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PVA production apparatus wastewater treatment method

A technology of production equipment and treatment method, which is applied in the field of wastewater treatment of PVA production equipment, can solve problems such as failure to meet discharge standards, achieve significant economic and social benefits, simple maintenance, and achieve discharge standards

Active Publication Date: 2016-06-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Iron-carbon micro-electrolysis treatment of industrial wastewater has the advantages of simple process and obvious effect, but for some difficult-to-treat and refractory industrial wastewater, a single iron-carbon micro-electrolysis treatment cannot meet the discharge standards or achieve satisfactory results. Therefore, it needs to be combined with other The process is further processed in depth

Method used

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  • PVA production apparatus wastewater treatment method

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Effect test

Embodiment 1

[0055] Embodiment 1: the PVA production plant waste water of certain enterprise, COD is 1600mg / L, and pH is 7.5, and main pollutant is PVA and acetate, and processing steps are as follows:

[0056] Step 1: pretreatment, adding sulfuric acid to the waste water of the PVA production plant to adjust its pH to 2;

[0057] Step 2: Iron-carbon micro-electrolysis, the above-mentioned pretreated PVA production plant wastewater enters the iron-carbon micro-electrolysis reaction tank, aeration reaction, the gas-water ratio is 6:1, stays for 1h, Fe in the treated PVA production plant wastewater 2+ The concentration is 100mg / L;

[0058] Step 3: Fenton oxidation, the wastewater from the PVA production plant treated by iron-carbon micro-electrolysis enters the Fenton oxidation reaction pool, and H 2 o 2 , the concentration is 1500mg / L, stir to react, and stay for 4h;

[0059] Step 4: Flocculation and sedimentation, add sodium hydroxide to the effluent after Fenton oxidation, adjust the p...

Embodiment 2

[0062] Embodiment 2: the PVA production plant waste water of certain enterprise, COD is 1000mg / L, and pH is 6.5, and main pollutant is PVA and acetate, and processing steps are as follows:

[0063] Step 1: pretreatment, adding sulfuric acid to the waste water of the PVA production plant to adjust its pH to 4;

[0064] Step 2: Iron-carbon micro-electrolysis, the wastewater from the PVA production plant after the above pretreatment enters the iron-carbon micro-electrolysis reaction tank, aeration reaction, the gas-water ratio is 10:1, and stays for 2 hours. After the treatment, Fe in the wastewater from the PVA production plant 2+ The concentration is 300mg / L;

[0065] Step 3: Fenton oxidation, the wastewater from the PVA production plant treated by iron-carbon micro-electrolysis enters the Fenton oxidation reaction pool, and H 2 o 2 , the concentration is 500mg / L, stir to react, and stay for 2h;

[0066] Step 4: flocculation and sedimentation, adding potassium hydroxide to t...

Embodiment 3

[0069] Embodiment 3: the PVA production plant waste water of certain enterprise, COD is 1300mg / L, and pH is 7, and main pollutant is PVA and acetate, and processing steps are as follows:

[0070] Step 1: pretreatment, adding sulfuric acid to the waste water of the PVA production plant to adjust its pH to 3;

[0071] Step 2: Iron-carbon micro-electrolysis, the wastewater from the PVA production plant after the above pretreatment enters the iron-carbon micro-electrolysis reaction tank, aeration reaction, the gas-water ratio is 8:1, and stays for 1.5h. Fe in the wastewater from the PVA production plant after treatment 2+ The concentration is 200mg / L;

[0072] Step 3: Fenton oxidation, the wastewater from the PVA production plant treated by iron-carbon micro-electrolysis enters the Fenton oxidation reaction pool, and H 2 o 2 , the concentration is 1000mg / L, stir to react, and stay for 3h;

[0073] Step 4: Flocculation and sedimentation, add sodium hydroxide to the effluent afte...

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Abstract

The invention relates to a PVA production apparatus wastewater treatment method. The method comprises the following steps: 1, adjusting the pH value of production apparatus wastewater to 2-4; 2, allowing the production apparatus wastewater to enter an iron-carbon micro-electrolysis reaction tank and to react; 3, allowing the production apparatus wastewater to enter a Fenton oxidation reaction tank and to react; 4, adding an alkali to yielding water discharged from the Fenton oxidation reaction tank to flocculate and settle iron ions in the yielding water; 5, allowing the yielding water discharged from the Fenton oxidation reaction tank to enter a primary aerobic reaction tank and to react; and 6, allowing yielding water discharged from the primary aerobic reaction tank to enter a secondary aerobic reaction tank and to react, settling yielding water discharged from the secondary aerobic reaction tank through a secondary sedimentation tank, and discharging standard reaching water. The treatment method adopts a combination technology to solve the defect of incomplete removal of COD from the PVA production apparatus wastewater by adopting single technologies, finally realizes standard reaching discharge of the PVA production apparatus wastewater through advanced treatment of the PVA production apparatus wastewater, and has the advantages of substantial treatment effect, simple maintenance, less investment and low cost.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment of industrial production devices, in particular to a treatment method of wastewater of PVA production devices. In particular, it refers to the method of advanced treatment of wastewater from PVA production units by using the "iron-carbon micro-electrolysis + Fenton oxidation + secondary aerobic" process. Background technique [0002] Industrial wastewater is an important source of water pollution, accounting for about 40 to 50% of my country's total sewage discharge. Industrial wastewater contains high concentrations of refractory pollutants, resulting in poor biodegradability and high salinity. Achieving emission standards through conventional treatment methods will cause huge pressure on the enterprise itself and the surrounding environment. [0003] PVA (polyvinyl alcohol) is a water-soluble polymer with a wide range of uses. It is divided into two major uses: fiber and non-fiber. ...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F103/38
Inventor 李昕阳邱松魏令勇杨芳芳侯秀华
Owner CHINA PETROLEUM & CHEM CORP
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