A rapid start-up method for a bioelectrochemical process for deoxygenation of oilfield wastewater

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

Active Publication Date: 2021-07-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A rapid start-up method for a bioelectrochemical process for deoxygenation of oilfield wastewater
  • A rapid start-up method for a bioelectrochemical process for deoxygenation of oilfield wastewater
  • A rapid start-up method for a bioelectrochemical process for deoxygenation of oilfield wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Reactor effective volume 1.8L, high diameter ratio of 15: 1.

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

[0032] Acetate concentration of 1.0 g / l; 1 ml / L of vitamin liquid and 1 ml / L of trace element solution, 50 mM phosphate buffer solution (pH 7.0): Phosphate buffered solution main component concentration: 11.55 g / L twelve hydrogen phosphate 2 Sodium, 2.77 g / L dihydrate, 0.31 g / L ammonium chloride, 0.13 g / L, potassium chloride; vitamin liquid main component concentration: vitamin H, 0.2 g / l, folic acid, 0.2g / L, Vitamin B6, 1g / L, Riboprin, 0.5g / L, Vitamin B1, 0.5g / L, Niacin, 0.5g / L, Pantotheno Acid, 0.5g / L, B-12, 0.01g / L, P- Aminobenzoic acid, 0.5 g / l, sulfic acid, 0.5 g / L.

[0033] The main component concentration of trace elements 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 O 0.01g / L, Alk (SO 4...

Embodiment 2

[0044] (1) Reactor effective volume 1.8L, high diameter ratio of 15: 1.

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

[0046] Acetate concentration of 1.2 g / L; 1 ml / L of vitamin liquid and 1.5 ml / L of trace element solution (pH 7.0): Phosphate buffered solution main component concentration: 12.3 g / L twelve hydrogen phosphate Disodium, 2.95 g / l Dihydrate sodium dihydrogen, 0.5 g / L ammonium chloride, potassium chloride, potassium chloride; vitamin liquid main ingredient concentration vitamin H, 0.3 g / l, folic acid, 0.3g / L, Vitamin B6, 1.2g / L, riboflavin, 0.6 g / l, vitamin B1, 0.6g / L, niacin, 0.6 g / l, pantothenic acid, 0.6 g / l, b-12, 0.03 g / l, p - Aminobenzoic acid, 0.6 g / L, sulfuric acid, 0.6 g / L.

[0047] The main component concentration of trace element fluid 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 / L, CUSO 4 · 5h 2 O 0....

Embodiment 3

[0057] The startup effect test of Example 2:

[0058] (1) such as figure 2 As shown, the current is fluctuating when the current starts in the water, then steadily, in the second day inlet water dissolved from 2 mg / L to 4 mg / L, the current fluctuates, then smooth, and stable, improved, from The next day, it began to rapidly, on day 6, the maximum, 6.4mA, and then started steady, from day 5, the current was basically maintained at 6mA.

[0059] (2) image 3 It can be seen that the two anode potentials have decreased rapidly during the startup period, and the starting period is from 0 mV (VS AG / AGCL), respectively.

[0060] (3) according to Figure 4 It can be seen that after the start is stable, the water concentration of water is 1000 mg / L, the water is about 600 mg / L, and the removal rate is 40%. After testing, the anode Kurlen efficiency was 4% after stable operation.

[0061] (4) See Figure 5-6 In the start of the domestication stage, the anode potential continued to ma...

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Abstract

The invention discloses a quick start-up method for a bioelectrochemical process for deoxygenation of oilfield wastewater. By controlling the culture medium ratio, inoculation source, line connection, DO control and other conditions during the start-up period, effective quick enrichment and high efficiency can be realized. Electrogenic microorganisms can achieve rapid start-up of bioelectrochemical reactors. The control conditions adjust the starting substrate to be the most suitable substrate for common dominant anode microorganisms. At the same time, the use of activated sludge improves the biodiversity of the inoculum, and the control line connection forms a high-pressure screening of functional microorganisms. The control of DO is very good. It matches the demand for oxygen of the facultative microorganisms in the target functional microorganisms, and balances the demand for oxygen of the cathode.

Description

Technical field [0001] The present invention belongs to the technical field of microbial prevention and treatment of oxygen electrochemical etching, and it is related to a rapid starting method of biochemical dehydrate processes. Background technique [0002] In-injection water contains dissolved oxygen on the water injection pipe equipment and the casing can cause severe corrosion, based on the need to impair oxygen in the oil field, therefore designed and developed new biohemyniminated oxygen reactors, for the reactor, main The working core is the production electromonomer that can be enriched on the anode. From 1910, the microorganism (E. coli, E.COLI.) Can oxidize the yeast on the electrode and start the current output, since the electronic transmission efficiency is very low, After a few more time, there is no interest in people's interest in microbial extracellular electronic transmission research, until the electrochemical ability of microbes in the 1960s is mentioned and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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