Method for realizing rapid growth of biological membrane in nitrosation process

A rapid growth and biofilm technology, applied in chemical instruments and methods, aerobic process treatment, sustainable biological treatment, etc., can solve the problems of long generation cycle, slow growth, and difficulty in enrichment and cultivation, and achieve high vigor and optimization Effect of treatment conditions, macrobiofilm growth rate

Active Publication Date: 2019-05-03
TONGJI UNIV
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sewage usually contains a large amount of biodegradable COD. Studies have shown that in the presence of soluble biodegradable COD, denitrifying bacteria often have a competitive advantage and eliminate ammonia oxidizing bacteria. In addition, ammonia oxidizing bacteria are autotrophic Type bacteria, long generation cycle, slow growth, enrichment culture is difficult

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 realizing rapid growth of biological membrane in nitrosation process
  • Method for realizing rapid growth of biological membrane in nitrosation process
  • Method for realizing rapid growth of biological membrane in nitrosation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, the biofilm growth rate is measured by calculating the biofilm growth / separation rate under different operating modes and influent COD conditions, and the optimal condition for the fastest growth rate is determined. In order to achieve the above purpose, in this example, by inoculating mature nitrosative sludge, under continuous aeration and intermittent aeration conditions, the COD of the reactor influent was gradually increased, and the biofilm growth / separation rate was measured at each experimental stage.

[0028] The first step, the establishment of nitrosation process system

[0029] The 160-day stable nitrosation sludge was inoculated into the moving bed biofilm reactor (MBBR) with continuous aeration (RC) and RI with intermittent aeration (RI), respectively, in RC and RI reactors The sludge concentrations of the two reactors were 10449g SS / L and 9577g SS / L; the parameters of the two reactors were the same, the inner diameter was 15cm, the hei...

Embodiment 2

[0054] A method for realizing the rapid growth of biofilm in the nitrosation process. The method adopts a moving bed biofilm reactor system, and ammonia nitrogen wastewater is input into the moving bed biofilm reactor. Under continuous aeration conditions, the ammonia nitrogen wastewater is sub Nitrification treatment; in ammonia nitrogen wastewater, the mass concentration ratio of COD to ammonia nitrogen is 0.1.

[0055] Among them, in the ammonia nitrogen wastewater, the mass concentration of ammonia nitrogen is 320mg / L. The continuous aeration conditions are as follows: the aeration rate is 0.3L / min, and the dissolved oxygen content is 1.5mg / L. Nitrosification sludge was inoculated in the moving bed biofilm reactor. The internal temperature of the moving bed biofilm reactor was 31 °C. In the moving bed biofilm reactor, the influent flow rate of ammonia nitrogen wastewater is 0.75L / h, and the hydraulic retention time is 8h. In the moving bed biofilm reactor, the speed of ...

Embodiment 3

[0057] A method for realizing the rapid growth of biofilm in the nitrosation process. The method adopts a moving bed biofilm reactor system, and ammonia nitrogen wastewater is input into the moving bed biofilm reactor. Under continuous aeration conditions, the ammonia nitrogen wastewater is sub Nitrification treatment; in ammonia nitrogen wastewater, the mass concentration ratio of COD to ammonia nitrogen is 0.25.

[0058]Among them, in the ammonia nitrogen wastewater, the mass concentration of ammonia nitrogen is 280mg / L. The continuous aeration conditions are: the aeration rate is 0.5L / min, and the dissolved oxygen content is 0.5mg / L. Nitrosification sludge was inoculated in the moving bed biofilm reactor. The internal temperature of the moving bed biofilm reactor was 33°C. In the moving bed biofilm reactor, the influent flow rate of ammonia nitrogen wastewater is 0.35L / h, and the hydraulic retention time is 16h. In the moving bed biofilm reactor, the speed of the agitato...

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 relates to a method for realizing rapid growth of a biological membrane in a nitrosation process. According to the method, a moving bed biofilm reactor system is adopted, ammonia nitrogen wastewater is fed into the moving bed biofilm reactor, and the ammonia nitrogen wastewater is subjected to nitrosation treatment under a continuous aeration condition, wherein the mass concentrationratio of chemical oxygen demand (COD) to ammonia nitrogen in the ammonia nitrogen wastewater is 0.1-0.25. Compared with the prior art, the method disclosed by the invention has the following advantages that the moving bed biofilm reactor system is adopted to treat the ammonia nitrogen wastewater, and treatment conditions are optimized, so that rapid growth of the biological membrane in the nitrosation process can be realized, and the purpose of rapid enrichment of functional microorganisms is achieved; in addition, the growth and changing speed of the biological membrane can be accelerated, so that the biological membrane keeps relatively high activity and has good engineering significance for starting and running of the nitrosation process.

Description

technical field [0001] The invention belongs to the technical field of ammonia nitrogen wastewater treatment, and relates to a method for realizing rapid growth of biofilm in a nitrification process. Background technique [0002] In recent years, the new nitrogen removal process anammox technology has been widely studied because of its many advantages. As one of the substrates of anammox, nitrite is usually produced by the nitrosation process. According to the principle of oxidation reaction, the researchers developed two new types of denitrification processes: one is represented by SHARON-ANAMMOX (nitrosation-anammox), and the nitrosation and anaerobic ammonium oxidation are completed in two reactors respectively. The other type is represented by CANON, which completes the single-stage reaction of nitrosation and anammox in one reactor. Numerous studies have shown that whether it is a two-stage process or a single-stage process, effective control of the nitrosation process...

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): C02F3/08C02F3/10
CPCY02W10/10
Inventor 王亚宜王俊杰张姚张哲
Owner TONGJI UNIV
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