Water-retaining agent prepared from excess sludge, and preparation method and using method thereof

A technology of excess sludge and water-retaining agent, which is applied in the fields of land preparation methods, chemical instruments and methods, and applications, can solve the problems of high cost, long time consumption, and slow physical methods of biological methods, so as to avoid insufficient degradation and improve preparation. Good yield and water retention effect

Active Publication Date: 2020-02-11
YULIN UNIV
View PDF10 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above research methods have strong guiding significance for the effective treatment of excess sludge, but there are more or less different shortcomings in these research methods: the addition of chemical agents in chemical methods i...

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
  • Water-retaining agent prepared from excess sludge, and preparation method and using method thereof
  • Water-retaining agent prepared from excess sludge, and preparation method and using method thereof
  • Water-retaining agent prepared from excess sludge, and preparation method and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Material preparation:

[0056] The remaining sludge was taken from the urban sewage treatment plant, and it was confirmed that there was no heavy metal pollution; the magnetic magnesium aluminum hydrotalcite was synthesized by coprecipitation method; the analytically pure HCl was purchased from the chemical reagent factory.

[0057] (2) Preparation of water retaining agent:

[0058] First, measure 100mL of excess sludge without heavy metal pollution and 0.5g of magnetic magnesium-aluminum hydrotalcite into a 200mL volumetric flask, stir thoroughly for 1.5h, and then apply ultrasonic waves for 3min with an ultrasonic power of 360W. After the ultrasound is completed, use electron beam irradiation technology for 1min, and the irradiation meter is 35kGy, then take out the volumetric flask, cool to room temperature, and centrifuge to obtain supernatant A and solid B;

[0059] Then, the obtained solid B is subjected to magnetic separation to obtain magnetic magnesium alu...

Embodiment 2

[0067] (1) Material preparation:

[0068] The preparation of excess sludge, magnetic magnesium aluminum hydrotalcite, and HCl is the same as in Example 1.

[0069] (2) Preparation of water retaining agent:

[0070] First, measure 100 mL of excess sludge without heavy metal pollution and 0.8 g of magnetic magnesium-aluminum hydrotalcite into a 200 mL volumetric flask, stir thoroughly for 1.8 h, and then apply ultrasonic waves for 5 min with a power of 360 W. After the ultrasound is completed, use electron beam irradiation technology for 2 minutes, and the irradiation meter is 38kGy, then take out the volumetric flask, cool to room temperature, and centrifuge to obtain supernatant A and solid B;

[0071] Then, the obtained solid B is subjected to magnetic separation to obtain magnetic magnesium aluminum hydrotalcite. Fully mix the magnetic hydrotalcite and liquid A in the flask, and then irradiate with electron beam for 11 minutes, and the irradiation meter is 0.8kGy. Then th...

Embodiment 3

[0079] (1) Material preparation:

[0080] The preparation of excess sludge, magnetic magnesium aluminum hydrotalcite, and HCl is the same as in Example 1.

[0081](2) Preparation of water retaining agent:

[0082] First, measure 100 mL of excess sludge without heavy metal pollution and 1.0 g of magnetic magnesium-aluminum hydrotalcite into a 200 mL volumetric flask, stir thoroughly for 2 hours, and then apply ultrasonic waves for 7 minutes with a power of 360 W. After the ultrasonic wave is completed, it is treated with electron beam irradiation technology for 3 minutes, and the irradiation meter is 40kGy, then the volumetric flask is taken out, cooled to room temperature, and centrifuged to obtain supernatant A and solid B;

[0083] Then, the obtained solid B is subjected to magnetic separation to obtain magnetic magnesium aluminum hydrotalcite. Fully mix the magnetic hydrotalcite and liquid A in the flask, and then irradiate with electron beam for 12 minutes, and the irrad...

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 water-retaining agent prepared from excess sludge, and a preparation method and a using method thereof, and belongs to the technical field of excess sludge treatment. Organicmatters contained in the excess sludge, such as proteins and polysaccharides, can be degraded by using magnetic magnesium-aluminum hydrotalcite, the ultrasonic action and an electron beam irradiationtreatment technology, and degraded polysaccharide molecules and degraded protein molecules undergo freezing, drying, heat treatment and dissolution processes under the action of hydrogen bonds, hydrophobicity, static electricity and the like to form an amphiphilic compound; and the amphiphilic compound undergoes a self-assembling reaction in a water phase to obtain a stable nanogel which can be used as the water-retaining agent. The resourceful treatment of the excess sludge is realized, the water-deficient and nutrient-deficient conditions of sandy soil can be improved, the ecological environment is restored, and the prepared water-retaining agent does not cause heavy metal or microbial pollution to soil after long-term use, does not cause hardening of soil or deterioration of physicochemical properties, and can be applied safely.

Description

technical field [0001] The invention relates to the technical field of excess sludge treatment, in particular to a water-retaining agent prepared from excess sludge, a preparation method and a use method thereof. Background technique [0002] In recent years, the number of sewage treatment plants in my country has increased significantly. By the end of 2018, there were 4,332 sewage treatment plants in operation in cities and towns across the country, with a sewage treatment capacity of 195 million m 3 / d, a large amount of excess sludge is generated. These sludges are enriched with the toxic essence of sewage, and the pollution is very serious. However, compared with the rapid development of urban sewage treatment technology, the effective treatment and disposal of sludge is obviously lagging behind. A large amount of excess sludge has not been effectively and safely disposed of, and a large number of pollutants in sewage have returned to the environment, resulting in Ther...

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
IPC IPC(8): C09K17/40A01B79/02A01B79/00C09K101/00
CPCA01B79/00A01B79/02C09K17/40C09K2101/00
Inventor 相玉琳相玉秀王德权刘叶海戴春雨
Owner YULIN 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