Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for realizing short distance deep denitrogenation under low temperature

A technology of deep denitrification and low temperature conditions, applied in the directions of aerobic and anaerobic process treatment, can solve the problems of short-range biological denitrification and other disadvantages, and achieve the effect of saving energy consumption for aeration, solving incomplete reaction and high automation level.

Active Publication Date: 2008-09-17
JIANGSU YULONG ENVIRONMENTAL PROTECTION
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lower temperature is extremely unfavorable to the realization of short-term biological nitrogen removal.

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 short distance deep denitrogenation under low temperature
  • Method for realizing short distance deep denitrogenation under low temperature
  • Method for realizing short distance deep denitrogenation under low temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0062] 1) In the short-range deep denitrification start-up stage, run 90 cycles according to the following procedures:

[0063] The actual domestic sewage discharged from a family area of ​​a certain university was used as the experimental object (pH=6.5-7.8, COD=260-350mg / L, TN=75-80mg / L). The selected SBR reactor has an effective volume of 15L, and the water treatment volume per cycle is 12L. The COD concentration of the mixed liquid in the reactor is maintained at 200-300mg / L, and the NH 4 + -N concentration is 55-60mg / L, in the start-up stage of short-range deep denitrification, the reaction temperature is controlled by a temperature control device to 25°C, and the concentration of 95% ethanol is used as an external carbon source. The specific operation process of each cycle is as follows:

[0064] 1 The SBR reactor with an effective volume of 15L is used for water inlet. First, open the water inlet valve, start the water inlet pump to inject the waste water to be treate...

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 nitrogenous wastewater biological treatment process, particularly to a method for realizing short distance deep denitrogenation. The inventive method includes a short distance deep denitrogenation starting-up stage, a stabilizing stage and a cooling stage; and comprises the steps of feeding water, aerating, denitrifying, settling, draining, sludge discharging, and idle running. In the short distance deep denitrogenation starting-up stage, the system temperature is 25 DEG C, the mean sludge retention time is 15 days, and the number of operating periods is 90-95; in the stabilizing stage, the system temperature is 25 DEG C, the sludge retention time is 15 days, and the number of operating periods is 60-65; and in the cooling stage, the system temperature is adjusted to 18 DEG C, the sludge retention time is 15 days, and after 30-35 operating periods, the temperature is adjusted to 11 DEG C, and the sludge retention time is 20 days. The inventive method has the advantages of good denitrogenation effect, high degree of automation, low energy consumption, and capability of stable operation under low temperature conditions.

Description

technical field [0001] The invention relates to a method for realizing a nitrogen-containing wastewater biological treatment process, especially a method capable of realizing a short-range deep denitrification process under low temperature conditions, which is suitable for nitrogen-containing industrial wastewater treatment and urban sewage advanced treatment in cold regions. Background technique [0002] With the rapid development of industry and agriculture, my country has accelerated the pace of water environment treatment, and the sewage treatment rate has been greatly improved. However, the eutrophication problem of slow-flowing water has not been solved, and it is becoming more and more serious. The limiting nutrients in the water body--nitrogen and phosphorus, are the main reasons for the eutrophication of the water body. Biological nitrification and denitrification is currently the most commonly used sewage denitrification method. Traditional nitrification is carrie...

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): C02F3/30
Inventor 彭永臻杨庆李凌云甘一萍常江
Owner JIANGSU YULONG ENVIRONMENTAL PROTECTION
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
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