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

Method of all self-oxygen ammonia nitrogen removal by particle sludge

A granular sludge and anaerobic granular sludge technology, applied in the field of ammonia nitrogen removal, can solve the problems of low sludge concentration and high investment and operation costs, achieve high microbial biomass, reduce operational difficulty and operating costs, and improve removal efficiency

Inactive Publication Date: 2010-12-29
DONGGUAN UNIV OF TECH
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of method that utilizes granular sludge to carry out the method of full auto-oxygen deammonization nitrogen in view of the deficiencies in the prior art; The nitrification process still needs to add carbon sources, high investment and operation costs, etc., while effectively reducing the pollution of nitrogen to water bodies

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

[0016] The aerobic sludge from the aeration tank of the urban sewage treatment plant and the anaerobic sludge from the concentration tank are mixed according to the mass ratio of 5:1, and then the mixed sludge is inoculated into the upflow aerobic sludge bed reactor; Configure the ammonia nitrogen concentration of simulated wastewater to be 500mg / L, add MgCl 2 The concentration is 20mg / L, the operating conditions of the reactor are: temperature 25-35°C, pH value 6.2-7.8, dissolved oxygen 2.5-5.3mg / L, hydraulic retention time 6-10 hours, air aeration , the air rate is 20-30L / h, and after 75 days of stable operation, brown aerobic denitrification granular sludge was observed in the reactor, with a particle size of 0.7-1.1mm and a density of 1.01-1.28g / cm 3 . At the same time, the removal rate of total nitrogen in wastewater reaches 82%.

Embodiment 2

[0018] Using the same inoculated sludge as in Example 1, the ammonia nitrogen concentration of artificially configured simulated wastewater is 500 mg / L, and MgCl is added 2 The concentration is 15mg / L, CaCl 2 The concentration is 5mg / L, and the brown aerobic denitrification granular sludge was observed in the reactor after 83 days of stable operation, with a particle size of 0.8-1.2mm and a density of 1.03-1.19g / cm 3 , At the same time, the removal rate of total nitrogen in wastewater reaches 85%.

Embodiment 3

[0020] The activated sludge from the sewage treatment system of a chemical fertilizer plant was used to inoculate into the upflow aerobic reactor, the total nitrate concentration of simulated wastewater was artificially configured to be 800mg / L, and the air velocity of the reactor was 30-45L / h. Other conditions and implementation The same as Example 1, after 89 days of continuous operation, brown aerobic denitrification granular sludge was observed in the reactor, with a particle size of 2.2-3.2mm and a density of 1.18-1.40g / cm 3 , The total nitrogen removal rate reached 89.5%.

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
Particle sizeaaaaaaaaaa
Densityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of ammonia nitrogen removal in waste water treatment, in particular to a method of all self-oxygen ammonia nitrogen removal by particle sludge. The method comprises the following steps: loading inoculated active sludge into an upflow anaerobic sludge bed reactor; pumping ammonia nitrogen waste water which does not contain organic carbon source out of the bottom of the reactor; causing the waste water to flow out of the upper part of the reactor after flowing through the sludge bed; meanwhile, adopting air aeration; after cultivating for 40-105 days, obtaining favourable all self-oxygen ammonia nitrogen particle sludge; and converting ammonia nitrogen parts into nitrogen gas, and effectively removing the nitrogen gas. The nitrogen removal particle sludge obtained by the method of the invention has good performance, can improve the volume load and operation stability of the reactor, does not need additional carbon resource, is suitable for processing waste water with high ammonia nitrogen ration and low carbon nitrogen ratio and inorganic waste water containing nitrogen.

Description

Technical field: [0001] The invention relates to the technical field of methods for removing ammonia nitrogen in wastewater treatment, in particular to a method for fully aerobic oxygen removal of ammonia nitrogen by using granular sludge. Background technique: [0002] Ammonia nitrogen is one of the main pollutants of eutrophic oxidation in water bodies. The removal methods of ammonia nitrogen in wastewater include physical, chemical and biological methods, among which biological method is widely used as an economical and efficient denitrification method. [0003] Traditional biological denitrification generally includes two stages of nitrification and denitrification, but the aeration in the nitrification stage consumes high energy and alkalinity, while the denitrification stage requires organic carbon sources, coking, petrochemical, landfill leachate, fertilizers, etc. For ammonia nitrogen and low carbon to nitrogen ratio wastewater, organic carbon sources such as methano...

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 徐勇军谢磊杨晓西刘治猛
Owner DONGGUAN UNIV OF TECH
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