Catalyst for cracking domestic sludge, preparation method thereof and method for treating domestic sludge

A technology of domestic sludge and catalyst, which is applied in biological sludge treatment, catalyst activation/preparation, sludge treatment, etc. The problems of low energy efficiency in the conversion of mud organic matter, to achieve the effect of simple pretreatment process, reducing non-specific absorption, and saving the amount of enzymes

Active Publication Date: 2019-01-25
YULIN UNIV
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these organic substances exist in the sludge flocs. Under the double protection of the network barrier formed by the sludge flocs and a large amount of exogenous lignocellulose contained in the sludge, it is very difficult to realize the recycling of sludge. The conversion of organic matter into energy is inefficient, which makes it difficult to have both the effective development of sludge energy and the thorough treatment of pollution, which are not contradictory.

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
  • Catalyst for cracking domestic sludge, preparation method thereof and method for treating domestic sludge
  • Catalyst for cracking domestic sludge, preparation method thereof and method for treating domestic sludge
  • Catalyst for cracking domestic sludge, preparation method thereof and method for treating domestic sludge

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The synthetic method of SL-FCCF catalyst disclosed by the invention comprises the steps:

[0034] 1) According to the molar ratio of Fe 2+ :Co 2+ :Fe 3+ = 1:1:5 ratio FeCl 2 4H 2 O, FeCl 3 ·6H 2 O and Co(CH 3 COO) 2 4H 2 O mixed, appropriate addition of distilled water to prepare a solution. Under continuous stirring, add 40% NaOH solution dropwise to the solution until the pH value is 9-12, keep the temperature at 37-47°C, stir and age for 30-60min, magnetically separate and settle, and wash the sediment with deionized water until there is no Cl - Detect, dry, and obtain a magnetic matrix;

[0035] 2) Take CaCl 2 and FeCl 3According to the Ca / Fe molar ratio of 1.5:1 ~ 2.0:1, put it in 100mL deionized water to make a salt solution, add the magnetic matrix prepared above into the above salt solution, and keep the Ca 2+ / Co 2+ The molar ratio is between 25:1 and 40:1. Stir rapidly with a magnetic stirrer in a water bath at 35-45°C for 5 minutes. Then, under...

Embodiment 1

[0044] 1) Synthesis of the catalyst. According to molar ratio Fe 2+ :Co 2+ :Fe 3+ = 1:1:5 ratio FeCl 2 4H 2 O, FeCl 3 ·6H 2 O and Co(CH 3 COO) 2 4H 2 O mixed, appropriate addition of distilled water to prepare a solution. Under constant stirring, add 40% NaOH solution dropwise to the solution until the pH value is 9, keep the temperature at 37°C, stir and age for 30min, magnetically separate and settle, and wash the sediment with deionized water until there is no Cl - Detected, dried to obtain a magnetic matrix; take CaCl 2 and FeCl 3 According to the Ca / Fe molar ratio of 1.5:1, place it in 100mL deionized water, add the magnetic substrate to the above salt solution, and keep the Ca 2+ / Co 2+ The molar ratio is between 25:1. Stir rapidly with a magnetic stirrer in a 35 °C water bath for 5 min. Then, under magnetic stirring, 20 wt% NaOH solution was slowly added to the salt solution until the pH was 9, and the stirring was continued for 30 minutes. The solution ...

Embodiment 2

[0055] 1) Synthesis of the catalyst. According to molar ratio Fe 2+ :Co 2+ :Fe 3+ = 1:1:5 ratio FeCl 2 4H 2 O, FeCl 3 ·6H 2 O and Co(CH 3 COO) 2 4H 2 O mixed, appropriate addition of distilled water to prepare a solution. Under continuous stirring, add 40% NaOH solution dropwise to the solution until the pH value is 9.5, keep the temperature at 39°C, stir and age for 35min, magnetically separate and settle, and wash the sediment with deionized water until it is free of Cl - Detected, dried to obtain a magnetic matrix; take CaCl 2 and FeCl 3 According to the Ca / Fe molar ratio of 1.6:1, place it in 100mL deionized water, add the magnetic matrix to the above salt solution, and keep the Ca 2+ / Co 2+ The molar ratio is between 28:1. Stir rapidly with a magnetic stirrer in a 37 °C water bath for 5 min. Then, under magnetic stirring, 20 wt% NaOH solution was slowly added to the salt solution until the pH was 9.5, and the stirring was continued for 30 minutes. The solu...

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a catalyst for cracking domestic sludge, a preparation method thereof and a method for treating the domestic sludge. The catalyst SL-FCCF for cracking the domestic sludge and visible light are applied to sludge cells and sludge lignocellulose to achieve mud cell wall breaking and achieve stability breaking of the sludge lignocellulose. After the visible light is removed, SL-FCCF can strengthen the enzyme activity and reduce the enzyme load, which is beneficial to the decarboxylation reaction, and significantly improves the reducing sugar and ethanol yield rate. The method has few treatment steps and does not need to add too many chemical agents, the prepared catalyst can be applied to the whole process of sludge reduction and resource utilization, be convenient to recycle and can be recycled many times, and the sludge processing costs are saved remarkably, which is important for effectively solving energy crises and relieving environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and relates to a catalyst for cracking domestic sludge, a preparation method thereof and a method for treating domestic sludge. Background technique [0002] The treatment and disposal of sludge has become a major problem and challenge for sewage treatment plants. Due to the high moisture content and large volume of the sludge, and improper treatment of pathogenic bacteria, heavy metals and other pollutants in the sludge will cause serious secondary pollution, causing great harm to the ecological environment, and also seriously restricting the sewage treatment plant. running. At present, the commonly used sludge treatment methods include sludge dehydration, concentration, digestion, drying, incineration, fermentation, etc. With the development of modern technology and the improvement of environmental standards, the disadvantages of these sludge treatment and disposal technologies are i...

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): B01J31/28B01J37/03C02F11/00C02F11/02
CPCB01J31/28B01J35/004B01J37/031C02F11/00C02F11/02C02F2305/10
Inventor 相玉琳相玉秀焦玉荣戴春雨王若恺王立鹏
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