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Device and process for treating high-concentration organic wastewater containing PVA

An organic wastewater and high-concentration technology, which is applied in filtration treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of harsh reaction conditions, poor treatment effect, and low cost of physical methods, and achieve convenient operation and maintenance. Wide range and good processing effect

Pending Publication Date: 2016-11-23
NANJING BAIYUN CHEM ENVIRONMENTAL MONITORING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of the physical method is lower, but the treatment effect is poor; the treatment effect of the biochemical method is better, but the cost is high, the requirements for the reaction equipment are high, and the reaction conditions are harsh
At present, the treatment of PVA wastewater is still a difficult problem, and its treatment effect and cost have not yet reached the ideal standard.

Method used

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  • Device and process for treating high-concentration organic wastewater containing PVA

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Effect test

Embodiment 1

[0022] see figure 1 , a device for treating high-concentration organic wastewater containing PVA, including connected iron-carbon micro-electrolysis reaction pools 3, sedimentation tanks 4, Fenton reactors 5 and clear water pools 6 connected in sequence according to the wastewater entering, and the water storage tank 1 is metered Pump 2 links to each other with iron-carbon micro-electrolysis reaction cell 3, iron-carbon micro-electrolysis reaction cell 3 links to each other with oxygenator 12, is filled with iron-carbon filler 7 at the bottom of described iron-carbon micro-electrolysis reaction cell, in described iron-carbon A stirring device 8 is arranged in the upper part of the micro-electrolysis reaction pool, and the Fenton reactor 5 passes through the ferrous sulfate feeding pipe and the hydrogen peroxide feeding pipe and the ferrous sulfate replenishing tank 9 hydrogen peroxide replenishing tank 10 respectively.

[0023] Preferably, the Fenton reactor 5 is provided with...

Embodiment 2

[0025] A process utilizing the device described in Implementation 1 to process PVA-containing high-concentration organic wastewater, comprising the steps of:

[0026] 1) Add alkali to the water storage tank 1, and adjust the pH of the high-concentration organic wastewater containing PVA (COD is 2200mg / L) to 8-10;

[0027] 2) The pH-adjusted waste water is transported to the iron-carbon micro-electrolysis reaction tank 3 through the metering pump 2, and when it is aerated by the oxygenator 12, the ratio of gas to water is 6:1, and the stirring device is started at the same time 8. Carry out iron-carbon micro-electrolysis treatment for 5-8 hours;

[0028] 3) Enter the sedimentation tank 4 after iron-carbon micro-electrolysis treatment, and add CPAM to the sedimentation tank 4 for flocculation and precipitation;

[0029] 4) After flocculation and sedimentation, the effluent from the sedimentation tank 4 enters the Fenton reactor 5, adding acid to adjust the pH to 3-5, adding fer...

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Abstract

The invention discloses a device for treating high-concentration organic wastewater containing PVA. The device comprises an iron-carbon micro-electrolysis reaction tank, a sedimentation tank, a Fenton reactor and a clean water tank which are arranged and communicated along a wastewater incoming sequence, a water storage tank is connected with the iron-carbon micro-electrolysis reaction tank through a metering pump, the iron-carbon micro-electrolysis reaction tank is connected with an oxygenator, the bottom of the iron-carbon micro-electrolysis reaction tank is filled with an iron-carbon filler, a stirring device is arranged in the upper portion of the iron-carbon micro-electrolysis reaction tank, and the Fenton reactor is connected with a ferrous sulfate replenishment tank and a hydrogen peroxide replenishment tank through a ferrous sulfate feeding pipe and a hydrogen peroxide feeding pipe. Electro-electrolysis flocculation pretreatment is performed through the iron-carbon micro-electrolysis reaction tank, and then polyacrylamide flocculation treatment is performed further, so that COD of the wastewater is lowered substantially, little particles, metal particles and organic macromolecules PVA dispersed in the wastewater are adsorbed, cost is saved for subsequent Fenton treatment in the Fenton reactor, and up-to-standard emission of the wastewater is realized finally.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a device and a process for treating high-concentration organic wastewater containing PVA. Background technique [0002] High-concentration organic wastewater generally refers to wastewater with COD above 2000mg / L discharged from papermaking, leather and food industries. These wastewater contain a large amount of organic matter such as carbohydrates, fats, proteins, and cellulose. Seriously polluted, high-concentration organic wastewater can be divided into three categories according to its nature and source: (1) high-concentration organic wastewater that is easy to biodegrade; (2) wastewater that can degrade organic matter but contains harmful substances; (3) biodegradable and harmful high-concentration organic wastewater. [0003] Polyvinyl alcohol (PVA for short) is the only organic polymer compound with water activity among the polymers found so far. Because of its good chemi...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F9/00C02F1/001C02F1/722C02F1/56C02F1/66C02F1/5281C02F1/46104C02F1/463C02F1/4672C02F1/4676C02F2301/08C02F2305/026
Inventor 胡家富王轩王芸刘婷婷王海珍
Owner NANJING BAIYUN CHEM ENVIRONMENTAL MONITORING
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