Short distance denitrifying dephosphatation double-sludge technique taking granular sludge as medium and device thereof

A technology of short-range denitrification and denitrification phosphorus removal, which is applied in the field of short-range denitrification phosphorus removal double-sludge technology and equipment using granular sludge as the medium, which can solve the problems of unsatisfactory sludge-water separation, high infrastructure and operating costs, and technical process problems. Complexity and other issues, to achieve the effect of reducing infrastructure costs and operating costs, increasing processing capacity and operational stability, and simplifying the process

Active Publication Date: 2010-01-20
HEILONGJIANG BISHUIYUAN ENVIRONMENTAL PROTECTION ENG CO LTD
View PDF0 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the reaction carrier of this process is flocculent sludge, the mud-water separation effect in the intermediate sedimentation tank is not ideal, and the sludge after anaerobic phosphorus release has to flow back to the anoxic zone to participate in the phosphorus absorption reaction, and it is inevitable that part of the ammonia nitrogen in the sewage will be absorbed together. Converge to the anoxic zone, and this part of ammonia nitrogen has the disadvantage of high concentration of ammonia nitrogen in the effluent because it cannot be nitrified
In order to remove the remaining ammonia nitrogen, it is necessary to add a post-aeration tank, so this process has the problems of complex process flow, high infrastructure and operation costs

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
  • Short distance denitrifying dephosphatation double-sludge technique taking granular sludge as medium and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The actual domestic sewage discharged from a family area of ​​a university is used as the raw water, the influent pH=7.8-8.0, COD=260-350mg / L, NH 4 + -N=20-40 mg / L, TP=5.0-10.0 mg / L. The operating parameters of the anaerobic / anoxic SBR reactor and the short-cut nitrification SBR reactor were the same as those of cultivation. The raw sewage enters the anaerobic / anoxic SBR reactor to complete the release of phosphorus, and after precipitation, it enters the short-path nitrification SBR for nitrification reaction. The nitrite accumulation rate of short-course nitrification SBR is maintained at 80-90%, and the concentration of nitrite after nitrification is 12-30mg / L. The supernatant containing nitrite is returned to the anaerobic / anoxic SBR reactor for simultaneous denitrification and denitrification and phosphorus removal. At a room temperature of 25°C, when the pH sensor is used to control the anaerobic / anoxic SBR denitrification phosphorus uptake, the pH is maintaine...

Embodiment 2

[0050] The actual domestic sewage discharged from a family area of ​​a university is used as raw water, diluted with an appropriate amount of tap water or added with glucose, NH 4 Cl or K 2 HPO 4 In order to achieve different COD, ammonia nitrogen and total phosphorus values ​​(COD=400-600mg / L, NH 4 + -N=50-80 mg / L, TP=10.0-20.0 mg / L). The operating parameters of the anaerobic / anoxic SBR reactor and the short-cut nitrification SBR reactor were the same as those of cultivation. The raw sewage enters the anaerobic / anoxic SBR reactor to complete the release of phosphorus, and after precipitation, it enters the short-path nitrification SBR for nitrification reaction. The short-cut nitrification SBR nitrite accumulation rate is maintained at 80-90%, the nitrite concentration after nitrification is 42-70mg / L, and the pH sensor is used to control the anaerobic / anoxic SBR denitrification phosphorus absorption, and the pH is maintained at 8.0-8.2 Around, at room temperature 25°C, ...

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 belongs to the field of sewage treatment and provides a short distance denitrifying dephosphatation double-sludge technique taking granular sludge as medium and a device thereof. The device sequentially comprises a raw water pipe, a water inlet tank and a water inlet valve, and is characterized by further sequentially comprising an anaerobic/anoxic SBR reactor and an intermediate water tank which are connected with each other by a pipeline as well as a short distance nitration SBR reactor and a back flow water tank that are also connected with each other by the pipeline; wherein the intermediate water tank is connected with the short distance nitration SBR reactor, and the back flow water tank is connected with the anaerobic/anoxic SBR reactor; the anaerobic/anoxic SBR reactor and the short distance nitration SBR reactor are internally provided with stirring devices, and a drain pipe is arranged on the anaerobic/anoxic SBR reactor; the short distance nitration SBR reactor is internally provided with an aerating apparatus; the granular sludge which is processed by acclimatization and has the function of denitrifying dephosphatation is put into the anaerobic/anoxic SBR reactor, and the granular sludge which is processed by acclimatization and has the function of short distance nitration is put into the short distance nitration SBR reactor. The invention solves the problems of unstable effect of nitrogen and phosphorus removal of sewage, high content of effluent suspended matter and lower pass rate, so as to be used for low C/N waste water treatment.

Description

technical field [0001] The technical field of the claimed technical solution is: the technical field of nitrogen and phosphorus eutrophication sewage treatment, which relates to an efficient nitrogen and phosphorus sewage treatment method to solve the problem of unstable denitrification and phosphorus removal effects of sewage and high content of suspended solids in effluent As well as the problem of low compliance rate, it is suitable for low C / N wastewater treatment. Background technique [0002] The eutrophication of water bodies caused by nitrogen and phosphorus pollution has always been one of the main problems faced by countries all over the world, and it is also the difficulty and focus of water treatment. In the traditional nitrogen and phosphorus removal mechanism, nitrogen and phosphorus removal must be completed independently by obligate denitrifying bacteria and obligate phosphorus accumulating bacteria, and it needs to involve multiple biochemical processes such...

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): C02F9/14C02F3/30C02F3/28C02F3/12
CPCY02W10/10
Inventor 彭永臻吴蕾王淑莹李凌云马勇
Owner HEILONGJIANG BISHUIYUAN ENVIRONMENTAL PROTECTION ENG CO LTD
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