Standard No.:	HG/T 3923-2007
English Name:	Reusing wastewater quality standard for industrial circulating cooling water
Chinese Name:	循环冷却水用再生水水质标准
Chinese Classification:	G76    Basic standards and general methods for water treatment agent
Professional Classification:	HG    Professional Standard - Chemistry
ICS Classification:	13.060.25 13.060.25    Water for industrial use 13.060.25
Issued by:	NDRC
Issued on:	2007-4-13
Implemented on:	2007-10-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	1500 words
Price(USD):	45.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the quality index of reusing wastewater as circulating cooling water. This standard is applicable to make-up water with reusing wastewater as circulating cooling water. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition applies. GB/T 7488 Water quality - Determination of biochemical oxygen demand after 5 days (BOD5) - Dilution and seeding method (GB/T 7488-1987, neq ISO 5815: 1983) GB/T 14415 Analysis of water used in boiler and cooling system - Determination of solids matter GB/T 14643.1 Industrial circulating cooling water - Examination of bacteria formed deposits - Standarde of plate count GB/T 15451 Industrial circulating cooling water - Determination of alkalinity GB/T 15452 Industrial circulating cooling water - Determination of calcium and magnesium - EDTA titration method (GB/T 15452-1995, neq ISO 6058:1984) GB/T 15453 Industrial circulating cooling water - Determination of chloride - Silver nitrate titration method (GB/T 15453-1995, neq ISO 9297:1989) GB/T 15456 Industrial circulating cooling water - Determination of the chemical oxygen demand - Potassium permanganate method (GB/T 15456-1995, neq ISO 8467:1986) GB/T 15893.1 Industrial circulating cooling water - Determination of turbidity - Diffused radiation method (GB/T 15893.1-1995, neq ISO 7027:1990) GB/T 15893.2 Industrial circulating cooling water - Determination of pH - Electrometric method GB/T 17133 Water quality - Determination of sulfide - Direct development of the spectrophotometry HG/T 3539 Industrial circulating cooling water - Determination of iron - Spectrometric method using 1,10-phenant HG/T 3540 Industrial circulating cooling water - Determination of phosphorus - Ammonium molybdate spectrophotometric method

Foreword i 1 Scope 2 Normative references 3 Technical requirements 4 Water quality identification