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Iron-aluminum aeration micro-electrolysis sewage treatment process

A technology for sewage treatment and micro-electrolysis, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., and can solve problems such as unreported

Inactive Publication Date: 2015-08-26
SHAOXING WATER TREATMENT DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although domestic and foreign scientists mostly focus on the iron-copper catalysis method and aluminum-copper catalysis method for the treatment of printing and dyeing wastewater and other wastewater, there are no experimental studies on the treatment of printing and dyeing wastewater by using iron and aluminum electrolytic catalysis. to report

Method used

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  • Iron-aluminum aeration micro-electrolysis sewage treatment process
  • Iron-aluminum aeration micro-electrolysis sewage treatment process
  • Iron-aluminum aeration micro-electrolysis sewage treatment process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1 Experimental part

[0022] 1.1 Source of wastewater

[0023] The test water sample was taken from the effluent of the second phase steady flow pond of Shaoxing Water Treatment Development Co., Ltd. in Shaoxing Binhai Industrial Zone. Printing and dyeing wastewater water quality: COD is 800-1300 mg / L, pH is 6.80-7.5, chroma is 150-250 times; SS mass concentration is 200-350 mg / L.

[0024] 1.2 Experimental materials and instruments

[0025] The aluminum flakes used in the iron-aluminum mixture are thin slices and cut into thin strips for later use. The iron is in the form of iron shavings (38CrMoAl), which is waste from mechanical processing plants; the drugs used in the test mainly include NaOH, sulfuric acid, potassium dichromate, mercury sulfate, Silver sulfate, ferrous ammonium sulfate, hydrochloric acid, hydroxylamine hydrochloride, glacial acetic acid, o-phenanthroline, etc., are all analytically pure.

[0026] The testing instruments used are: Lemag PHS-2F pH meter; TU18...

Embodiment 2

[0039] 2.1 Source of wastewater

[0040] The test water samples were taken from the first-phase pretreatment influent water of Shaoxing Water Treatment Development Co., Ltd. in Shaoxing Binhai Industrial Zone. The quality of printing and dyeing wastewater: COD is 700~1100 mg / L, pH is 6.80~8.6, chromaticity is 250~350 times. The mass concentration of SS is 200~350 mg / L.

[0041] 2.2 Process flow

[0042] The first-stage sewage lift pump room is connected to the first-stage inlet water, and it is introduced into the catalytic device equipped with iron and aluminum mixture for aeration treatment. After the separation in the middle sedimentation tank, the effluent enters the biochemical tank and is treated by the traditional activated sludge SBR method. An independent sludge return system is set up in the biochemical section, see the detailed process flow chart Figure 5 Shown.

[0043] In a device with a certain amount of Fe / Al mass ratio and filler ratio (0.1kg / L), an aeration device ...

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Abstract

The invention relates to an iron and aluminum aeration micro-electrolysis wastewater treatment process, which belongs to the technical field of printing and dyeing wastewater treatment. The iron and aluminum aeration micro-electrolysis wastewater treatment process comprises the following steps: adding wastewater to be treated into an iron and aluminum mixture, sealing, rotating and reacting at a constant temperature, regulating the pH value after the reaction, standing to precipitate after stirring and coagulating, and discharging the supernatant after removing the lower layer precipitate. Compared with conventional treatment methods, the iron and aluminum aeration micro-electrolysis wastewater treatment process in the technical scheme of the invention generates relatively stable variation on such factors as regulation capacity of chemical wastewater pH, Fe<2+> generation concentration, COD removal rate and B / C and the like, the COD removal rate is 50-60%, which is much higher than that of the traditional non-aeration pretreatment process stage, the chroma removal effect is good, and meanwhile, the B / C of the chemical wastewater is improved, the unfavorable effects of contained degradation-resistant pollutants on a biochemical system are reduced, and the alkali dosage is reduced to save the cost.

Description

Technical field [0001] The invention involves a kind of iron aluminum aeration of micro -electrolytic sewage treatment technology, which is the field of printing and dyeing wastewater treatment technology. Background technique [0002] The printing and dyeing wastewater discharged by the textile printing and dyeing industry is one of the key pollution sources in my country's industrial system.Its discharge wastewater has the characteristics of large water volume, high organic pollutant content, difficult to degrade substances, high chroma, and complex components.Due to the poor biodegradation performance of printing and dyeing wastewater, it is difficult to deal with biological treatment. It is often difficult to meet the traditional biochemical method.In recent years, it has attached great importance to the research on the combination process, especially the strengthening of pre -treatment of pre -treatment of the treatment of printing and dyeing wastewater. Micro -electrolysis ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06
Inventor 劳红标戴海润段凤君杨光丽钱建华王林君
Owner SHAOXING WATER TREATMENT DEV