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Equipment and combined process for treating RO concentrated solution of high-concentration organic wastewater

A technology of organic wastewater and combined process, which is applied in the field of water pollution treatment, can solve the problems of complex pollutant components, difficult treatment, and energy consumption reduction, and achieve the effects of reducing electrolysis efficiency, reducing electrolysis time, and reducing electrolysis energy consumption

Active Publication Date: 2015-04-22
中钢集团武汉安全环保研究院有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a set of equipment and a combined process for the problems of high salt content, complex pollutant components, and difficult treatment of high-concentration organic wastewater RO concentrated liquid. 3 o 4 Synergistic pulse electrolysis treatment of high-concentration organic wastewater RO concentrate treatment process is further optimized to remove COD and NH in high-concentration organic wastewater RO concentrate 3 -N, chromaticity, etc., so that the pollutants can be effectively degraded, the effluent water quality can reach the discharge standard, and the energy consumption can be greatly reduced

Method used

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  • Equipment and combined process for treating RO concentrated solution of high-concentration organic wastewater
  • Equipment and combined process for treating RO concentrated solution of high-concentration organic wastewater
  • Equipment and combined process for treating RO concentrated solution of high-concentration organic wastewater

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example 1

[0059] Example 1: Take the RO concentrate of the leachate treatment project of a domestic waste landfill plant in a certain place in central China as an example. The leachate treatment water volume of this project is 150m 3 / d, yields about 50 m 3 Concentrate of / d.

[0060] Use the process inlet and outlet water parameter table of the present invention:

[0061]

[0062] The above process flow is: Fenton pretreatment tank 1 initial water temperature 15°C, reaction time 60min; membrane system separation equipment 5 working time 35min, inlet pressure 0.095Mpa, outlet pressure 0.025Mpa, flow rate 18L / min, effluent flow rate 90L / h: m 2 ; The pulse electrolysis time in the pulse electrolysis cell 7 is 25min, the voltage is 15V, and the current density is 8 mA / ㎝ 2 , the frequency is 4K~5KHZ, the water temperature rises from 15°C to 38°C; the magnetic sedimentation tank 10 includes electromagnetic suction sedimentation, mud discharge, and drainage time for 15 minutes, an...

example 2

[0070] Example 2 Taking the RO concentrate of a coking plant in central China as an example, the water volume of RO concentrate is 80m per day 3 .

[0071] Use the process inlet and outlet water parameter table of the present invention:

[0072]

[0073] The above process flow is: Fenton pretreatment tank 1 water temperature 15°C, reaction time 60min; membrane system separation equipment 5 working time 35min, inlet pressure 0.095Mpa, outlet pressure 0.025Mpa, flow rate 18L / min, effluent flow rate 110L / h.m 2 ; The pulse electrolysis time in the pulse electrolysis cell 7 is 37min, the voltage is 15V, and the current density is 8 mA / ㎝ 2 , the frequency is 4K~5KHZ, the water temperature rises from 15°C to 37°C; the magnetic sedimentation tank 10 includes electromagnetic suction sedimentation, mud discharge, and drainage time for 15 minutes, and the external coil operating voltage is 20V.

[0074] In the above process flow, one Fenton pretreatment pool is installed, with an ef...

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Abstract

The invention relates to equipment and a combined process for removing RO concentrated solution in a high-concentration organic wastewater treatment system. The equipment for treating RO concentrated solution of high-concentration organic wastewater comprises a Fenton pretreatment pool 1, membrane system separation equipment 5, a pulsed electrolytic cell 7 and a magnetic settling pond 10 which are sequentially connected by virtue of pipelines, wherein the membrane system separation equipment 5 refers to a tubular coating; the pulsed electrolytic cell 7 is an inverted I-shaped electrolytic cell which consists of two pools 26 and two water tanks 27 and is hollow; and magnets 11 consisting of soft iron and wound coils are arranged on the outer layer of the settling pond wall 28 in a sectional mode. The combined process for treating the RO concentrated solution of high-concentration organic wastewater comprises the following steps: performing chemical Fenton pretreatment; performing membrane separation; forming the pulsed electrolytic cell 7 with the Fe3O4 synergistic effect; forming the magnetic settling pond 10; and performing up-to-standard release on the supernatant. According to the novel equipment and combined process provided by the invention, the equipment is feasible in technology and applicable in economy, and the RO concentrated solution of the high-concentration organic wastewater is efficiently treated.

Description

technical field [0001] The invention relates to the technical field of water pollution treatment, in particular to equipment and a combination process for removing pollutants such as pigments, ammonia nitrogen, and COD in RO concentrated liquid of a high-concentration organic wastewater treatment system. Background technique [0002] In recent years, membrane technologies such as ultrafiltration, nanofiltration, and reverse osmosis have gained important applications in wastewater treatment or reuse in municipal sewage, landfills, electroplating, printing and dyeing, steel industry, chemical industry, food, and pharmaceutical industries. For example, when reverse osmosis technology obtains 70% to 80% qualified reclaimed water, it also produces about 30% of the concentrated solution. For example, the landfill leachate concentrate, one of the high-concentration organic wastewater RO concentrates, has highly concentrated pollutants and high salt content (of which CL - 2400~280...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12
Inventor 王服群李凯原张智良李闪冯维力刘芳佞熊昌贵李徐立郑佶
Owner 中钢集团武汉安全环保研究院有限公司
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