GB/T 21796-2008 Replaced National standards

GB/T 21796-2008 Chemicals—Activated sludge,respiration inhibition test

Publish Date: 2008-05-12 Implement Date: 2008-09-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 21796-2008

Standard Type: National standards

Standard Status: Replaced

is_force_gb: no

CCS Name: Logo, packaging, transportation, storage

ICS Name: Pollution, pollution control, and protection

Publish Date: 2008-05-12

Implement Date: 2008-09-01

Pages: 6 pages

Scope

This standard specifies the method outline, test preparation, test procedure, quality assurance and quality control, data and reporting for the respiration inhibition test of chemical substances in activated sludge. This standard is applicable to most water-soluble, low-volatile, and easily retained substances in water bodies; it is not applicable to substances that may decompose through phosphorylation under oxygen action. For substances with limited water solubility, it may not be possible to determine the half-effective concentration. This standard provides a rapid screening method to identify which substances may have adverse effects on aerobic microorganisms in wastewater treatment plants, and to provide corresponding non-inhibitory concentrations of test substances for biodegradation tests.