Biofilm reactor and method for sewage efficient denitrification

A biofilm reactor, a high-efficiency technology, applied in chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve the problem that it is difficult to further improve the denitrification capacity, the effluent is difficult to meet the standard stably, and the carbon source is not fully utilized. problems, to achieve the effects of a wide range of treated water, improved utilization of dissolved oxygen, and efficient full-process treatment

Pending Publication Date: 2019-03-19
TSINGHUA BERKELEY SHENZHEN INST
View PDF16 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention proposes a process and device for biological denitrification of sewage by biofilm method with simple process and small footprint, which solves the difficulty of further improving the denitrification capacity of the traditional biological denitrification process (AAO), insufficient utilization of carbon sources, and poor process flow. Problems such as long length, large floor area, and difficulty in meeting water standards stably

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
  • Biofilm reactor and method for sewage efficient denitrification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 A biofilm reactor for efficient denitrification of sewage

[0032] Such as figure 1 As shown, a biofilm reactor for efficient denitrification of sewage, which includes: water inlet pipe 1, anoxic reaction zone 2, aerobic reaction zone 3, outlet pipe 4, and connection, and return pipe 5, in the aerobic reaction The back end of the zone is connected to the return pipe to make the reaction liquid return to the anoxic reaction zone; in the anoxic reaction zone, there are stirrers 6, limit suspension carriers 7 and layering devices 8; in the aerobic reaction zone, there are array fiber carriers 9 And aeration device 10.

[0033] Among them, the anaerobic reaction zone is filled with suspended filler, and is divided into multiple layers by a partition with holes to limit the filler to a certain area.

[0034]Among them, the upper and lower ends of the array fiber carrier in the aerobic reaction zone are fixed on the top and bottom of the reactor respectively, so t...

Embodiment 2

[0035] Example 2 A biofilm reactor for efficient denitrification of sewage

[0036] On the basis of Example 1, the anaerobic reaction zone is filled with suspended fillers, and is divided into multiple layers (3-5 layers) with a partition with holes. The filler in the anaerobic reaction zone is K-3 filler, and the specific surface area> 800m 2 / m 3 , The distribution rate can reach more than 60%.

[0037] The array fiber carrier in the aerobic reaction zone adopts flexible fiber filler. The main material is aldehyde fiber, and the packing density can reach 50m / m 3 .

[0038] An aeration device is installed at the bottom of the aerobic reaction zone, and step aeration is adopted to divide the aerobic zone into three zones with different aeration intensity.

Embodiment 3

[0040] A treatment method for high-efficiency biological denitrification, using the aforementioned embodiment 2 biofilm reactor for domestic sewage treatment, including:

[0041] (1) Sewage enters the anoxic reaction zone from the water inlet pipe, and the anoxic reaction zone is filled with suspended fillers, and is divided into 5 layers with perforated partitions to limit the fillers to a certain area, so that different biological communities can be formed in different areas Controlled biofilm, and use mechanical stirring to ensure that the filler is evenly distributed in this area;

[0042] (2) After the sewage is treated in the anoxic reaction zone, it enters the aerobic reaction zone. The aerobic reaction zone uses flexible fiber filler, the main material is aldehyde fiber, and the packing density can reach 50m / m 3 ; Fix the upper and lower ends of the reactor on the top and bottom of the reactor respectively, so that it forms a cross-flow array structure with the water f...

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 belongs to the technical field of sewage treatment and in particular relates to a biofilm reactor and method for sewage efficient denitrification. The biofilm reactor comprises a water inlet pipe 1, an anoxia reaction region 2, an aerobic reaction region 3, a water outlet pipe 4 and a reflowing pipe 5, wherein the anoxia reaction region is internally provided with a stirrer 6, a limiting suspension carrier 7 and a layering device 8; and the aerobic reaction region is provided with an array fiber carrier 9 and an aeration device 10. The invention provides a biofilm-process sewagebiological denitrification process and device which have the advantages of simple technology and small occupied area, and the problems that the denitrification capability of a traditional biological denitrification technology (AAO) is difficult to improve, a carbon source is not sufficiently utilized, a flow is relatively long, the occupied area is relatively large, output water cannot stably reach standards and the like are solved. The aims of sufficiently utilizing the carbon source, reducing the staying time and enabling the output water to stably reach the standards are realized through optimizing filler shapes and arrangement manners of the anoxia reaction region and the aerobic reaction region.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a biofilm reactor and a method for efficiently denitrifying sewage. Background technique [0002] With the rapid development of urbanization in China, the problem of urban water pollution is becoming increasingly serious. At present, traditional urban sewage treatment plants can effectively remove organic pollutants such as COD, but the secondary effluent often contains a certain concentration of nutrients such as nitrate nitrogen and phosphorus, which is difficult to meet the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002 ) Standard Class A Standard ("15MG-N / L), if it is directly discharged into rivers and lakes, it will cause the risk of eutrophication of the water body. [0003] At present, the most widely used sewage denitrification treatment technology is the activated sludge denitrification process based on anoxic-aerob...

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): C02F3/30C02F101/16
CPCC02F3/301C02F3/302C02F2101/16
Inventor 李晓岩林琳李若泓李谱李炳郭学超孙文郡李颖瑜
Owner TSINGHUA BERKELEY SHENZHEN INST
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