Unlock instant, AI-driven research and patent intelligence for your innovation.

A microbial treatment method for uranium-contaminated water that can effectively resist re-oxidation of u(iv)

A technology for microbial treatment and uranium pollution, which is applied in the field of uranium-contaminated water treatment, low-level uranium-containing wastewater and uranium-contaminated groundwater. Satisfies the effect of long-term stable operation, fast processing speed, and reduced reaction conditions

Active Publication Date: 2021-11-30
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is: the initial reaction conditions of the existing anaerobic granular sludge removal method need to be anaerobic or anoxic environment (dissolved oxygen content 2 When other oxidizing substances are used, the precipitation of monomer U(IV) will be easily reoxidized to soluble U(VI), which is not conducive to the long-term stable operation of the system. It provides a uranium pollution that can effectively resist U(IV) reoxidation Water microbial treatment method

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
  • A microbial treatment method for uranium-contaminated water that can effectively resist re-oxidation of u(iv)
  • A microbial treatment method for uranium-contaminated water that can effectively resist re-oxidation of u(iv)
  • A microbial treatment method for uranium-contaminated water that can effectively resist re-oxidation of u(iv)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The simulated uranium-containing wastewater contains various major and trace elements. After passing it through a 0.45 μm (pore size) filter membrane, UO is added to the filtrate 2 SO 4 To U(VI) =10 mg / L, adjust pH=7, and add NaHCO 3 to 1 g / L, the initial dissolved oxygen = 8.99 mg / L, and the simulated uranium-containing wastewater in an oxidizing environment was obtained.

[0047] Add anaerobic granular sludge (starch wastewater cultivation, particle size 1-2 mm) to 3 g VSS / L, and glycerol phosphate to 30 mmol / L to the simulated uranium-containing wastewater in the aforementioned oxidative environment to obtain a reaction mixture liquid. Place the obtained reaction mixture in an anaerobic reaction device (the volume ratio of the reaction mixture in the anaerobic reaction device is 50-60%), seal it, do not need to fill with nitrogen, and the reaction temperature is 25 o C, the stirring speed was 300 rpm, and the reaction was carried out for 14 days. It has been dete...

Embodiment 2

[0050] The simulated uranium-containing wastewater contains various major and trace elements. After the solution passes through a 0.45 μm filter membrane, UO is added to the filtrate 2 SO 4 To U(VI) =10 mg / L, adjust pH=7, add NaHCO 3 to 1 g / L, initial dissolved oxygen = 9.03 mg / L, and uranium-containing wastewater to be treated is obtained.

[0051] Add anaerobic granular sludge (starch wastewater culture, particle size 1-2 mm) to 3 gVSS / L, and add glycerophosphate to 50 mM to the aforementioned wastewater containing uranium to obtain a reaction mixture. The resulting reaction mixture is placed in an anaerobic reaction device, sealed, without nitrogen, and the reaction temperature is 25 o C, the stirring speed was 300 rpm, and the reaction was carried out for 14 days.

[0052] It has been determined that the removal rate of U(VI) in water in this embodiment is 95.3%.

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 microbial treatment method for uranium-contaminated water that can effectively resist U(IV) reoxidation, belongs to the field of uranium-contaminated water treatment, and aims to solve the problem that the initial reaction condition of the existing anaerobic granular sludge removal method needs to be anaerobic or anoxic environment (dissolved oxygen content <0.3 mg / L), harsh reaction conditions, and high levels of nitrate, O 2 When other oxidizing substances are used, the precipitation of monomer U(IV) will be easily re-oxidized to soluble U(VI), which is not conducive to the long-term stable operation of the system. It includes the following steps: (1) adding anaerobic granular sludge and glycerol phosphate to uranium-containing wastewater to obtain a reaction mixture; (2) placing the reaction mixture prepared in step (1) in an anaerobic reaction device , and then seal the anaerobic reaction device, without filling the anaerobic reaction device with nitrogen; after the anaerobic reaction device is sealed, the reaction mixture in the anaerobic reaction device is stirred and reacted at normal temperature until the uranium in the uranium-containing wastewater The removal rate reaches the set value.

Description

technical field [0001] The invention relates to the field of uranium-contaminated water treatment, in particular to the technical field of microbial treatment of low-level uranium-containing wastewater and uranium-contaminated groundwater, in particular to a microbial treatment method for uranium-contaminated water that can effectively resist U(IV) reoxidation. More specifically, the present application relates to a microbial treatment method for uranium-contaminated water, which can realize long-term stable operation of an anaerobic granular sludge uranium removal system, and is of great significance for the treatment of uranium-containing radioactive wastewater. Background technique [0002] Uranium processing enterprises, nuclear power plants, etc. can produce a large amount of low-concentration uranium-containing radioactive wastewater; at the same time, uranium mining and metallurgy, uranium tailings, etc. will cause uranium radioactive contamination of groundwater due t...

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 Patents(China)
IPC IPC(8): C02F9/14C02F103/06
CPCC02F3/2813C02F2001/007C02F2101/006C02F2103/06C02F2305/06
Inventor 王永鹏张海玲黄鹤翔程梦茜许清华丁欢欢潘社奇周狂飙
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS