A clean and thorough treatment of tungsten and molybdenum organic mixed wastewater synchronous metal recovery and hydrogen by-product method
A mixed wastewater, tungsten and molybdenum technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of effluent quality discharge, low metal concentration, etc., to achieve both environmental protection and eco-efficiency
Inactive Publication Date: 2020-01-17
DALIAN UNIV OF TECH
View PDF22 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although there are also a small number of reports of single-chamber MECs processing metal-organic mixtures (Abourached et al., WaterRes 2014, 51:228-233; Wu et al., Bioresour Technol 2018, 253:372-377; CN106757117, etc.), but the processing The metal concentration is relatively low (such as 12.5mg / L Cu(II), 22.4mg / L Cd(II) or 26mg / L Zn(II)); and limited to the mixture of organic matter and a single metal
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0031] Step 1: Construct and assemble single-chamber cylindrical MECs, such as figure 1 Shown: The cylindrical MECs are made of plexiglass and wrapped with a layer of tin foil to avoid light. Among them, the outer diameter is 34.0cm, the height is 45.0cm, and the total volume is 40.8L. The reactor is equipped with a headspace with an inner diameter of 18.0cm, a height of 2.0cm, and a volume of 0.5L; an air collecting bag with a maximum volume of 1.0L is installed in the headspace; There is an outlet pipe with an inner diameter of 1.0cm. The anode carbon felt is 69.2cm×40cm×1cm, and the cathode carbon felt is 56.6cm×40cm×1cm. The carbon felt is soaked in 1.0M NaOH and 1.0M HCl solution for 24 hours to remove surface impurities, and then washed with deionized water and soaked until water It is neutral; the size of the anode conductive stainless steel mesh (304, 14 mesh) is 69.2cm×40cm, and the size of the cathode stainless steel mesh is 56.6cm×40cm. The installed MECs have an...
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
| Property | Measurement | Unit |
|---|---|---|
| electrical conductivity | aaaaa | aaaaa |
| clearance rate | aaaaa | aaaaa |
Login to View More
Abstract
The invention belongs to the technical field of waste water treatment, and discloses a method for treating tungsten-molybdenum organic mixed waste water cleanly and thoroughly and recycling metal anda hydrogen gas byproduct synchronously. A cylindrical microbial electrolytic cell composed of an anode and a cathode is adopted; the anode and the cathode are both made of carbon-based materials suchas carbon felts and carbon fibers; the anode and the cathode are isolated by a stainless steel mesh, and the stainless steel mesh serves as an electronic output / input part; a solution in a reactor isa metal organic mixed solution composed of tungsten, molybdenum and organic matters, the concentration is 1-2,500 mg / L, the pH is 3.0-8.0, and the electric conductivity is 0.3-3 mS / cm; and the anode and the cathode are connected with a data collecting system and an external power supply through external resistors, and the external resistance value is 10-1,000 ohm. According to the novel method forremoving the tungsten-molybdenum organic waste water cleanly and thoroughly and recycling the hydrogen gas byproduct synchronously, the whole process is clean and environmentally friendly.
Description
technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for thoroughly treating tungsten, molybdenum and organic mixed wastewater by using a microbial electrolytic cell to simultaneously recover valuable metals and produce hydrogen by-product. Background technique [0002] Tungsten and molybdenum are rare metals widely used in chemical industry, metallurgy, materials and other fields. During the mining, smelting, product preparation and use of tungsten-molybdenum associated mines, mixed wastewater containing tungsten, molybdenum and organic matter will be generated, which not only brings risks and hidden dangers to the environment and ecology, but also causes a waste of resources. On the other hand, mining tungsten and molybdenum from mines will not only lead to the depletion of tungsten and molybdenum resources, but also consume much more energy than recycling waste products. Therefore, the recovery...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/00C25B1/04C02F3/00
CPCC02F3/005C25B1/00C25B1/04Y02E60/36
Inventor 黄丽萍单利媛潘玉珍全燮
Owner DALIAN UNIV OF TECH