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Method for treating acidic sewage containing heavy metals and co-producing new energy

A technology for acid sewage and heavy metals, which is applied in water/sewage treatment, biological water/sewage treatment, water/sewage treatment equipment and other directions, can solve the problem of reduced hydrogen production performance, and achieve low cost, simple steps and obvious treatment effects. Effect

Inactive Publication Date: 2019-11-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of these problems, the present invention provides a high-efficiency, low-cost method for the co-production of new energy in the treatment of acidic sewage containing heavy metals, which adopts the method of combining electrochemistry and related special microorganisms. Since the acidic sewage containing heavy metals contains high concentrations of conductive ions and hydrogen Ions, using this feature to solve the problem of degraded hydrogen production performance due to the consumption of protons while producing hydrogen, and recover heavy metals and hydrogen at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Collect the bacterial suspension in the microbial primary battery reactor cultured by sodium acetate, and mix the bacterial suspension with the nutrient solution at a volume ratio of 1:5 to prepare the anode chamber electrolyte, which contains 3g / L acetic acid Sodium, 100mL / L phosphate buffer solution (50mM, pH=7), 0.3g / L ammonium chloride, 0.1g / L potassium chloride, 0.2g / L sodium chloride, 0.25g / L ferric sulfate, 0.4g / L manganese sulfate, 0.01g / L copper sulfate aqueous solution;

[0020] The bacterial suspension comes from a microbial primary battery reactor in which acetate is a culture solution. The reactor is divided into an anode chamber and a cathode chamber by a proton exchange membrane, and the anode and the cathode are respectively placed in the anode chamber and the cathode chamber. Activated sludge and nutrient solution (containing 3g / L sodium acetate, 0.3g / L ammonium chloride, 0.1g / L potassium chloride, 0.2g / L sodium chloride, 0.25g / L iron sulfate, 0....

Embodiment 2

[0024] (1) Collect the bacterial suspension in the microbial primary battery reactor cultured by sodium acetate, and mix the bacterial suspension with the nutrient solution at a volume ratio of 1:15 to prepare the anode chamber electrolyte. The nutrient solution contains 4g / L acetic acid Sodium 70mL / L phosphate buffer solution (50mM, pH=7), 0.4g / L ammonium chloride, 0.2g / L potassium chloride, 0.3g / L sodium chloride, 0.1g / L ferric sulfate, 0.5g / The aqueous solution of L manganese sulfate, 0.02g / L copper sulfate;

[0025] The bacterial suspension comes from a microbial primary battery reactor in which acetate is a culture solution. The reactor is divided into an anode chamber and a cathode chamber by a proton exchange membrane, and the anode and the cathode are respectively placed in the anode chamber and the cathode chamber. Activated sludge and nutrient solution (containing 4g / L sodium acetate, 0.4g / L ammonium chloride, 0.2g / L potassium chloride, 0.3g / L sodium chloride, 0.1...

Embodiment 3

[0029] (1) Collect the bacterial suspension in the microbial primary battery reactor cultured by sodium acetate, and mix the bacterial suspension (same source as in Example 1) with the nutrient solution at a ratio of 1:15 by volume to prepare the anode chamber electrolyte. The solution is 50mL / L phosphate buffer solution containing 5g / L sodium acetate (50mM, pH=7), 0.35g / L ammonium chloride, 0.15g / L potassium chloride, 0.4g / L sodium chloride, 0.25g / L Aqueous solution of L ferric sulfate, 0.7g / L manganese sulfate, 0.03g / L copper sulfate;

[0030] (2) Use a bipolar membrane (Zhejiang Lanji Membrane Technology Co., Ltd.) to divide the reactor into an anode chamber and a cathode chamber. The anode and cathode are respectively placed in the anode chamber and the cathode chamber. The cathodic chamber uses 50mM, pH=7 phosphate buffer solution as the electrolyte, and the reactor is powered on, and the electrolyte in the anode chamber and the cathode chamber is replaced once a day. Whe...

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Abstract

The invention discloses a method for treating acidic sewage containing heavy metals and co-producing new energy. The method comprises the following steps: dividing a reactor into an anode chamber anda cathode chamber by adopting a bipolar membrane, wherein an anode and a cathode are respectively placed in the anode chamber and the cathode chamber, a mixture of a bacterial suspension and a nutrient solution is used as an electrolyte in the anode chamber, and a phosphate buffer solution is used as an electrolyte in the cathode chamber; powering up a reactor to operate, replacing the electrolyteperiodically, and when the anode potential is stabilized at 0.24 V or above for three times, anode pretreatment is completed; replacing the electrolyte in the anode chamber of the reactor with high-concentration organic sewage, replacing the electrolyte in the cathode chamber with heavy metal-containing acidic sewage, carrying out anaerobic treatment on the heavy metal-containing acidic sewage under the conditions of nitrogen and applied voltage, and recovering hydrogen; the method has the characteristics of low cost, high efficiency, strong universality, good treatment effect and the like, secondary pollution in the heavy metal-containing acidic sewage treatment process is effectively reduced, resource utilization of wastes is realized, and meanwhile, corresponding economic benefits areobtained.

Description

technical field [0001] The invention relates to a technology for treating acidic heavy metal sewage, in particular to a method for using an electrochemical method to treat and degrade organic sewage while co-producing new energy. Background technique [0002] my country is the third largest mining country in the world. It has abundant metal mine resources. Mining mining has made an important contribution to economic development. However, mining mining produces a large amount of acidic wastewater containing heavy metal ions, which causes huge pollution to the environment. Such wastewater If it is discharged directly without treatment, the water body will be acidified. At the same time, because the acidic wastewater also contains a large amount of heavy metal ions such as copper, nickel, mercury, cadmium, lead, chromium, etc., which cannot be degraded after discharge, once the water body, soil and organisms are exposed to them The pollution is difficult to remove, and through bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/34C02F101/30C02F101/20
CPCC02F3/005C02F3/34C02F2101/20C02F2101/30C02F2305/06C02F2201/46135
Inventor 瞿广飞邓继加赵驰李军燕杨聪庆宁平
Owner KUNMING UNIV OF SCI & TECH
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