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

A method for coupling residual sludge fermentation with ao biological denitrification

A technology for excess sludge and biological denitrification, which is applied in sludge treatment, biological treatment devices, biological sludge treatment, etc., and can solve the problems of difficult treatment and disposal of excess sludge, low C/N, and insufficient carbon sources in influent water. , to solve the problem of treatment and disposal, reduce the cost of treatment, and achieve the effect of efficient recovery

Active Publication Date: 2016-03-02
BEIJING UNIV OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of insufficient carbon source in the water of the AO denitrification device, low C / N ratio, and difficult treatment and disposal of excess sludge, the present invention proposes a device and method for coupling AO biological denitrification with excess sludge fermentation

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 method for coupling residual sludge fermentation with ao biological denitrification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example

[0024] Each reactor is made of plexiglass, the effective volume of the fermentation device is 20L, and the effective volume of the AO device is 45L; the test water is domestic sewage from the family area of ​​Beijing University of Technology, and its specific indicators are: SCOD=120-180mg / L , NH 4 + -N=50-60mg / L, NO 2 - -N≤0.5mg / L, NO 3 - -N≤0.5mg / L.

[0025] The specific operation is as follows:

[0026] 1 Start-up stage: inoculate the biological denitrification sludge into the AO biological denitrification reactor, control the system sludge concentration at 3000-3500mg / L, the reactor temperature at 25-35°C, the volume of the anoxic section and aerobic section of the AO system ratio, that is, V 缺 :V 好 =1:2, C / N in the control system=4-5, DO in the aerobic section=3-3.5mg / L, HRT=15h, SRT=15d. Take the remaining sludge from the pilot scale SBR as the start-up sludge of the sludge fermentation plant. The indicators of the remaining sludge after elutriation are as follo...

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

Belonging to the technical field of recovery of low C / N sewage treatment, sludge reduction and nitrogen and phosphorus recovery, the invention relates to a device and method for residual sludge fermentation coupled AO biological denitrogenation. The method comprises an AO apparatus, a secondary sedimentation tank, a mud storage box, a fermentation apparatus, a fermentation liquid separation tank, a nitrogen and phosphorus removal tank, and a raw water tank. The method includes: subjecting the residual sludge to anaerobic fermentation in a fermentation apparatus to produce acid, conducting nitrogen and phosphorus removal on the generated fermentation liquor, then using the fermentation liquor as an external carbon source of AO apparatus feedwater to improve the C / N of the AO system feedwater; subjecting the AO apparatus feedwater firstly to denitrification by an anoxic zone, then conducting nitrification by an aerobic zone to remove nitrogen in domestic sewage, discharging the residual sludge of the AO apparatus directly into the fermentation apparatus to produce acid by fermentation so as to reduce the sludge discharge of the AO apparatus, and simultaneously adopting a struvite technique to recover nitrogen and phosphorus in a nitrogen and phosphorus apparatus.

Description

Technical field: [0001] The invention relates to a method for coupling residual sludge fermentation with AO biological denitrification, and belongs to the technical field of low C / N sewage treatment, sludge reduction and nitrogen and phosphorus recovery. The excess sludge is produced by anaerobic fermentation under the action of hydrolytic acidification bacteria, and the fermentation liquid is provided as a carbon source for the AO biological denitrification system to improve the C / N of the system and improve the denitrification effect of the system; The purpose of sludge reduction is achieved under the action of bacteria; at the same time, appropriate magnesium salt and phosphorus salt are added, and ammonia nitrogen and phosphorus are recovered by struvite method. Background technique: [0002] The AO biological denitrification process is a simple and practical biological denitrification technology widely used in sewage treatment plants. It has the advantages of simple pro...

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): C02F11/04C02F11/00C02F9/14
CPCC02F3/308C02F11/00C02F11/04C02F2103/002C02F2103/005C02F2203/004C02F2303/06
Inventor 彭永臻邢立群金宝丹何岳兰王淑莹
Owner BEIJING UNIV OF TECH
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