A slow-release electron donor and its application for deep denitrification of sewage

An electron donor and slow-release technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high hardness of effluent and consumption of limestone, etc., and achieve stable performance and low pollution The effect of small mud output and easy engineering popularization and application

Active Publication Date: 2019-03-12
北京中持碧泽环境技术有限责任公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sulfur limestone denitrification system consumes a large amount of limestone, resulting in higher effluent hardness

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
  • A slow-release electron donor and its application for deep denitrification of sewage
  • A slow-release electron donor and its application for deep denitrification of sewage
  • A slow-release electron donor and its application for deep denitrification of sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a slow-release electron donor and a method for deep denitrification of sewage by using it. The slow-release electron donor is a complex composed of siderite and sulfur at a volume ratio of 1:1. First, the surface of natural siderite is cleaned with 0.5% dilute hydrochloric acid, ground and crushed into particles with a diameter of 2mm to 5mm, and the surface of sulfur is also cleaned with 0.5% dilute hydrochloric acid, ground and crushed into particles with a diameter of 2mm to 5mm, and then Siderite granules and sulfur granules are uniformly mixed at a volume ratio of 1:1 before use.

[0043]Fill the microporous hollow sphere carrier with the above-mentioned slow-release electron donor to form a biofilter filler. The diameter of the microporous hollow sphere is 20mm, the mesh is 180 mesh, and the material is high-density polyethylene. The filling of the slow-release electron donor It is 90% proportioned and comes in a snap-seal package after f...

Embodiment 2

[0050] Embodiments 2 to 3 respectively provide a slow-release electron donor and a method for deep denitrification of sewage by using the same. Their operations are basically the same as those in Example 1, except that the specifications of sulfur and siderite in the slow-release electron donor are different. Wherein, the siderite and sulfur in embodiment 2 are all particles with a diameter of 0.5 mm to 2 mm, and the siderite and sulfur in embodiment 3 are all particles with a diameter of 0.1 mm to 0.5 mm. Embodiments 2 and 3 The processing result and the comparison with embodiment 1 processing result are as shown in table 1. It can be seen from Table 1 that the smaller the particles of siderite and sulfur, the better the denitrification effect and the higher the pH stability.

[0051] The denitrification effect in the embodiment 2~3 of table 1

[0052]

Embodiment 4

[0054] Embodiments 4 to 8 are also respectively a slow-release electron donor and a method for deep denitrification of sewage by using it. Their operations are basically the same as in Example 1, except that the compounding ratio of sulfur and siderite in the slow-release electron donor is different. Wherein, the slow-release electron donor in Example 4 is a compound composed of siderite and sulfur in a volume ratio of 1:2, and the slow-release electron donor in Example 5 is made of siderite and sulfur in a volume ratio 2:1 composition compound, the slow-release electron donor in embodiment 6 is the complex that is made up of siderite and sulfur by volume ratio 1:10, and the slow-release electron donor in embodiment 7 is made of siderite The complex composed of ore and sulfur at a volume ratio of 1:5, the slow-release electron donor in Example 8 is a complex composed of siderite and sulfur at a volume ratio of 5:1. The processing results of Examples 4-8 and the comparison wit...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a slow-release electron donor and a method for deep denitrification of sewage by using the same. The slow-release electron donor includes a compound composed of siderite and sulfur at a volume ratio of 1:10-5:1. The slow-release electron donor of the invention has wide sources and low price. The method for deep denitrification of sewage provided by the invention has stable efficiency, small sludge output and broad application prospect.

Description

technical field [0001] The invention belongs to the field of deep purification treatment of sewage (waste) water, and in particular relates to a slow-release electron donor and a method for deep denitrification of sewage by using the same. Background technique [0002] Sewage recycling is an effective way to solve the water crisis. At present, urban domestic sewage still contains a certain concentration of nitrogen-containing pollutants after secondary treatment. If there is no deep denitrification treatment, only relying on the self-purification ability of the environment to absorb the nitrogen in the water body will cause a large pollution load and ecological toxicity to the environment. Therefore, the development of a new method for deep denitrification with high efficiency and economy has become a research hotspot in the field of sewage resource utilization. [0003] Traditional denitrification technology needs to consume a large amount of organic matter, but the carbo...

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): C02F3/28C02F3/34
CPCC02F3/2806C02F3/34C02F3/346C02F2003/001C02F2305/06
Inventor 王爱杰朱婷婷程浩毅王鸿程王树森
Owner 北京中持碧泽环境技术有限责任公司
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