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Efficient organic wastewater pretreatment method

A kind of organic wastewater and pretreatment technology, applied in water/sewage treatment, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve threats to human health, pollute the environment, and have no degradation effect and other issues, to achieve the effect of reducing infrastructure investment and operating costs, high degree of automation, improving processing efficiency and biodegradability

Inactive Publication Date: 2016-08-17
SINGAPORE SUZHOU IND PARK ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common characteristics of these substances are high toxicity, complex components, high COD, and general microorganisms have almost no degradation effect on them.
If these substances are discharged to the environment without adequate treatment, they will seriously pollute the environment and threaten human health.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a certain high-concentration chemical wastewater (COD in the range of 10000-30000mg / L) was adjusted to pH 3-5, then hydrogen peroxide with an effective volume concentration of 0.1-5% was added, and the resulting mixed solution was fed from the inlet pipe 2 below the reactor. It is passed into the reactor and injected into the hollow shell 1 of the reactor from the water distribution pipe 21 inside the water inlet pipe 2. The shell 1 is filled with iron-carbon filler 5 accounting for 30-100% of the reactor volume, and the waste water will pass through the iron The carbon filler 5 is discharged from the outlet pipe 3 after staying for a period of time for reaction. The specific effects of the treatment are as follows:

[0025]

[0026] It can be seen from the above table that after treatment, the COD removal rate of wastewater reaches more than 40%. In the present embodiment, the acidic wastewater containing hydrogen peroxide entering the r...

Embodiment 2

[0045] Such as figure 2 As shown, a high-concentration pharmaceutical wastewater (COD at 10,000-50,000 mg / L) was adjusted to pH 3-5, and then hydrogen peroxide solution with a volume concentration of 0.1-5% was added, and the resulting mixed solution was fed from the inlet pipe 2 below the reactor. It is injected into the shell 1 through the annular water distribution pipe 21, and the shell 1 is provided with a cylindrical guide tube 4, and the outside of the guide tube 4 is filled with iron-carbon filler 5 accounting for 30% to 90% of the reactor volume. There is also an annular aeration pipe 6 on the outside of the pipe 4. When the wastewater passes through the iron-carbon filler 5, the aeration pipe 6 continues to aerate and reflux. The reflux ratio is 0.5-2. The specific effects of the treatment are as follows:

[0046]

[0047] It can be seen from the above table that after treatment, the COD removal rate of wastewater reaches more than 50%. In this embodiment, the ...

Embodiment 3

[0052] Such as image 3 As shown, a high-concentration coking wastewater (COD in the range of 10,000-40,000 mg / L) was adjusted to pH 3-5, and then hydrogen peroxide solution with a volume concentration of 0.1-5% was added, and the resulting mixed solution was fed from the inlet pipe 2 below the reactor. into the reactor, where the reactor figure 2 On the basis of the water outlet pipe 3, an outlet valve 31 (normally open or periodic switch state can be adopted), and the waste water is discharged from the outlet pipe 3 after staying for a period of time.

[0053]

[0054]

[0055] It can be seen from the above table that after treatment, the COD removal rate of the wastewater reaches more than 50%, and the switching cycle of the outlet valve 31 has a certain positive effect on the improvement of the COD removal rate. In this embodiment, the outlet valve 31 can control the reactor to treat wastewater intermittently or continuously, and the outlet valve 31 can set the switc...

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Abstract

The invention belongs to the environmental-friendly technical field, and relates to an efficient organic wastewater pretreatment method. The efficient organic wastewater pretreatment method comprises the following steps: regulating the pH value of the wastewater to 3-5, adding hydrogen peroxide with effective volume concentration being 0.1-5%, introducing obtained mixed liquor into a reactor containing an iron-carbon filler therein to react, and finally discharging the mixed liquor. According to the efficient organic wastewater pretreatment method, the wastewater is simultaneously subjected to iron-carbon microelectrolysis, Fenton oxidation, flocculation precipitation, active carbon catalytic oxidization and the like, so that the treatment efficiency and biodegradability of the wastewater are greatly improved, and the investment and operation cost of capital construction can be reduced.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a pretreatment method for efficiently treating high-concentration refractory organic wastewater by performing multiple actions simultaneously. Background technique [0002] In recent years, with the rapid development of petrochemical, plastic, synthetic fiber, coking, printing and dyeing industries, various wastewater containing a large number of biodegradable organic pollutants has increased correspondingly, and their entry into water bodies has caused serious pollution to the environment. Environmental protection workers have made various attempts in the search for efficient and economical treatment of this type of wastewater, and many treatment methods have been proposed. [0003] Refractory organic matter refers to organic matter (including some metabolites of organic matter) that is decomposed by microorganisms very slowly and incompletely. Such pollutants ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/467C02F1/463C02F101/30
CPCC02F1/46104C02F1/463C02F1/4672C02F2101/30
Inventor 金月清
Owner SINGAPORE SUZHOU IND PARK ENVIRONMENTAL PROTECTION TECH CO LTD
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