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

Solid slow-release carbon source for biological denitrification nitrogen removal and preparation method thereof

A slow-release carbon source, nitrification and denitrification technology, which is applied in the field of water treatment, can solve the problems of poor slow-release effect and achieve the effect of low cost, wide source of raw materials and low price

Pending Publication Date: 2020-06-09
CHINA URBAN CONSTR DESIGN & RES INST CO LTD +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of poor slow-release effect of organic carbon source in the current enhanced biological denitrification denitrification, the present invention provides a new slow-release carbon source for biological denitrification denitrification. will cause secondary pollution

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
  • Solid slow-release carbon source for biological denitrification nitrogen removal and preparation method thereof
  • Solid slow-release carbon source for biological denitrification nitrogen removal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Preparation of solid slow-release carbon source

[0025] (1) Add 10 g of potato starch and 30 g of polysulfone into an Erlenmeyer flask filled with 60 mL of dimethylacetamide, and put them in a water bath at 80°C and stir for 24 h to mix the starch and polysulfone evenly. Then pour the above solution into a mold with a side length of 1.5 cm, and then immerse the mold in deionized water for 1 hour to obtain a carbon source with a preliminary shape;

[0026] (2) The above-mentioned carbon source was immersed in deionized water for 2 days to complete the phase inversion process. The deionized water was replaced every day, and then the carbon source was taken out and dried at 60°C for 2 h to obtain sample No. 1, which was stored in an oxygen barrier for later use;

[0027] Samples No. 2 (starch: polysulfone = 1:1, 40 g) and No. 3 (starch: polysulfone = 3:1, 40 g) were prepared in the same way. Different samples were prepared such as figure 1 Shown: a is sample N...

Embodiment 2

[0028] Example 2 The removal effect of solid slow-release carbon source on nitrate nitrogen

[0029] Add 10 g of No. 1, No. 2 and No. 3 carbon sources into a 500 mL Erlenmeyer flask and add 500 mL of synthetic waste water (50 mg / L NO 3 - -N, 1 mg / L TP) and activated sludge with a final concentration of 800 mg / L. Place the flask in a shaking incubator set at 80 rpm and 25 °C. Take water samples every 24 hours for COD, NO 3 - -N and NO 2 - -N concentration measurement and at the same time replace the synthetic waste water in the flask.

[0030] Referring to "Water and Wastewater Monitoring and Analysis Methods" (Editorial Committee of "Water and Wastewater Monitoring and Analysis Methods" of the State Environmental Protection Administration. Water and Wastewater Monitoring and Analysis Methods [M]. 4th Edition. Beijing: China Environmental Science Press, 2002), NO was measured at 220 nm and 275 nm with a UV spectrophotometer (Shimadzu UV-3100) 3 - -N, use naphthalene et...

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 provides a preparation method of a solid slow-release carbon source for biological denitrification nitrogen removal. The preparation method comprises the following steps: dispersing starch and polysulfone into dimethylacetamide, heating, stirring and uniformly mixing, pouring into a mold, and immersing into water for molding; and immersing the preliminarily formed carbon source intowater, and drying after phase inversion is completed to obtain the product. The preparation method is simple and convenient, high in operability and low in cost. The slow-release carbon source provided by the invention has a good carbon source controlled release effect, does not cause secondary pollution in enhanced denitrification, and has a wide application prospect in removal of nitrate in secondary effluent of urban sewage plants.

Description

technical field [0001] The invention belongs to the field of water treatment and relates to a preparation method of a solid slow-release carbon source for biological denitrification and denitrification. Background technique [0002] Excessive nitrogen content in water can easily lead to eutrophication, which has become a worldwide problem and seriously threatens ecological balance and human health. In China, nearly two-thirds of the country's lakes are moderately or severely degraded due to nitrogen pollution. In sensitive areas of aquatic ecology, the concentration of TN is limited below 10.0 mg / L. The removal of total nitrogen (TN), namely ammonia nitrogen, nitrate nitrogen, and nitrite nitrogen in wastewater has become one of the most important and urgent issues. To solve this problem, various techniques have been used, including ion exchange, adsorption, membrane separation, electrodialysis, and biological denitrification. Among them, denitrification and denitrificati...

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 Applications(China)
IPC IPC(8): C02F3/28C02F3/34
CPCC02F3/28C02F3/34C02F2305/04C02F2209/16C02F2209/08
Inventor 王全勇张克峰丁万德彭锦玉刘欢
Owner CHINA URBAN CONSTR DESIGN & RES INST CO LTD
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