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

Detection method for diagnosing phosphate accumulating organisms constitute in sewage water phosphorus removal system

A technology of phosphorus-accumulating bacteria and sewage, applied in the direction of biochemical equipment and methods, microbial measurement/inspection, etc., can solve the problems of different, PAO distinction is not comprehensive and accurate

Inactive Publication Date: 2009-04-29
ZHEJIANG UNIV OF TECH
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some previous reports have given similar methods, they have great limitations on the composition and calculation methods of PAO: (1) PAO is only roughly divided into two types of a-PAO and d-PAO or PAO O ,P ON and P ONn Class III, while ignoring P N and P n / P Nn etc. od-PAO, the distinction between different types of PAO such as a-PAO, d-PAO, f-PAO, oa-PAO, od-PAO is not comprehensive and accurate; (2) previously used for PAO O ,P ON and P ONn The quantitative calculation formula is actually only applicable to the A / O dephosphorization system, but not applicable to the A / A denitrification dephosphorization system due to the different composition of PAO in the sludge

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
  • Detection method for diagnosing phosphate accumulating organisms constitute in sewage water phosphorus removal system
  • Detection method for diagnosing phosphate accumulating organisms constitute in sewage water phosphorus removal system
  • Detection method for diagnosing phosphate accumulating organisms constitute in sewage water phosphorus removal system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] SBR o and SBR n For two sequencing batch biological phosphorus removal systems treating simulated domestic water (such as figure 1 ), effective volume 20L, respectively A / O and A / A (using NO 3 - Electron acceptor, COD / NO 3 --N ratio is controlled at 5.5) to run alternately; a cycle includes 1.5h anaerobic, 2.5h aerobic or anoxic, 2h sedimentation / drainage / water inflow; after sedimentation, remove 18L supernatant (including remaining sludge) to make HRT It is 6.7h; SRT is controlled at 12.5d by aerobic or anoxic residual sludge discharge; the system operates at room temperature of 18°C ​​to 24°C, and the pH is controlled at 7.0±0.5 with 0.5mol / L HCl / NaOH. Raw water is artificially prepared with NaAc, COD110mg / L, NH 4 + -N 18mg / L (indicates that the content is 18mg / L based on N mass), PO 4 3- -P 5mg / L. The operation results show that although the phosphorus removal efficiency of the two systems is similar, the types and quantities of PAO in the sludge are obviou...

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 provides a detection method for diagnosing the structure of Poly-P Accumulating Organisms (PAO) in a sewage disposal system. The method comprises two operational phases of an NO2<-> suppressant check test and a phosphorus uptake determination test, wherein in the first phase, the highest NO2<-> concentration which sludge can bear is determined by examination of the influence of different NO2<-> initial concentrations on denitrifying phosphorus uptake of the tested sludge; and in the second phase, the sludge is subjected to aerobic or anoxic phosphorus uptake reaction under the condition of three different electron acceptors of O2, NO3<-> and NO2<-> respectively, and the phosphorus uptake MO, the phosphorus uptake MON and the phosphorus uptake MONn are obtained. Moreover, the quantitative proportion of various PAOs such as aerobic PAO (a-PAO), denitrifying PAO (d-PAO), facultative PAO (f-PAO), obligative aerobic PAO (oa-PAO) and obligative anoxic PAO (od-PAO) in the sludge is mastered according to the computing formula and the application scope of the sludge on the basis, so that the detection method is favorable for diagnosing and improving the operating efficiency of a phosphorus removal system in time.

Description

(1) Technical field [0001] The invention relates to a detection method for diagnosing the formation of phosphorus-accumulating organisms (Poly-PAccumulating Organisms, PAO) in a sewage treatment system, belonging to the technical field of environmental engineering water pollution control. (2) Background technology [0002] As a green sewage treatment and reuse technology, the biological phosphorus and nitrogen removal process has been widely used in the world because of its advantages of cost-effectiveness and simultaneous removal of carbon, nitrogen and phosphorus. The phosphorus removal system can realize the induced enrichment of PAO in sludge and its effect on PO through the alternation of A / O or A / A environment. 4 3- The purpose of superabsorption removal. But in fact, the competitive interference of glycan bacteria, NO x - The inhibition of PAO anaerobic phosphorus release and excessive aeration will lead to the failure of the operation of the sewage plant. [000...

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): C12Q1/06
Inventor 蒋轶锋陈建孟陈浚
Owner ZHEJIANG 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