Search result: GB/T 44376.1-2024
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Fine bubble technology - Water treatment applications - Part 1: Test method for evaluating ozone fine bubble water generating systems by the decolorization of methylene blue
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GB/T 44376.1-2024
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| Standard ID | GB/T 44376.1-2024 (GB/T44376.1-2024) | | Description (Translated English) | Fine bubble technology - Water treatment applications - Part 1: Test method for evaluating ozone fine bubble water generating systems by the decolorization of methylene blue | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A21 | | Classification of International Standard | 19.020 | | Word Count Estimation | 24,296 | | Date of Issue | 2024-08-23 | | Date of Implementation | 2024-08-23 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 44376.1-2024
Fine bubble technology - Water treatment applications - Part 1.Test method for evaluating ozone fine bubble water generating systems by the decolorization of methylene blue
Micro bubble technology water treatment application
Part 1.Evaluation of the methylene blue decolorization method
Ozone fine bubble water generation system
Fine bubble technology-Water treatment applications-
Part 1.Test method for evaluating ozone fine bubble water generating systems
by the decolorization of methylene blue
(ISO 20304-1.2020, MOD)
ICS 19.020
CCS A 21
National Standard of the People's Republic of China
Published on August 23, 2024, implemented on March 1, 2025
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface ··· Ⅲ
Introduction ··· V
1 Scope ···· 1
2 Normative references ···· 1
3 Terms and Definitions ···· 1
4 Ozone fine bubble water decolorization experiment ···· 2
4.1 Principle 2
4.2 Test environment conditions ···· 2
4.3 Test Equipment 2
4.4 Raw gas supply unit (Unit A) ···· 3
4.5 Ozone generator unit (Unit B) ··· 3
4.6 Ozone Chemical Reaction Unit (C Unit) ···· 4
4.7 Residual ozone tail gas treatment unit (D unit) ···· 4
4.8 Experimental Reagents ···· 5
4.9 Test Steps 5
5 Decolorization effect test results ···· 5
5.1 Evaluation Object 5
5.2 Evaluation Process 5
5.3 Uncertainty evaluation 7
6 Test Report ··· 7
Appendix A (Informative) Structure Number Comparison Table ···· 8
Appendix B (Informative) Examples of absorbance test results of different test systems at different ozone dosages ··· 10
References ··· 13
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting is required.
This document is part 1 of GB/T 44376 "Application of Microbubble Technology in Water Treatment". GB/T 44376 has been published as follows
part.
Part 1.Evaluation of ozone fine bubble water generation system by methylene blue decolorization method.
This document is modified to adopt ISO 20304﹘1.2020 "Application of microbubble technology in water treatment - Part 1.Evaluation of methylene blue decolorization method"
Price ozone fine bubble water generation system.
Compared with ISO 20304﹘1.2020, this document has many structural adjustments. A list of structural number changes between the two documents
See Appendix A for the table.
The technical differences between this document and ISO 20304﹘1.2020 and their reasons are as follows.
GB/T 41914.1 replaced ISO 20480﹘1 (see Chapter 3, Chapter 3 of ISO 20304﹘1.2020) to adapt to my country
Technical conditions to improve operability;
The definition of the term "fine sparkling water" (see 3.1, 3.1 of ISO 20304﹘1.2020) has been changed to adapt to the technical requirements of my country.
condition;
Added the terms and definitions "ozone concentration" and "ozone dosage" (see 3.5 and 3.6) to improve operability; -
Added explanation of the principle of ozone decolorization and suggestions on reducing the influence of bubbles on measurement (see 4.1) to improve the understanding of this document.
Improve operability;
The recommendation to use an online absorbance meter (see 4.1 of ISO 20304﹘1.2020) has been deleted to improve operability.
Sexuality;
The temperature of the test chamber has been changed (see 4.2 of ISO 20304﹘1.2020) to improve operability;
The “circulation pump and measuring instrument unit for online measurement” (see 4.6 of ISO 20304﹘1.2020) was deleted and the “circulation pump and measuring instrument unit for online measurement” was added
“Ozone Bypass Detection Unit” (see Figure 1) to improve operability;
Change "residual ozone treatment unit" to "residual ozone tail gas treatment unit" (see 4.3, 4.7, ISO 20304﹘1.
4.3 and 4.7 of 2020), which are more in line with domestic expressions;
Added instructions for the selection of reaction conditions and gas flowmeter during the test [see 4.5 a) and 4.9 f)] to apply to offline
Measurement to improve operability;
The requirements for ozone flow rate have been changed [see 4.5 a), 4.5 a) of ISO 20304﹘1.2020], and the requirements for ozone concentration have been added.
See 4.5 a)], added the corresponding operation steps for ozone bypass detection [see 4.5 a)] and the treatment measures before the experimental solution test
[See 4.5 c)] to improve operability;
The description of the gas pressure gauge [see 4.5 a) and 4.9 e) of ISO 20304﹘1.2020] has been deleted to adapt to the technical requirements of my country.
Item;
Added the operation steps of stirring and fixing the sampling points during the experiment [see 4.6 b)], changed the number of sampling points, the experimental weight,
The number of replicates, sampling requirements, and blank control group [see 4.6 c), 4.6 h of ISO 20304﹘1.2020)] are required to improve operability.
Sexuality;
The description of the circulation pump for absorption measurement [see 4.6 g of ISO 20304﹘1.2020)] has been deleted to improve operability;
GB/T 41914.2﹘2022 replaces ISO 20480﹘2.2018 [see 4.8 a), 4.6 c) of ISO 20304﹘1.2020],
To adapt to my country's technical conditions and improve operability;
The quality of the methylene blue powder for preparing the mother solution [see 4.8 c), 4.6 e) of ISO 20304﹘1.2020] and the acidity and alkalinity of the solution have been changed.
