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GB/T 45141-2025 English PDF

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GB/T 45141-2025: Test method for modified fouling index of reverse osmosis feed water
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Basic data

Standard ID GB/T 45141-2025 (GB/T45141-2025)
Description (Translated English) Test method for modified fouling index of reverse osmosis feed water
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A45
Classification of International Standard 07.060
Word Count Estimation 10,151
Date of Issue 2025-01-24
Date of Implementation 2025-08-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 45141-2025: Test method for modified fouling index of reverse osmosis feed water

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 07.060 CCSA45 National Standard of the People's Republic of China Determination method of corrected pollution index of reverse osmosis influent Released on 2025-01-24 2025-08-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Foreword

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. 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 is proposed by the Ministry of Natural Resources of the People's Republic of China. This document is under the jurisdiction of the National Technical Committee for Marine Standardization (SAC/TC283). This document was drafted by. Tianjin Seawater Desalination and Comprehensive Utilization Research Institute of the Ministry of Natural Resources, Wharton Technology Co., Ltd., Bluestar (Hangzhou) Membrane Industry Co., Ltd., Shandong Seawater Desalination and Comprehensive Utilization Industry Research Institute. The main drafters of this document are. Li Xiaoming, Zhang Huifeng, Liu Guochang, Zhu Lei, Wang Jian, Liu Zheng, Feng Houjun, Jin Yan, Tan Huifen, Chen Jinbin, Kang Quan. Determination method of corrected pollution index of reverse osmosis influent

1 Scope

This document specifies the principle, microporous membrane requirements, instrumentation, test procedures, and test methods for determining the modified contamination index (MFI0.45) of reverse osmosis membrane influent. steps, data processing, precision and test reporting. This document is applicable to the determination of the corrected contamination index of reverse osmosis membrane influent.

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 to This document. GB/T 6672 Plastic film and sheet thickness determination mechanical measurement method GB/T 32361-2015 Test method for separation membrane pore size - Bubble point and average flow method GB/T 32373-2015 Reverse Osmosis Membrane Test Method HY/T 053-2001 Microporous Filter Membrane HY/T 0429-2024 Polytetrafluoroethylene hollow fiber microporous membrane

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Modified Fouling Index The linear slope of the filtration time and cumulative water production per unit water production of 0.45 μm microporous membrane was calculated to evaluate the reverse osmosis membrane water inflow. Technical indicators for the content of pollutants such as particles, colloids, and microorganisms. 3.2 Deadend filtration Dead-end filtration A mode of operation in which all of the solvent is forced through the membrane.

4 Principle

The membrane full-volume filtration method is used. Due to the formation of irreversible compression filter cake/gel layer, the membrane pores are blocked or reduced, resulting in the microporous membrane permeability. The MFI0.45 is calculated based on the linear relationship between the filtration time per unit water output of the membrane and the cumulative water output, which is used to evaluate the effect of influent on reverse osmosis. The degree of membrane contamination. 5.Microporous membrane requirements 0.45μm polyethersulfone flat microporous filter membrane, its performance requirements and test methods are shown in Table 1.

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