Method for deeply treating sewage by using calcined pyrite as filtering material

An advanced treatment, pyrite technology, applied in the direction of anaerobic digestion treatment, etc., can solve the problems of low concentration of anaerobic denitrification microorganisms, low treatment efficiency, poor treatment effect, etc., and achieve simultaneous denitrification and phosphorus removal to reduce organic pollutants effect of concentration

Active Publication Date: 2014-11-19
HEFEI UNIV OF TECH
View PDF7 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Third, Thiobacillus denitrificans is an anaerobic microorganism and cannot play a role in an aerobic system, but water always contains a certain amount of dissolved oxygen. How to use technology to provide anaerobic ecological environment for anaerobic microorganisms such as Thiobacillus denitrificans , promoting the metabolism of such microorganisms to reduce nitrate is the key issue;
[0011] Fourth, some anaerobic nitrate-reducing bacteria such as Thiobacillus denitrification are au

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 deeply treating sewage by using calcined pyrite as filtering material
  • Method for deeply treating sewage by using calcined pyrite as filtering material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Non-limiting examples of the present invention are as follows:

[0039] Hand-selected ore from pyrite mines, the mass percentage of pyrite is 95%, and a small amount of impurities is quartz. Crushing and screening to obtain pyrite particles with a particle size in the range of 0.2-0.6mm;

[0040] The pyrite particles are calcined in a boiling furnace at 750°C under a protective atmosphere, so that the pyrite can be completely and quickly converted into pyrrhotite to obtain calcined pyrite; figure 1 This is a photo of the filter material in the filter tank prepared by the present invention. figure 2 It is a field emission scanning electron microscope image of calcined pyrite. It can be seen that the calcined pyrite has a porous structure.

[0041] Use PVC pipes with a diameter of 30 mm and a length of 2000 mm to set up glass pipes with a diameter of 6 mm from bottom to top at 200 mm intervals, which are used as water inlets and outlets and sampling ports along the way to cons...

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 discloses a method for deeply treating sewage by using calcined pyrite as a filtering material. The method is characterized in that calcined pyrite is adopted as the filtering material. Anaerobic microbes such as denitrifying bacteria, thiobacillus denitrificans, iron-oxidizing bacteria depending on nitrate, ammonia-oxidizing bacteria, and the like are loaded on the surface of the filtering material. Second-stage treatment discharged water from a domestic sewage treatment factory, eutrophic ground surface water, or aquaculture water is continuously delivered to a filtering tank loaded with calcined pyrite for treatment, until phosphorous concentration of discharged water exceeds 0.1mg/L. With the method provided by the invention, a comprehensive effect of synchronous nitrogen removing, phosphorous removing, and organic pollutant concentration reducing is provided. The treatment efficiency is high.

Description

1. Technical Field [0001] The invention relates to a method for deep denitrification and dephosphorization treatment of domestic sewage and eutrophic water. 2. Background technology [0002] With the intensification of water pollution, eutrophication has generally occurred in surface water bodies in my country. This requires stricter nitrogen and phosphorus removal treatment for sewage. The nitrogen in the secondary effluent of domestic sewage and the surface landscape water mainly exists in the form of ammonia, nitrate, nitrite and organic nitrogen, and the phosphorus mainly exists in the form of orthophosphate and organic phosphorus. [0003] At present, the advanced treatment of ammonia nitrogen in water is mainly through microbial nitrification in the aerated biological filter, which converts ammonia nitrogen into nitrate and nitrite nitrogen. The removal rate of ammonia nitrogen can reach more than 90%, and the removal rate of total nitrogen is not high, generally 20 -40%. ...

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): C02F3/28
Inventor 陈天虎李平史亚丹杨燕
Owner HEFEI UNIV OF TECH
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