The range of degrees [see 4.8 d), 4.6 f) of ISO 20304﹘1.2020] to improve operability;
Change the "change of absorbance over time" in the evaluation object to "the absorbance of the test solution changes with the increase of ozone dosage"
"(see 5.1, 5.1 of ISO 20304﹘1.2020) to improve operability;
Change the evaluation from the change of concentration over time to the change of concentration over the ozone dosage (see 5.2,
ISO 20304﹘1.5.2 of 2020) to improve operability;
Added the calculation formula of ozone dosage [see 5.2 b)] to improve operability; -
Replace the horizontal axis with the ozone dosage and the experimental data (see Figure 2, Figure 2 of ISO 20304﹘1.2020),
To adapt to the technical conditions of our country;
Added the requirement for goodness of fit R2 in the fitting curve [see 5.2 e)] to improve operability; -
Added experimental record of decolorization effect. Added ozone dosage and ozone standard flow rate at half-life t1/2 in the experimental description [see Chapter 6
f)] to improve operability;
The characteristics of fine bubbles (size and number concentration of fine bubbles) have been deleted [see Chapter 6 and
h) of Chapter 7] to adapt to my country's technical conditions and improve operability.
The following editorial changes were made to this document.
GB/T 35804 replaces the informative reference ISO 1431﹘3; -
The informative appendixes A and B of ISO 20304﹘1.2020 were deleted, and informative appendix B “Different test systems in different
Example of absorbance test results at the same ozone dosage".
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the Chinese Academy of Sciences.
This document is under the jurisdiction of the National Technical Committee for Standardization of Microbubble Technology (SAC/TC 584).
This document was drafted by. Shanghai Advanced Research Institute of the Chinese Academy of Sciences, Anhui Hengyu Environmental Protection Equipment Manufacturing Co., Ltd., Nanjing Tianqi Super
Oxygen Technology Co., Ltd., Baowu Water Technology Co., Ltd., National Center for Nanoscience and Technology, Tongji University, Shanghai Institute of Applied Physics, Chinese Academy of Sciences
Institute, Wuhan University of Technology, Taizhou Juna New Energy Co., Ltd., Xi'an University of Architecture and Technology, East China University of Science and Technology, Kunming Shuixiao Technology Co., Ltd.
Co., Ltd., Ningbo Haibo Group Co., Ltd.
The main drafters of this document are. Zhang Lijuan, Wang Biao, Lan Qingquan, Li Enchao, Zhou Lan, Li Pan, Li Jixiang, Guan Nan, Li Zhaojun,
Yang Siyuan, Ding Rong, Wang Ruiqi, Xiao Wei, Liu Bo, Wang Xingya, Liu Mu, Tong Min, Xia Shaohua.
introduction
Ozone is often used to improve water quality, such as decomposing and decolorizing substances in water that are difficult to purify and decompose. The conventional method is to use porous
Tube/sheet system. However, research has found that using fine ozone bubbles may help to more effectively utilize the strong oxidizing properties of ozone.
In recent years, the development of micro-bubble generation technology has made the utilization efficiency of ozone higher than that of porous tube/plate systems. The improvement in efficiency helps
Reduce costs.
Decolorization is mainly used to treat factory wastewater, recycled water and sewage. In addition, decolorization is also a routine operation in sewage treatment facilities, such as
For deep treatment of printing and dyeing wastewater, etc.
GB/T 44376 "Application of Micro-bubble Technology in Water Treatment" aims to provide a general reference for the application of micro-bubble technology in water treatment.
It is intended to be composed of two parts.
Part 1.Evaluation of ozone fine bubble water generation system by methylene blue decolorization method.
Test method for performance of ozone fine bubble water generating system.
Part 2.Test method using Escherichia coli as a test microorganism. The purpose is to establish the use of Escherichia coli as a test microorganism
Test method for evaluating the bactericidal activity of fine bubble water produced by hydrodynamic cavitation.
Micro bubble technology water treatment application
Part 1.Evaluation of the methylene blue decolorization method
Ozone fine bubble water generation system
WARNING—Persons using this document should be familiar with normal laboratory operations. This document does not purport to address all safety concerns associated with its use.
It is the user's responsibility to establish appropriate safety and health practices and to determine any other applicable limitations.
1 Scope
This document describes the method for evaluating the performance of ozone fine bubble water generating systems for the decolorization of water-soluble dyes in wastewater and industrial water.
This document does not address the health and environmental effects of ozone.
This document applies to the evaluation of the performance of ozone fine bubble water generation systems for the decolorization of water-soluble dyes in wastewater and industrial water.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies.
in this document.
GB/T 41914.1 Microbubble technology Microbubble use and measurement general rules Part 1.Terminology (GB/T 41914.1-2022,
ISO 20480﹘1.2017,IDT）
GB/T 41914.2-2022 Microbubble technology - General rules for the use and measurement of microbubbles - Part 2.Classification of microbubble properties
(GB/T 41914.2-2022, ISO 20480﹘2.2018, MOD)
ISO 10678 Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of photocatalytic activity of surfaces in aqueous media by methylene blue degradation
Activity [Fine ceramics (advanced ceramics, advanced technical ceramics)-Determination of photocata﹘
lytic activity of surfaces in an aqueous medium by degradation of methylene blue]
3 Terms and definitions
The terms and definitions defined in GB/T 41914.1 and the following apply to this document.
The terminology bases maintained by ISO and IEC for standardization work are as follows.
3.1
Fine bubble water
Water containing fine bubbles.
3.2
ozone fine bubble water
Water containing fine bubbles of ozone.
3.3
Absorbance
The natural logarithm of the ratio of the incident light intensity to the outgoing light intensity for testing water-soluble dyes.
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