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Rapid starting method of biological electrochemistry technology for removing oxygen from oil field wastewater

A technology of bioelectrochemistry and oilfield wastewater, which is applied in chemical instruments and methods, electrochemical and biological combined treatment, mining wastewater treatment, etc., can solve the problems of low power generation capacity of MFC operation, reduce oxygen corrosion, improve water quality, The effect of enhancing biodiversity

Active Publication Date: 2019-01-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, Pseudomonas aeruginosa is a functional bacterium with the ability of extracellular electron transfer, but the ability of MFC to generate electricity is very low

Method used

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  • Rapid starting method of biological electrochemistry technology for removing oxygen from oil field wastewater
  • Rapid starting method of biological electrochemistry technology for removing oxygen from oil field wastewater
  • Rapid starting method of biological electrochemistry technology for removing oxygen from oil field wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) The effective volume of the reactor is 1.8L, and the aspect ratio is 15:1.

[0031] (2) The water intake formula is as follows:

[0032] Acetate concentration 1.0g / L; 1ml / L vitamin solution and 1ml / L trace element solution, 50mM phosphate buffer solution (pH 7.0): concentration of main components of phosphate buffer solution: 11.55g / L dihydrogen phosphate dodecahydrate Sodium, 2.77g / L sodium dihydrogen phosphate dihydrate, 0.31g / L ammonium chloride, 0.13g / L potassium chloride; concentration of main components of vitamin solution: vitamin H, 0.2g / L, folic acid, 0.2g / L, Vitamin B6, 1g / L, Riboflavin, 0.5g / L, Vitamin B1, 0.5g / L, Niacin, 0.5g / L, Pantothenic Acid, 0.5g / L, B-12, 0.01g / L, P- Aminobenzoic acid, 0.5g / L, lipoic acid, 0.5g / L.

[0033] The main component concentration of trace element solution is: MgSO 4 3g / L, MnSO 4 ·H 2 O 0.5g / L, NaCl 1g / L, FeSO 4 ·7H 2 O 0.1g / L, CaCl 2 2H 2 O 0.1g / L, CoCl 2 ·6H 2 O 0.1g / L, ZnCl 2

[0034] 0.13g / L, CuSO 4 ·5H 2...

Embodiment 2

[0044] (1) The effective volume of the reactor is 1.8L, and the aspect ratio is 15:1.

[0045] (2) The water intake formula is as follows:

[0046] Acetate concentration 1.2g / L; 1ml / L vitamin solution and 1.5ml / L trace element solution, 60mM phosphate buffer solution (pH 7.0): concentration of main components of phosphate buffer solution: 12.3g / L hydrogen phosphate dodecahydrate Disodium, 2.95g / L sodium dihydrogen phosphate dihydrate, 0.5g / L ammonium chloride, 0.25g / L potassium chloride; main component concentration of vitamin solution vitamin H, 0.3g / L, folic acid, 0.3g / L, Vitamin B6, 1.2g / L, riboflavin, 0.6g / L, vitamin B1, 0.6g / L, niacin, 0.6g / L, pantothenic acid, 0.6g / L, B-12, 0.03g / L, P -Aminobenzoic acid, 0.6g / L, lipoic acid, 0.6g / L.

[0047] The concentration of the main components of the trace element solution includes MgSO 4 3.5g / L, MnSO 4 ·H 2 O 0.6g / L, NaCl

[0048] 1.2g / L, FeSO 4 ·7H 2 O 0.2g / L, CaCl 2 2H 2 O 0.2g / L, CoCl 2 ·6H 2 O 0.2g / L, ZnCl 2 0.25g...

Embodiment 3

[0057] For the starting effect test of embodiment 2:

[0058] (1) if figure 2 As shown, the current fluctuated at the beginning of the water intake, and then stabilized. When the dissolved oxygen in the water increased from 2mg / L to 4mg / L on the second day, the current fluctuated, then stabilized, and increased steadily, and the increase was relatively slow. It began to increase rapidly on the second day, reached the maximum at 6.4mA on the sixth day, and then began to stabilize. After the fifth day, the current basically maintained at the level of 6mA.

[0059] (2) by image 3 It can be seen that the two anode potentials drop rapidly during the start-up period, from 0mV to -0.5mV (vs Ag / AgCl) respectively during the start-up period.

[0060] (3) According to Figure 4 It can be seen that after the startup is stable, the COD concentration of the influent water is 1000mg / L, the effluent water is about 600mg / L, and the removal rate is 40%. After testing, the anode coulombic...

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Abstract

The invention discloses a rapid starting method of a biological electrochemistry technology for removing oxygen from oil field wastewater. The method can realize effective rapid enrichment of electrogenesis microbes by controlling the culture medium ratio, inoculation sources, line connection, DO control and other conditions, and can realize the rapid starting of a bioelectrochemical reactor. A substrate for adjusting and starting the control conditions is the most applicable substrate for common dominant anode microbes, and meanwhile, activated sludge is adopted to improve the biological diversity of inoculums, the line connection is controlled to form high-voltage screening to functional microbes, the DO control properly matches with the demand on oxygen by facultative microbes in targetfunctional microbes, and meanwhile, the demand on oxygen by a cathode is balanced.

Description

technical field [0001] The invention belongs to the technical field of microbial prevention and control of oxygen electrochemical corrosion, and relates to a quick start method of a bioelectrochemical oxygen removal process. Background technique [0002] Dissolved oxygen in the injected water will cause serious corrosion to the water injection pipeline equipment and casing. Based on the necessity of deoxidizing the injected water in the oil field, a new type of bioelectrochemical oxygen removal reactor is designed and developed. For this reactor, the main The core of the work is the electricity-producing microorganisms that can be enriched on the anode. Since the earliest discovery in 1910 that microorganisms (Escherichia coli, E.coli.) can oxidize yeast on the electrode and obtain current output, due to the very low efficiency of electron transfer, in After quite a long period of time, it did not arouse people's interest in the study of microbial extracellular electron tran...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/34C02F103/10
CPCC02F3/005C02F3/34C02F2103/10
Inventor 吴伟林杨帆林晶晶孟章进袁玉峰李兴
Owner CHINA PETROLEUM & CHEM CORP
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