embodiment 3

[0136] Specific steps are as follows:

[0137] according to figure 1 , with a hydrophobic treated dense stainless steel mesh as the gas diffusion layer, a 40cm×40cm iron mesh as the anode, and a 40cm×40cm graphite felt as the cathode, the volume of the microalgae growth chamber is 125L (50cm×50cm×50cm), and the electric -The volume of the Fenton reaction chamber is 72L (20cm×60cm×60cm), and the distance between the electrodes is 10cm; the gas diffusion layer is fixed between the electro-Fenton reaction chamber and the microalgae cultivation chamber to obtain a water treatment device;

[0138] Aquaculture wastewater (COD 200mg / L, NH 4 + -N 400mg / L, TN 498mg / L, TP 40mg / L) were continuously pumped into the first water inlet of the microalgae growth chamber, and Scenedesmus obliquus was inoculated in the microalgae growth chamber, and the inoculation initial concentration was 5×10 5 cell / mL, turn on the light source (consisting of three 8W LED lamp tubes) for light (light-to-d...

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Abstract

The invention discloses a water treatment device and application thereof, and belongs to the technical field of waste water treatment. The water treatment device can use microalgae photosynthesis forproviding O2 for the cathode reaction of electro-Fenton process; the H2O2 online synthesis is realized; the energy consumption of external aeration is greatly reduced; meanwhile, the water treatment device can realize microalgae grease production and contaminant efficient degradation; by using the device for sewage treatment for 13 d, the grease yield of microalgae in a microalgae growth chamber can be as high as 986 mg / L.d; by using the device for sewage treatment, the effluent COD, NH<4+>, N, TN and TP of the sewage in the microalgae growth chamber are respectively reduced by 57.8 percent, 74.4 percent, 64.9 percent and 84.4 percent in comparison with that of inflow; the effluent COD and the chrominance of the sewage in the electro-Fenton reaction chamber are respectively reduced by 92.6percent and 98.3 percent in comparison with that of inflow.

Description

technical field [0001] The invention relates to a water treatment device and its application, belonging to the technical field of wastewater treatment. Background technique [0002] In recent years, with the rapid development of domestic industry and agriculture, the discharge of refractory wastewater such as printing and dyeing wastewater, coking wastewater, phenolic wastewater, pesticide wastewater, and landfill leachate has continued to increase, and new refractory pollutants contained in refractory wastewater The types are also increasing day by day, and at the same time, the concentration is constantly increasing. These refractory pollutants are generally difficult to biodegrade, and will enter the water environment with the effluent of the sewage plant, making the problem of water environment pollution increasingly prominent. [0003] The electro-Fenton method is a sewage treatment method developed from the traditional Fenton chemical treatment method. In the electro-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/32C02F3/00C02F1/72C02F1/467C12M1/00
CPCC02F1/4672C02F1/725C02F3/005C02F3/322C02F2103/06C02F2103/20C02F2103/30C02F2103/32C02F2103/327C12M21/02C12M23/02
Inventor 任月萍吕莹李秀芬王新华
Owner JIANGNAN UNIV
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