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Alkaline printing and dyeing wastewater materialization pretreatment method and system

A printing and dyeing wastewater and pretreatment technology, which is applied in textile industry wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve problems such as difficulty in meeting design requirements, high medicament, high electric energy, and increased unit cost, and achieve Effects of simplifying wastewater treatment process, reducing energy consumption, and reducing biochemical load

Active Publication Date: 2010-11-24
佛山市三水区大塘污水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing combined sewage treatment process, the chromaticity and COD of the treated water can basically meet the standards, but the treatment process is complicated and the treatment efficiency is relatively low, which is difficult to meet the design requirements; The medicine and electric energy are higher, and the unit cost is higher

Method used

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  • Alkaline printing and dyeing wastewater materialization pretreatment method and system
  • Alkaline printing and dyeing wastewater materialization pretreatment method and system
  • Alkaline printing and dyeing wastewater materialization pretreatment method and system

Examples

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Effect test

Embodiment 1

[0027] Printing and dyeing wastewater comes from four different production periods of a printing and dyeing factory in Datang Industrial Park, Sanshui District, Foshan City, all of which are dark blue. After measurement, the pH value of the wastewater is 11-13, the COD is 1100-2800mg / L, and the chromaticity is 2000 The specific data is shown in Table 1. Take 100mL of wastewater in each of the four periods, numbered 1, 2, 3 and 4.

[0028] Ferrous sulfate, KW178, anionic polyacrylamide and other reagents are all commercial products.

[0029] Dissolve industrial ferrous sulfate, KW178, and anionic polyacrylamide in water, stir, and prepare the concentration to be 0.25×10 3 g / L, 78.13g / L and 0.41g / L solutions (other concentration experiments will not be repeated here one by one, the method is the same), and then the prepared ferrous sulfate solution is added to the printing and dyeing wastewater, adding an appropriate amount of ferrous sulfate After the solution, adjust the pH v...

Embodiment 2

[0033] Printing and dyeing wastewater comes from a printing and dyeing factory in Datang Industrial Park, Sanshui District, Foshan City at four different periods of time. About 500 times, the specific data is shown in Table 2, respectively take 100mL of wastewater in each of the four periods, and number 1, 2, 3 and 4.

[0034] Ferrous sulfate, KW178, anionic polyacrylamide and other reagents are all commercial products.

[0035] Dissolve industrial ferrous sulfate, KW178, and anionic polyacrylamide in water, stir, and prepare the concentration to be 0.25×10 3 g / L, 78.13g / L and 0.41g / L solutions, then add the prepared ferrous sulfate solution into the printing and dyeing wastewater, add an appropriate amount of ferrous sulfate solution, and adjust the pH value of the wastewater to 7-9; Add an appropriate amount of 78.13g / L KW178 solution to the printing and dyeing wastewater, and add 0.41g / L anionic polyacrylamide solution after reacting for 2 to 5 minutes. The processing eff...

Embodiment 3

[0040] Printing and dyeing wastewater comes from a dyeing and finishing factory in Datang Industrial Park, Sanshui District, Foshan City. The wastewater is black in four different periods. It will be measured that the pH value of the wastewater is 12-14, the COD is 2200-3000mg / L, and the chromaticity is about 2000 times. , the specific data are shown in Table 3, respectively take 100mL of waste water in each of the four periods, and number 1, 2, 3 and 4.

[0041] Ferrous sulfate, KW178, anionic polyacrylamide and other reagents are all commercial products.

[0042] Dissolve industrial ferrous sulfate, KW178, and anionic polyacrylamide in water, stir, and prepare the concentration to be 0.25×10 3 g / L, 78.13g / L and 0.41g / L solutions, and then add the prepared ferrous sulfate solution into the printing and dyeing wastewater, after adding an appropriate amount of ferrous sulfate solution, the pH value of the wastewater is adjusted to 7-9; Add an appropriate amount of 78.13g / L KW1...

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Abstract

The invention discloses an alkaline printing and dyeing wastewater materialization pretreatment method and an alkaline printing and dyeing wastewater materialization pretreatment system. The alkaline printing and dyeing wastewater materialization pretreatment method comprises the following steps of: adding the solution of ferrous sulfate into wastewater, and performing acid-base neutralization and redox reaction on the solution of ferrous sulfate and the wastewater; and adding a macromolecular organic decoloring agent and a coagulant acid for treatment, and performing solid-liquid separation. Through the method and the system, in the pretreatment stage, most of chromaticity and chemical oxygen demand (COD) is removed by materialization treatment, which reduces water-soluble biorefractory substance content, greatly reduces the basicity of the wastewater, weakens impact on a biochemical stage, reduces biochemical load and reduces the energy consumption so as to simplify subsequent wastewater treatment processes and improve the treatment efficiency.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and relates to a physical wastewater pretreatment process, in particular, to a physical and chemical pretreatment process in textile printing and dyeing wastewater combined physicochemical and biochemical treatment processes. technical background [0002] During the printing and dyeing production process, a large amount of highly polluted, highly alkaline or acidic wastewater will be produced. This type of wastewater has high pollution indexes such as chroma, suspended solids concentration, chemical oxygen demand (COD), and biological oxygen demand (BOD). Generally, organic pollutants are the main ones, many of which are toxic and harmful substances. Direct discharge into farmland and water bodies will cause serious environmental pollution. And with the change of fabric properties, dye type, quantity and chemical agents used, the quality and quantity of waste water are ver...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F1/56C02F103/30
Inventor 邓丽芳姚颖康巨雷张斐然袁勇
Owner 佛山市三水区大塘污水处理有限公司
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