Method for treating high-salt wastewater and recycling nutritive salt through microbial desalination cell

A technology for microbial desalination and high-salt wastewater, applied in the field of environmental pollution biological treatment, can solve the problems of inability to adapt to treatment, high power consumption for operation, low environmental benefits, etc., and achieve the effects of efficient recovery, improved degradation, and improved power generation performance.

Active Publication Date: 2020-01-17
CHONGQING UNIV
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a wide range of applications and can remove a variety of pollutants deeply and efficiently, but its operation consumes a lot of power
(2) Incineration method: the high-salt nitrogen-containing wastewater is vaporized under high temperature conditions, organic matter, etc. are oxidized by oxygen, while other salt substances crystallize and precipitate, but this method is prone to produce toxic and harmful substances during incineration, and the equipment is seriously corroded
This technical scheme does not recover the nutrient salts in the wastewater, and at the same time, the cathode chamber uses potassium ferricyanide solution, which is directly discharged without treatment, and the environmental benefits are low
In addition, this technical solution cannot adapt to the treatment of wastewater with different high salinity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for treating high-salt wastewater and recycling nutritive salt through microbial desalination cell
  • Method for treating high-salt wastewater and recycling nutritive salt through microbial desalination cell
  • Method for treating high-salt wastewater and recycling nutritive salt through microbial desalination cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Using the microbial desalination battery of the present invention to treat high-salt wastewater and recover nutrient salts comprises the following steps:

[0030] Step 1. Domestication of the anode microbial community

[0031] Under high-salt and high-ammonium conditions (NaCl concentration 58-62g / L, NH 4 + At a concentration of 0.3-0.9g / L), the anode microorganisms of the microbial desalination battery are domesticated. After the output voltage of the desalination battery is stable, the microbial community successfully domesticated under this condition is obtained. The microbial community has nitrifying and denitrifying functional bacteria, which can It effectively promotes the removal of ammonium and the degradation of organic matter, and at the same time has a specific bacterial group that reduces nitrate, which can significantly improve the recovery of ammonium.

[0032] Step 2. Assembly of microbial desalination battery

[0033]The reactor is columnar, and there...

Embodiment 2

[0042] Using the microbial desalination battery of the present invention to treat high-salt wastewater and recover nutrient salts comprises the following steps:

[0043] Step 1. Domestication of the anode microbial community

[0044] Under the condition of high salt and high ammonium (NaCl concentration 58~62g / L, NH 4 + Concentration of 0.3~0.9g / L) to domesticate the anode microorganisms of the microbial desalination battery. After the output voltage of the desalination battery is stable, the microbial community successfully domesticated under this condition is obtained. The microbial community has nitrifying and denitrifying functional bacteria, which can effectively Promote the removal of ammonium and the degradation of organic matter, and at the same time have a specific bacterial population that reduces nitrate, which can significantly improve the recovery of ammonium.

[0045] Step 2. Assembly of microbial desalination battery

[0046] The reactor is columnar, and ther...

Embodiment 3

[0055] Using the microbial desalination battery of the present invention to treat high-salt wastewater and recover nutrient salts comprises the following steps:

[0056] Step 1. Domestication of the anode microbial community

[0057] Under high-salt and high-ammonium conditions (NaCl concentration 58-62g / L, NH 4 + At a concentration of 0.3-0.9g / L), the anode microorganisms of the microbial desalination battery are domesticated. After the output voltage of the desalination battery is stable, the microbial community successfully domesticated under this condition is obtained. The microbial community has nitrifying and denitrifying functional bacteria, which can It effectively promotes the removal of ammonium and the degradation of organic matter, and at the same time has a specific bacterial group that reduces nitrate, which can significantly improve the recovery of ammonium.

[0058] Step 2. Assembly of microbial desalination battery

[0059] The reactor is columnar, and ther...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for treating high-salt wastewater and recycling nutritive salt through a microbial desalination cell. The method comprises the steps of (1) acclimating an anodic microbe under the conditions with high salinity and high ammonium; (2) sequentially assembling a cathode chamber, a recycle chamber and an anode chamber to form a microbial desalination cell, separating the cathode chamber and the recycle chamber through an anion-exchange membrane, separating the anode chamber and the recycle chamber through a cation-exchange membrane, and adopting a carbon brush and an air cathode as an anode material and a cathode material; and (3) inoculating the acclimated anodic microbe to the carbon brush, adopting the high-salt wastewater as an anode chamber water intake matrix, operating the desalination cell by adopting an intermittent water intake and cathode-anode fluid circulation type operation mode, and collecting the nutritive salt through the recycle chamber. According to the method provided by the invention, the degradation of complex organic matters is remarkably promoted, the organic matter removal rate can reach to more than 90 percent along with the increase of ammonium concentration, part of nutritive salt is recycled, the wastewater treatment cost is effectively reduced, and the method is economic and environmental-friendly.

Description

technical field [0001] The invention relates to the technical field of biological treatment of environmental pollution, in particular to a method for treating high-salt wastewater and recovering nutrient salts by a microbial desalination battery. Background technique [0002] High-salt wastewater comes from domestic sewage and industrial wastewater, and contains high levels of inorganic ions (such as Ca 2+ , Na + , SO 4 2- , Cl - , NH 4 + and PO 4 3- etc.), whose total salt content exceeds one percent of the wastewater, and may contain a variety of heavy metal ions, which is a typical highly polluted and difficult-to-treat wastewater. If the high-salt wastewater is discharged directly without treatment, its high concentration of inorganic ions will lead to an increase in the salinity of rivers and lakes, nitrogen, phosphorus, organic matter, etc. will cause eutrophication of the water body, and heavy metal ions will cause biological toxicity. Serious pollution to th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/34C02F101/30C02F101/10C02F101/12C02F101/16
CPCC02F3/005C02F3/34C02F2101/10C02F2101/12C02F2101/16C02F2101/30C02F2209/08C02F2305/06
Inventor 张代钧吴姗姗张凯黄永葵杨芳芳
Owner CHONGQING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap