Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation and application of a sulfur autotrophic and heterotrophic denitrification biofiller

A technology of heterotrophic denitrification and biological filler, which is applied in the field of advanced wastewater treatment and reuse, can solve the problems of difficult further improvement of treatment efficiency, uneven distribution of biofilm, long time of biofilm formation, etc., and achieve denitrification and operation effect Stabilize, enhance the population richness, and facilitate the effect of attachment growth

Active Publication Date: 2021-09-28
NANJING UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] At the same time, the present invention uses the above-mentioned biological filler in the denitrification treatment of wastewater, while ensuring the treatment efficiency, to overcome the long time and low treatment efficiency of the existing denitrification, sulfur autotrophic and heterotrophic coupling denitrification water treatment technology. It is difficult to further improve, uneven distribution of biofilm, secondary pollution of effluent, high sulfate radicals in effluent, stratification of fillers, etc.

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
  • Preparation and application of a sulfur autotrophic and heterotrophic denitrification biofiller
  • Preparation and application of a sulfur autotrophic and heterotrophic denitrification biofiller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] like figure 2 As shown, this embodiment provides a sulfur autotrophic and heterotrophic denitrification and denitrification biological filler, which is a sulfur-modified ceramsite with sulfur loaded on the surface, and the sulfur combines with Si and O elements on the surface of the ceramsite to form Si -O-S, the Si-O-S are cross-linked with each other to form a grid structure. In the present embodiment, the preparation method of sulfur-modified sulfur autotrophic and heterotrophic denitrification and denitrification biological fillers is as follows:

[0058] (1) Alkali modification:

[0059] The primary ceramsite is soaked with potassium hydroxide solution, and washed with water after soaking to obtain alkali-modified ceramsite;

[0060] (2) Sulfur load:

[0061] Disperse the alkali-modified ceramsite in the petroleum ether solvent, slowly add disulfide dichloride, heat and stir, after the reaction is completed, the sulfur-loaded sulfur-modified ceramsite is obtain...

Embodiment 2

[0063] This embodiment provides a sulfur autotrophic and heterotrophic denitrification and denitrification biological filler, and the biological filler is a sulfur-modified ceramsite that has been sequentially treated with alkali modification and sulfur loading.

[0064] In the present embodiment, the preparation methods of sulfur autotrophic and heterotrophic denitrification and denitrification biological fillers are as follows:

[0065] (1) Firing:

[0066] Add the binder calcium-based bentonite to the dewatered sludge and clay of the ceramsite raw materials to prepare raw meal powder, make the raw meal powder into raw meal balls, and roast the raw meal balls at high temperature to obtain primary ceramsite; The mass ratio of raw material to binder is 20:1.

[0067] (2) Alkali modification:

[0068] The primary ceramsite was soaked with potassium hydroxide solution with a mass concentration of 2%, and washed with water after soaking to obtain alkali-modified ceramsite;

[...

Embodiment 3

[0074] This embodiment provides a biological filler, and the biological filler is a sulfur-modified ceramsite that has been sequentially treated with alkali modification and sulfur loading.

[0075] In the present embodiment, the preparation methods of sulfur autotrophic and heterotrophic denitrification and denitrification biological fillers are as follows:

[0076] (1) Firing:

[0077] The binder sodium bentonite is added to the ceramsite raw material fly ash and garbage residue to prepare raw meal powder, the raw meal powder is made into raw meal balls, and the raw meal balls are calcined at high temperature to obtain primary ceramsite; The mass ratio of raw material to binder is 25:1.

[0078] (2) Alkali modification:

[0079] The primary ceramsite was soaked with potassium hydroxide solution with a mass concentration of 3%, and washed with water after soaking to obtain alkali-modified ceramsite;

[0080] (3) Sulfur load:

[0081] Disperse the alkali-modified ceramsite...

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 diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses the preparation and application of a sulfur autotrophic and heterotrophic denitrification denitrification biological filler, which increases the number of micropores and silicon hydroxyl groups on the surface of ceramsite by alkali etching, and then uses highly active disulfur dichloride to Alkali-modified ceramsite surface is activated. Disulfur dichloride can chemically bond with the hydroxyl functional groups on the ceramsite surface, so that sulfur can be loaded onto the ceramsite surface to form Si-O-S and cross-link to form a stable network. structure. The sulfur autotrophic and heterotrophic denitrification biofiller provided by the present invention can realize the coupling of sulfur autotrophy and heterotrophic denitrification, which is beneficial to the attachment and growth of microorganisms, reduces the addition of carbon sources, improves the richness of populations, and makes The denitrification efficiency is further improved, and the effluent water quality is stable.

Description

technical field [0001] The invention belongs to the technical field of advanced treatment and reuse of wastewater, and more particularly relates to the preparation and application of a sulfur autotrophic and heterotrophic denitrification and denitrification biological filler Background technique [0002] Nitrogen pollution in water has become one of the main problems threatening the water quality in my country. High nitrogen content causes water eutrophication and water environment quality degradation, which threatens people's health. Biological denitrification is widely used in deep denitrification because of its high efficiency and low cost. The secondary effluent deep denitrification processes of sewage plants mainly include biological filter, activated sludge method, advanced oxidation method and artificial wetland. Among them, the denitrification biological filter has the advantages of small footprint, high denitrification efficiency, strong adsorption and filtration, e...

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): C02F3/34C02F3/28C04B33/132C04B33/13C04B38/00C04B41/85C04B41/91
CPCC02F3/2806C02F3/34C02F2209/16C02F2209/19C04B33/13C04B33/132C04B33/1321C04B33/1352C04B38/009C04B41/4584C04B41/50C04B41/5353C04B41/85C04B41/91Y02P40/60
Inventor 刘波程绍举侯玉倩张陈永王梦良杜凌峰
Owner NANJING UNIV
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