A<2>/O and MBR combined sewage regenerating process and device

A regeneration device and sewage technology, which is applied in the field of water treatment, can solve the problems of difficult biological treatment, low nitrogen and phosphorus removal efficiency, and high self-control requirements, to achieve enhanced biological nitrogen and phosphorus removal functions, increase operational flexibility, and operate Good flexibility

Inactive Publication Date: 2014-07-02
CHINA UNION ENG
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The intermittent cycle operation of the process has high requirements for self-control; variable water level operation requires large power consumption; the efficiency of nitrogen and phosphorus removal is not very high, and the sludge stability is poor
3)A 2 /O series process: It has simple process flow, high pollutant removal efficiency, stable operation, good impact load resistance, and good sludge settlement performance, but the sludge concentration in the system is low, and the sludge returns to the anaerobic tank , with

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&lt;2&gt;/O and MBR combined sewage regenerating process and device
  • A&lt;2&gt;/O and MBR combined sewage regenerating process and device
  • A&lt;2&gt;/O and MBR combined sewage regenerating process and device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] Taking the influent water (mechanical grid, regulating tank, membrane grid) of a sewage treatment station in the core area of ​​a new city as an example, the influent COD, ammonia nitrogen and total phosphorus value (COD= 100-400mg / L, ammonia nitrogen = 10-40mg / L, TP=2.5-3.5mg / L). The hydraulic retention time (HRT) in the deoxygenation, anaerobic, anoxic and aerobic zones is 0.5h, 1h, 2.5h and 3h, respectively, the mixed liquid reflux ratio is 200%, and the sludge reflux ratio is 100%. When the sewage water temperature is greater than 15°C, the biological nitrogen and phosphorus removal mode is operated, and the biological nitrogen and phosphorus removal is performed; when the water temperature is ≤15°C, the biological nitrogen removal mode is operated, and 30mg / L aluminum sulfate is added to the aerobic tank. The MBR membrane bioreactor uses hollow fiber membrane modules. The effluent of the treatment device meets the quality standards of urban greeni...

Example Embodiment

[0028] Example 2

[0029] Example 2 is a scenic lake reclaimed water treatment station project. The difference from Example 1 is that the MBR membrane bioreactor adds a deep chemical phosphorus removal process after the water is discharged, and the dosage of polyaluminum chloride is 30mg / L; the water temperature is ≤15℃ When running in the denitrification mode, add 20mg / L polyaluminum chloride into the aerobic tank. Activated sand filter is used for deep filtration, and the filtration speed is 5m 3 / (m 2 . Due to the addition of an advanced chemical phosphorus removal process, the treated effluent reaches the standard of "Water Quality for Urban Sewage Recycling Landscape Environment" (GB / T 18920-2002).

[0030] It can be concluded from Examples 1 and 2 that after the wastewater regeneration treatment by this process, the nitrogen and phosphorus removal effect is good, the process operation flexibility is high, and the effluent quality can reach the urban miscellaneous water quali...

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 discloses an A<2>/O and MBR combined sewage regenerating process. The sewage is discharged after being sequentially processed by an anaerobic tank, an anoxic pool, an aerobic pool and an MBR membrane pool. The process is characterized by also comprising the steps of deoxidizing a mixed solution inside the MBR membrane pool through a deoxidation pool and then returning to the anaerobic tank or the anoxic pool. The invention also comprises an A<2>/O and MBR combined sewage regenerating device. The improved A<2>/O and MBR combined sewage regenerating process and device disclosed by the invention have the advantages of being high in denitrification and dephosphorization efficiency, stable to run, good in operation flexibility, high in effluent quality, and the like. The effluent can achieve the water quality standard of reclaimed water reuse, and the process is an ideal sewage treatment process combining biological treatment with advanced treatment.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to the improved type A 2 / O + MBR combined sewage regeneration process and its device. Background technique [0002] During the "Twelfth Five-Year Plan" period, along with the upgrading and transformation of sewage treatment plants, the proportion of reclaimed water reuse has continued to increase, and higher requirements have been put forward for sewage treatment processes and effluent standards. In order to meet the national standards for urban sewage recycling and utilization, the secondary biochemical treatment in the sewage treatment process usually needs to have the function of nitrogen and phosphorus removal, which generally includes alternating cycles of three different processes: anaerobic, anoxic, and aerobic, and suspension-type actives are often used There are three main series of sludge method: oxidation ditch series, sequencing batch reactor (SBR) series, A 2 / O series...

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): C02F9/14
Inventor 黄重成张萍黄周蔚
Owner CHINA UNION ENG
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