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Method for treating petroleum drilling high-salinity wastewater by adopting dual ionic membrane electrochemical technique combined with biochemical technique

A membrane electrochemical and biochemical treatment technology, applied in chemical instruments and methods, mining wastewater treatment, biological water/sewage treatment, etc., can solve the problems of lack of treatment technology, long treatment cycle, and difficulty in achieving the purpose of sewage treatment, etc. It achieves the effect of convenient operation, low operating cost and favorable biochemical treatment

Inactive Publication Date: 2017-01-25
江苏金点环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is a lack of treatment technology for oil drilling high-salt wastewater, and the conventional sewage treatment process is difficult to achieve the treatment purpose, and the treatment cycle is long

Method used

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  • Method for treating petroleum drilling high-salinity wastewater by adopting dual ionic membrane electrochemical technique combined with biochemical technique
  • Method for treating petroleum drilling high-salinity wastewater by adopting dual ionic membrane electrochemical technique combined with biochemical technique
  • Method for treating petroleum drilling high-salinity wastewater by adopting dual ionic membrane electrochemical technique combined with biochemical technique

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Experimental program
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Effect test

example

[0035] 1. Connect the DC power supply and inject clean water into the clean water chamber. The wastewater is drilling wastewater from an oil group. The wastewater is acidic and has high salinity, which is difficult to treat by conventional processes. First inject the wastewater into the iron-carbon micro-electrolysis device for 2 hours, take it out and add flocculant, after sedimentation, take the supernatant and inject it into the sewage chamber, turn on the power supply and adjust the voltage to 15V, and the current at this time is 1.4A. After 60 minutes of treatment, the test results are shown in Table 1 below.

[0036] Table 1

[0037] dest_path_image002a

[0038] The salt content of the effluent is greater than 4000mg / L, and the biochemical effect is poor.

[0039] 2. Connect the DC power supply and inject clean water into the clean water chamber. The wastewater is drilling wastewater from an oil group. The wastewater is acidic and has high salinity, which is diffic...

Embodiment 3

[0044] table 3

[0045] dest_path_image006

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Abstract

The invention discloses a method for treating petroleum drilling high-salinity wastewater by adopting dual ionic membrane electrochemical technique combined with biochemical technique. The method comprises the following steps: (1) switching on direct current, and applying a driving force to ions in water; (2) using the dual ionic membranes in opposite polarities, and enabling the ions to move directionally, wherein positive ions in wastewater move towards a cathode and negative ions move towards an anode, thereby reducing salinity; (3) degrading an organic matter by a strong-oxidizing matter generated through electrochemistry treatment; (4) further reducing micromolecular organic matters in the wastewater by a biochemistry treatment system. The method disclosed by the invention is economical and has high efficiency, secondary pollution is avoided, the purposes of rapidly desalting and degrading the organic matter are achieved, and the treatment reaches the standard.

Description

technical field [0001] The invention relates to the environmental protection industry, in particular to a method for treating high-salt wastewater from petroleum drilling by using dual-ion membrane electrochemical combined with biochemistry. Background technique [0002] Drilling wastewater is a mixture of highly diluted drilling fluid and oil. It has the characteristics of good stability, high chemical oxygen demand, and refractory degradation. Drilling wastewater is usually considered as diluted mud. There are many kinds of mud treatment agents, from more than 20 kinds in the past to more than 200 kinds today, usually including weighting agents. Water loss reducer, viscosifier, diluent and stabilizer, jam release agent, drag reducer, pH regulator, formation damage prevention chemical and scale inhibitor, etc. The types and quantities of treatment agents used vary according to geological and formation conditions. Generally speaking, the deeper the well and the higher the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/10
CPCC02F9/00C02F1/48C02F3/1268C02F3/34C02F2001/007C02F2001/422C02F2103/10C02F2301/08
Inventor 周伟强吴伟平周莹吴旭李诚成李亮亮居朝乐
Owner 江苏金点环保科技有限公司
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