Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for in-situ deep dehydration treatment in urban sludge plants

A deep dewatering and sludge plant technology, applied in water/sludge/sewage treatment, sludge treatment, sludge detoxification, etc., can solve the problems of wasting manpower, material resources and capital, complicated process and unsatisfactory effect, etc. Achieve the effect of saving investment, fast settling speed, and improving dehydration and concentration capacity

Inactive Publication Date: 2019-12-13
湖南鑫恒环境科技有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the sewage and sludge treatment methods in cities and towns are to treat the sewage in the sewage treatment plant first, and the solids and residual sludge generated in the process are transported to a special sludge treatment plant for treatment by means of transportation. The process is complicated, and a lot of manpower, material resources and funds are wasted
In addition, domestic sludge dewatering technologies and methods mainly include mechanical dehydration and physical drying technologies, but they all have disadvantages such as low efficiency, large investment, high operating costs, and unsatisfactory effects, so it is difficult to popularize and apply them

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 in-situ deep dehydration treatment in urban sludge plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take 1.5kg of the sludge to be tested and put it in a beaker, add a mixture of polyaluminum chloride and weak cationic polyacrylamide with a mass ratio of 1:1; the amount of the mixture of polyaluminum chloride and weak cationic polyacrylamide is 30g , the concentration of polyaluminum chloride is 0.08g / L, and the ionicity of weak cationic polyacrylamide is 20%.

[0037] The mixed solution is introduced into a gravity concentration device, and naturally settled, and after 15 minutes, supernatant and concentrated sludge are obtained. Continue to add 0.3g of potassium persulfate to the gravity concentration device and mix with the concentrated sludge. After reacting for 30-60 minutes, add 0.015g of quicklime in the gravity concentration tank and stir thoroughly; then filter through a vacuum filter to achieve solid-liquid purpose of separation.

Embodiment 2

[0039] Take 1.5kg of the sludge to be tested and place it in a beaker, add a mixture of polyaluminum chloride and weak cationic polyacrylamide with a mass ratio of 1:2; the amount of the mixture of polyaluminum chloride and weak cationic polyacrylamide is 30g , the concentration of polyaluminum chloride is 0.06g / L, and the ionicity of weak cationic polyacrylamide is 10%.

[0040] The mixed solution is introduced into a gravity concentration device, and naturally settled, and after 20 minutes, supernatant and concentrated sludge are obtained. Continue to add 0.15g of potassium persulfate to the gravity concentration device and mix with the concentrated sludge. After reacting for 30-60 minutes, add 0.012g of quicklime in the gravity concentration tank and stir thoroughly; then filter through a vacuum filter to achieve solid-liquid purpose of separation.

Embodiment 3

[0042] Take 1.5kg of the sludge to be tested and place it in a beaker, add a mixture of polyaluminum chloride and weak cationic polyacrylamide with a mass ratio of 1:3; the amount of the mixture of polyaluminum chloride and weak cationic polyacrylamide is 75g , the concentration of polyaluminum chloride is 0.06g / L, and the ionicity of weak cationic polyacrylamide is 10%.

[0043] The mixed solution is introduced into a gravity concentration device, and naturally settled, and after 25 minutes, supernatant and concentrated sludge are obtained. Continue to add 0.375g of potassium persulfate to the gravity concentration device and mix with the concentrated sludge. After reacting for 30-60 minutes, add 0.012g of quicklime in the gravity concentration tank and stir thoroughly; then filter through a vacuum filter to achieve solid-liquid purpose of separation.

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
ionicityaaaaaaaaaa
ionicityaaaaaaaaaa
ionicityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for in-situ deep dehydration treatment in urban sludge plants, which comprises the following steps: pumping sludge treated by a sewage treatment plant into a gravity concentration tank, and adding a mixture of polyaluminum chloride and weak cationic polyacrylamide into a conveying pipeline in the sludge conveying process; carrying out natural settling of the sludgefor 15-25 min in the gravity concentration tank so that the purpose of primary concentration and separation is achieved, sending a separated supernate back to a sewage treatment system, and carryingout subsequent treatment of obtained concentrated sludge; adding potassium persulfate into the gravity concentration tank for mixing with the concentrated sludge, adding quick lime into the gravity concentration tank after 30-60 min of reaction, stirring fully; and carrying out deep mechanical dehydration to achieve the purpose of solid-liquid separation; sending an obtained filtrate back to the sewage treatment system, and carrying out resource utilization final treatment of sludge residues. The method for in-situ deep dehydration treatment in the urban sludge plants is low in energy consumption, high in efficiency and simple to operate.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a method for in-situ deep dehydration treatment in an urban sludge plant. Background technique [0002] Sludge is a solid-liquid mixture produced in each unit of the sewage treatment system, an accessory product of the sewage treatment process, and an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. , The moisture content of the sludge is high, even after the concentration treatment, the moisture content of the sludge is still as high as about 80%, the volume is large, the transportation and landfill are inconvenient, and it brings serious secondary pollution and potential pollution. [0003] Sludge treatment is the processing process of thickening, conditioning, dehydrating, stabilizing, drying or incinerating sludge. With the rapid development of China's economic construction and the continuous accele...

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): C02F11/00C02F11/06C02F11/121C02F11/148
CPCC02F11/121C02F11/148C02F11/06C02F11/004
Inventor 冯浩源钟仁华李和平蔡红春彭诗阳
Owner 湖南鑫恒环境科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com