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Pretreatment system and pretreatment method for high-concentration refractory organic wastewater

An organic wastewater, refractory technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of iron-carbon scab, inoperability, easy consumption, etc., to achieve Improved biochemical properties, prevention of iron-carbon scab, and improved degradation efficiency

Inactive Publication Date: 2015-06-17
杭州智水水务科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The disadvantage of this method is that the precipitation of iron during iron-carbon reaction can easily lead to iron-carbon scabs. After long-term operation of micro-electrolysis, iron filings are easy to harden, resulting in a significant decline in treatment effect, or even failure to operate.
[0007] This method does not directly add iron filings during the iron-carbon reaction, but adds nano-material zero-valent iron, but the preparation process of zero-valent iron is complicated and easy to consume, which increases the processing cost

Method used

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  • Pretreatment system and pretreatment method for high-concentration refractory organic wastewater
  • Pretreatment system and pretreatment method for high-concentration refractory organic wastewater
  • Pretreatment system and pretreatment method for high-concentration refractory organic wastewater

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Embodiment 1

[0036] Example 1 High concentration refractory organic wastewater pretreatment system

[0037] like figure 1 As shown, this embodiment is a high-concentration refractory organic wastewater pretreatment system, including a carbon particle dosing pool 1, an iron-carbon micro-electrolysis pool 2, a pH adjustment pool 3, a sedimentation pool 4, and nano-TiO 2 Photocatalytic pool5.

[0038] The carbon particle dosing pool 1 is provided with a stirring device 6, which includes a stirring shaft 61 extending into the waste water, a motor 62 that drives the stirring shaft 61 to rotate, and a stirring paddle 63 installed on the stirring shaft 61. The stirring device 6 is used to fully mix the activated carbon particles in the carbon particle dosing pool 1 in the waste water, and then flow into the iron-carbon micro-electrolytic cell 2 .

[0039] Depend on figure 1 It can be seen that baffles 23 are detachably installed in the iron-carbon micro-electrolytic cell 2, and the baffles 23 ...

Embodiment 2

[0047] Embodiment 2 high concentration refractory organic wastewater pretreatment method

[0048] Utilize the pretreatment system of embodiment 1 to carry out pretreatment to the high concentration refractory organic wastewater sample in table 1:

[0049] Table 1 Salinity, COD, and chromaticity indicators in water samples

[0050] substance COD (mg / L) Chroma (times) B / C ratio pH concentration 3.4×10 4 200 0 5.6

[0051] COD in wastewater is mainly provided by phenol (toxic, difficult to be degraded by microorganisms), pretreatment includes the following steps:

[0052] (1) Introduce the wastewater into the carbon particle dosing tank, adjust the pH value of the wastewater to be treated to 3, and add carbon particles to a concentration of 50g / L at the same time, and mix them evenly through the stirring device;

[0053] (2) Introduce the effluent from the carbon particle dosing tank into the first reaction tank. The distance between two adjacent...

Embodiment 3

[0057] Embodiment 3 high-concentration refractory organic wastewater pretreatment method

[0058] Utilize the pretreatment system of embodiment 1 to carry out pretreatment to the high-concentration refractory organic wastewater sample in table 1, pretreatment comprises the following steps:

[0059] (1) Introduce the wastewater into the carbon particle dosing tank, adjust the pH value of the wastewater to be treated to 4, and add carbon particles to a concentration of 30g / L at the same time, and mix them evenly through the stirring device;

[0060] (2) Introduce the effluent from the carbon particle dosing tank into the first reaction tank, the distance between two adjacent baffles in the first reaction tank is 5cm, the pH value is 4, the carbon particle concentration is 30g / L, and the hydraulic retention time for 2h;

[0061] (3) The effluent from the first reaction tank is introduced into the second reaction tank. The distance between two adjacent baffles in the second react...

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Abstract

The invention discloses a pretreatment system and pretreatment method for high-concentration refractory organic wastewater. The pretreatment system comprises a carbon granule dosing tank, an iron-carbon microelectrolysis tank, a pH regulation pool, a precipitation tank and a photocatalysis pool which are sequentially connected along the water flow direction, wherein the iron-carbon microelectrolysis tank comprises a first reaction tank and a second reaction tank which are communicated with each other, baffles made from iron-copper alloy are mounted in each of the first and second reaction tanks, and each of the first and second reaction tanks is provided with a pH control module and a carbon granule concentration control module. The pretreatment method is carried out in the pretreatment system. According to the system and the method, the baffles made from the iron-copper alloy are mounted in the iron-carbon microelectrolysis tank, so that iron chippings are not required to be additionally dosed, copper is mixed with an iron-carbon mixture in the form of copper chippings, and then, the scabbing of iron carbon is effectively prevented; the iron-carbon microelectrolysis tank is divided into the first reaction tank and the second reaction tank which are communicated with each other, and each of the first and second reaction tanks is provided with the pH control module and the carbon granule concentration control module, so that the efficiency of organic substance degradation is increased.

Description

technical field [0001] The invention belongs to the technical field of treatment of high-concentration refractory organic wastewater, and in particular relates to a pretreatment system and a pretreatment method of high-concentration refractory organic wastewater. Background technique [0002] The treatment of high-concentration refractory organic wastewater is a recognized problem in domestic and foreign sewage treatment circles. High-concentration refractory organic wastewater includes: coking wastewater, petrochemical / oil wastewater, textile / printing and dyeing wastewater, chemical wastewater, etc. The so-called "high concentration" refers to the high concentration of organic matter (COD) in this type of wastewater, generally above 2000 mg / L; the so-called "refractory" refers to the low biodegradability of this type of wastewater, BOD 5 The / COD value is generally below 0.3, and it is difficult to directly biodegrade. Therefore, the industry generally regards COD concent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06
Inventor 郑旭晨林莹骆椿明屈立宇李娜沈东升冯华军
Owner 杭州智水水务科技有限公司
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