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

Biological aerated filter, its construction method and method for treating water with the biofilter constructed by the method

A technology of biological aerated filter and its construction method, which is applied in the field of using double-layer biological aerated filter to domesticate low-temperature nitrifying bacteria to pretreat ammonia nitrogen in water source water, which can solve the problems of unstable operation, aggravated ammonia nitrogen pollution of water source water, and poor ammonia nitrogen removal effect And other issues

Active Publication Date: 2020-05-12
北京市自来水集团有限责任公司技术研究院 +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a method for constructing a low-temperature domesticated aerated organism in view of the existing low-temperature period of water plant water source water ammonia nitrogen pollution aggravated, drinking water biological treatment process has poor ammonia nitrogen removal effect in the low-temperature period, unstable operation and other technical problems. The method for the filter tank, the biological aerated filter tank constructed and the method for treating the water source water of drinking water by the filter tank constructed by the method

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
  • Biological aerated filter, its construction method and method for treating water with the biofilter constructed by the method
  • Biological aerated filter, its construction method and method for treating water with the biofilter constructed by the method
  • Biological aerated filter, its construction method and method for treating water with the biofilter constructed by the method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1 Stable operation at room temperature, lightweight filler-zeolite double-layer biological aerated filter

[0082] The inner diameter of the double-layer biological aerated filter is 100mm, in which: the height of the buffer water distribution area in the lower layer of the filter is 0.2m; the lower filter layer is a light filler (polyethylene) layer with a height of 1m (usually 1-2.5m, preferably 1- 1.5m, taking 1m as an example in the embodiment of the present invention), the filling rate of light filler is 80% (usually 80-90%), and the bulk density is 150kg / m 3 ; The porous filter interlayer is composed of a porous filter plate and a pebble layer with a particle size of 3-6mm fixedly placed on the upper part of it, and the height is 0.2m. The layer is laid from the bottom to the top in the order of the particle size; the upper filter layer It is a zeolite filter layer with a zeolite particle size of 1 to 3 mm, a zeolite packing height of 1 m (usually 1 to 1.5 m, ...

Embodiment 1A

[0091] Example 1A In situ domestication of low-temperature nitrifying bacteria

[0092] Water quality of the source water to be treated:

[0093]

[0094]

[0095] In this embodiment, the ammonia nitrogen concentration of the source water to be treated is described by taking 1.7 mg / L as an example, and other source waters ≤ 4 mg / L are suitable for the present invention.

[0096] To the stable double-layer biological aerated filter (light-weight filler-zeolite double-layer biological aerated filter) in Example 1, the temperature was maintained at 3°C ​​(usually at 1 to 5°C). The source water to be treated flows into the water distribution area from the bottom of the double-layer biological aerated filter through the inlet pipe, and runs upward; for aeration, the air-water ratio is 2.5:1 (usually 2:1~3:1), hydraulic retention For 60 minutes (usually 30-60 minutes), the mixed flow of gas and water passes through the lower lightweight filler filter layer, the middle porous filter plate ...

Embodiment 2

[0100] Example 2 Rapid domestication of low-temperature nitrifying bacteria

[0101] 1. Prepare backwash concentrate

[0102] In the process of backwashing the stable running lightweight filler-zeolite double-layer biological aerated filter in Example 1, the backwash water was collected, and the ratio of the amount of backwash water to the volume of the filter was 2.5:1 ( Usually 1.5-3:1); then the collected backwash water is placed at room temperature (20-30℃) for 20-30min, the supernatant is removed, and the lower backwash concentrate is obtained, where the backwash concentrate and The volume ratio of the collected backwash water is 10:100 (usually 10-20:100).

[0103] The backwashing of the biological filter of the present invention is described by taking the method of first air washing, then air-water combined washing, and then water washing as an example, and other methods of backwashing are also applicable to the present invention.

[0104] 2. The first low-temperature inductio...

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
densityaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a construction method of a BAF (biological aerated filter), the BAF and a method for treating water by using the BAF. The construction method comprises the steps as follows: backwashing water of the BAF is collected and concentrated at the low temperature, then, the concentrated solution is subjected to primary low-temperature acclimation culture, and a proliferation culture solution is obtained; the proliferation culture solution is added to the BAF for airtight aeration treatment; then, source water is introduced into the BAF for secondary low-temperature acclimationculture. In the constructed BAF, the ecological niche advantage of low-temperature nitrifying bacteria in the system is outstanding, and ammonia-nitrogen pollution to the source water at the low temperature stage is effectively controlled. The BAF is stable in operation, low in energy consumption, applicable to both low temperature stage and normal temperature stage and high in ammonia nitrogen removal rate; the BAF is applicable to treatment of source water with ammonia and nitrogen as main pollutants at the low temperature and the treatment safety of drinking source water is guaranteed. Theproblem of high difficulty in removing ammonia and nitrogen with a drinking water treatment process in winter, particularly at the low temperature in the north is solved.

Description

Technical field [0001] The invention relates to a method for treating source water, in particular to a method for pretreating ammonia nitrogen in source water by using a double-layer biological aerated filter to domesticate low-temperature nitrifying bacteria. Background technique [0002] BAF-Biological Aerated Filters, also called submerged biological aerated filters (SBAF-Submerged Biological Aerated Filters), are used in ordinary biological filters, high-load biological filters, biological filter towers, and biological contact oxidation methods. Developed on the basis of other biofilm methods, it is called The Third Generation Filter (The Third Generation Filter), which has the ability to remove SS, COD, BOD, nitrification, nitrogen removal, phosphorus removal, and AOX (harmful substance) removal effect. Biological aerated filter is a new process integrating biological oxidation and retention of suspended solids. Foreign countries began to conduct research in the 1920s and ...

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): C02F3/02C02F3/10C02F3/34C02F101/16
CPCY02W10/10
Inventor 韩梅曹曦催福义
Owner 北京市自来水集团有限责任公司技术研究院
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