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

Breeding method for anaerobic ammonium oxidation granular sludge

An anaerobic ammonium oxidation and granular sludge technology, which is applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. , the research is still less and other issues, to achieve the effect of shortening the start-up time

Inactive Publication Date: 2011-09-21
EAST CHINA NORMAL UNIV
View PDF9 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the anaerobic ammonium oxidation reaction was discovered by Mulder and others at Delft University in the Netherlands in 1995, scholars at home and abroad have conducted a lot of research on this technology. Most of these research reports are based on artificially synthesized wastewater with high ammonia nitrogen concentration. Most of the inoculated sludge is a single type of sludge or a mixed sludge of two kinds of sludge, but under the condition of low concentration of ammonia nitrogen, the research on the anaerobic ammonium oxidation process of inoculated sludge as a variety of sludge sources is still less
There are also many limiting factors in the anammox reaction, such as: temperature, pH, Do, light, sludge age, substrate concentration, etc. Among them, due to the long growth cycle of anammox bacteria, the doubling time is as long as 11 days, and the anaerobic ammonium oxidation The start-up of the oxyammonium oxidation process has a greater impact

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Use urban domestic sewage with an ammonia nitrogen concentration of 25±1mg / L as the experimental water, and add NaNO 2 Adjust the concentration of nitrous nitrogen in the influent to 26±1mg / L. The inoculum sludge is anaerobic digested sludge, black and odorous river bottom sludge and good sample activated sludge, the volume ratio of which is 2:2:1, and the sludge concentration after mixing is 13.24mg / L. In the process of inoculating sludge, honeycomb particles of 1 / 4 of the total sludge volume were added as a carrier. Before the start of the test run, the domestic sewage with the same volume as the total sludge is added to the ASBR reactor through a peristaltic pump, the pH value of the influent water is adjusted between 7.5 and 8.2, and the temperature of the entire device is kept between 33 ° C and 35 ° C , isolated from light, and the stirring speed was 120r / min. After 48 days of stable operation, the hydraulic retention time was adjusted from 24h to 18h. After 78 ...

Embodiment 2

[0026] As a control experiment. Under the condition that other conditions are the same, change the proportion of inoculated sludge. The reactor was inoculated with mixed sludge of digested sludge and aerobic activated sludge, the volume ratio was 4:1, and the total sludge volume was the same as that of the experimental inoculated sludge in Example 1. Also after 51 days of stable operation, the hydraulic retention time was adjusted from 24h to 18h. After 99 days of operation, the reactor entered a stable stage, and the removal rates of ammonia nitrogen and nitrous nitrogen reached more than 90%. During the following month of operation, the removal rate of ammonia nitrogen and nitrite nitrogen in the system was relatively stable, both of which remained above 88%, and the sludge color also changed from black to taupe granular sludge.

Embodiment 3

[0028]As a control experiment, the inoculated sludge was the bottom sludge of digested sludge and black-stinky river mud, the volume ratio was 1:1, and the total sludge volume was the same as that of the experimental inoculated sludge in Example 1. After 63 days of stable operation, the hydraulic retention time was adjusted from 24h to 18h. After 108 days of operation, the reactor entered a stable stage, and the removal rates of ammonia nitrogen and nitrous nitrogen reached more than 90%. During the following month of operation, the removal rate of ammonia nitrogen and nitrite nitrogen in the system was relatively stable, both of which remained above 85%, and the sludge color also changed from black to gray-brown granular sludge.

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

PropertyMeasurementUnit
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a breeding method for anaerobic ammonium oxidation granular sludge. The breeding method comprises the following steps that: (1), municipal domestic wastewater with a low organic carbon concentration is utilized as feed water and NaNO2 is added into the feed water; (2), anaerobic digested sludge, honeycomb stone particles, black and smelly river sediment and aerobic activated sludge are added orderly into an anaerobic sequencing batch reactor (ASBR) and are mixed well; (3), the feed water is fed into the ASBR through a peristaltic pump to undergo a reaction for at least 78 days under conditions of shading and sealing and then tawny granular sludge as an objective product is obtained, wherein removal rates of ammonia nitrogen and nitrite nitrogen are over 92%. Through utilizing seed sludge widely available, the breeding method of the invention realizes that waste is treated by wastes; sludge granulation time and anaerobic ammonium oxidation reactor starting timeare reduced; and ammonia nitrogen is removed efficiently.

Description

technical field [0001] The invention relates to a method for cultivating granular sludge in an urban sewage treatment system, in particular to a method for cultivating anaerobic ammonium oxidation granular sludge. Background technique [0002] With the development of industrial and agricultural production and the improvement of people's living standards, the discharge of nitrogen-containing compounds has increased sharply, causing serious water environmental pollution and water eutrophication. Many lake water bodies can no longer perform their normal functions and affect industry and agriculture. And fishery production, such as Taihu Lake and Chaohu Lake, due to nitrogen pollution, a large area of ​​blue-green algae broke out, resulting in a serious decline in lake water quality. Nitrogen is an important polluting element that causes eutrophication, hypoxia, and black odor in water bodies. It has the characteristics of wide sources and large emissions. Ammonia nitrogen is th...

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): C02F3/28C02F101/16
Inventor 林剑波何岩黄民生朱勇耿亮陈玉霞吴小慧
Owner EAST CHINA NORMAL UNIV
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