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

Reclaimed water deep denitrification and dephosphorization method based on low C/N ratio

A technology for deep denitrification and water regeneration, applied in the field of environmental engineering, can solve the problems of limited carbon content in corn cob, inability to ensure denitrification and denitrification effect, and difficulty in achieving phosphorus removal, etc., and achieves the /N ratio of tail water deep denitrification synchronization. Improved effect of phosphorus removal

Inactive Publication Date: 2016-08-10
BEIJING UNIV OF TECH
View PDF4 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon content inside the corn cob is limited, which cannot guarantee the effect of continuous and efficient denitrification and denitrification, and it is difficult to achieve simultaneous denitrification and denitrification to remove phosphorus

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
  • Reclaimed water deep denitrification and dephosphorization method based on low C/N ratio
  • Reclaimed water deep denitrification and dephosphorization method based on low C/N ratio
  • Reclaimed water deep denitrification and dephosphorization method based on low C/N ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] Test water Add a certain amount of KNO to tap water 3 and KH 2 PO 4 . Control the concentration of TN and TP as follows: ρ(TN)=ρ(NO 3 -N)=35mg.L -1 , ρ(H 2 PO 4 -P)=1.5mg.L -1 . At the same time with 1mol L -1 of hydrochloric acid and 1mol·L -1 Sodium hydroxide solution is used to adjust the pH value of the distribution water to maintain it at 6.8-7.2.

[0027] The reactor is attached figure 1 shown. Among them, the corncob is soaked in NaOH solution with a mass fraction of 1.5% for 10 hours, cut into small rectangles with a length of 2 to 3 cm and a width of 1 to 2 cm; the particle diameter of the sponge iron is 5 to 8 mm, and the particle diameter of the sulfur is 2 to 2 cm. 3mm. The inoculum sludge came from the return sludge of a sewage treatment plant in Beijing.

[0028] In the above implementation mode, the SCSC-S-Fe process is applied to the deep nitrogen and phosphorus removal process of the tail water of the urban sewage treatment plant to enhanc...

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

A reclaimed water deep denitrification and dephosphorization method based on low C / N ratio belongs to the technical field of environmental engineering. A process for composing solid cellulose carbon-sourced ferrous sulfide by coupling sulfur and sponge iron composite through alkali-treated corncobs is simplified as SCSC-S-Fe process. An SCSC-S-Fe process system relies mainly on heterotrophic denitrification to remove nitrogen in water in coordination with sulfur autotrophic denitrification and sponge iron denitrification; in this system, mainly sulfur and sponge iron are chemically reacted to generate FeS, FeS combines with other products generated by sponge iron corrosion such as Fe2+, Fe3+, F36(OH)12(CO3) and FeOOH to convert PO43- into Fe3(PO4)2.xH2O, FePO4 and Fe3(PO4)2(OH)2 precipitates by adsorption precipitation, thus removing phosphorus; the SCSC-S-Fe process is effective in improving reclaimed water deep denitrification and dephosphorization effect at low C / N ratio. The method has a promising application prospect in high-quality reclaimed water treatment.

Description

technical field [0001] The invention relates to a method suitable for deep denitrification and dephosphorization of regenerated water with a low C / N ratio, based on a solid-phase cellulose carbon source corncob coupled with sulfur-iron composite filler to strengthen deep denitrification and dephosphorization, which belongs to the technical field of environmental engineering. Background technique [0002] The urban water resource crisis plagues the harmonious development of the city, and the reuse of reclaimed water is an inevitable way to solve the water resource crisis. Limited by the treatment technology of the existing sewage treatment plant, the effluent of the traditional biological nitrogen and phosphorus removal process still contains a certain concentration of nitrogen and phosphorus. Studies have shown that nitrogen and phosphorus are the controlling factors of eutrophication in most water bodies. For closed waters such as lakes and reservoirs, when the total inorg...

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
CPCC02F3/28C02F2305/06
Inventor 郝瑞霞范军辉朱晓霞万京京李萌
Owner BEIJING 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