Check patentability & draft patents in minutes with Patsnap Eureka AI!

Long-term anoxic starvation and reactivation method to realize short-term nitrification of activated sludge

A technology of activated sludge and short-range nitrification, applied in chemical instruments and methods, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the problems of insufficient carbon source and high energy consumption, and achieve pollution reduction Sludge output, simple treatment method, and the effect of reducing the pressure of sludge treatment and disposal

Active Publication Date: 2021-01-08
BEIJING UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then transition from low-load operation to normal-load operation in the activity recovery stage, supplemented by the activity recovery strategy of low dissolved oxygen and low sludge age, to achieve the purpose of low energy consumption, economical and effective stable short-cut nitrification, and solve the practical problem Insufficient carbon source and high energy consumption in urban sewage biological treatment

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
  • Long-term anoxic starvation and reactivation method to realize short-term nitrification of activated sludge
  • Long-term anoxic starvation and reactivation method to realize short-term nitrification of activated sludge
  • Long-term anoxic starvation and reactivation method to realize short-term nitrification of activated sludge

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Before low-load operation, the actual domestic sewage in a residential area next to a university in Beijing was used as the treatment object (the water quality is as follows: NH 4 + -N concentration is 50-80mg / L, COD is 156-290mg / L, NO 2 - -N≤0.5mg / L, NO 3 - -N≤0.5mg / L), the influent load is 2.3±0.5kg COD·kg -1 MLSS·d -1, Inoculate the nitrifying activated sludge into the SBR reactor with an effective volume of 10L, and maintain the sludge concentration at 3-4g / L. In the aeration stage, the dissolved oxygen is controlled at 0.1-0.6mg / L, the drainage ratio is 50%, and the temperature is room temperature. The reactor operates 3 cycles per day, and each cycle includes: 15 minutes of water inflow, 50 minutes of anaerobic stirring, 240 minutes of low oxygen aeration (0.14 + The removal rates of -N are above 85% and 95% respectively.

[0025] The first step is to run the system at low load. The water load of the system is reduced to 0.06kg COD·kg -1 MLSS·d -1 , Th...

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

Belonging to the technical field of biological sewage treatment, the invention provides a method for realizing high efficiency and short-term nitrification of activated sludge by hypoxic starvation and reactivation. By means of the different physiological characteristics of activated sludge nitrifying bacteria under a starvation condition and in the activity recovery period, a low matrix hypoxic starvation treatment way is adopted to enable ammonia oxidizing bacteria (AOB) with low attenuation rate to maintain activity better than nitrite oxidizing bacteria (NOB). Also in the follow-up activity recovery period, the ABO with fast activity recovery rate can recover the activity faster than NOB, thus realizing short-term nitrification. The method can realize short-term nitrification in a moreenergy-saving way, and is a short-term nitrification realization way for providing stable nitrite matrix for novel denitrification process.

Description

technical field [0001] The invention relates to a low energy consumption, economical and effective method for realizing short-range nitrification of activated sludge, which is suitable for medium and small towns and urban domestic sewage treatment plants adopting activated sludge method, and belongs to the technical field of sewage biological treatment. Background technique [0002] Activated sludge method is currently the most widely used sewage treatment method, which has the advantages of economy and good treatment effect. Traditional nitrogen removal methods such as nitrification and denitrification often face the problems of insufficient carbon sources and high energy consumption. Therefore, new low-energy and high-efficiency sewage denitrification technologies such as short-range nitrification and denitrification and short-range nitrification and anammox integration have emerged as the times require. To achieve short-range nitrification, on the one hand, the nitrifica...

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 Patents(China)
IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/301C02F2101/16
Inventor 彭永臻崔慧慧李夕耀张琼王淑莹
Owner BEIJING UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com