T/SCSKJQYLHH 28-2024 Active Group standards

T/SCSKJQYLHH 28-2024 The fast treatment specifications for azo dyes in printing and dyeing wastewater

Publish Date: 2024-12-05 Implement Date: 2025-01-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/SCSKJQYLHH 28-2024

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Integrated Environment and Environmental Protection

Publish Date: 2024-12-05

Implement Date: 2025-01-01

Scope

Main technical content: 5.1 Processing flow: 5.1.1 Adjust the pH value of the aqueous solution containing azo dyes to be processed; 5.1.2 Pass the aqueous solution containing azo dyes through the reactor device at a constant speed, where it reacts with a magnetic reaction medium system containing zero-valent iron; 5.1.3 After adjusting the pH of the aqueous solution to neutral, discharge it. 5.2 Key points of processing: 5.2.1 Mix micron-sized zero-valent iron with a certain proportion of filling medium and fill it into the column. Water enters the column from the lower inlet and exits from the upper outlet. 5.2.2 Before starting the processing, turn on the peristaltic pump (preheated for about 30 minutes) and adjust the speed to 1 r/min as needed. 5.2.3 Use a 0.1 mol/L NaOH or HCl solution to adjust the pH to 3.0–7.0. If the pH of the aqueous solution already meets the requirements, no further adjustment is needed. 5.2.4 Turn on the magnetic field with an external magnetic field strength of ≤20 mT.