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GB/T 21796-2022: Chemicals - Activated sludge respiration inhibition test
Status: Valid GB/T 21796: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21796-2022 | English | 349 |
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4 days [Need to translate]
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Chemicals - Activated sludge respiration inhibition test
| Valid |
GB/T 21796-2022
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| GB/T 21796-2008 | English | 274 |
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3 days [Need to translate]
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Testing of chemicals -- Activated sludge, respiration inhibition test
| Obsolete |
GB/T 21796-2008
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PDF similar to GB/T 21796-2022
Basic data | Standard ID | GB/T 21796-2022 (GB/T21796-2022) | | Description (Translated English) | Chemicals - Activated sludge respiration inhibition test | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A80 | | Word Count Estimation | 17,139 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 21796-2008: Testing of chemicals -- Activated sludge, respiration inhibition test---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.
Testing of chemicals. Activated sludge, respiration inhibition test
ICS 13.300; 13.020.40
A80
National Standards of People's Republic of China
Chemicals
Activated sludge respiration inhibition test
Posted 2008-05-12
2008-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is identical with the Organisation for Economic Co-operation and Development (OECD) guidelines for testing of chemicals No. 209 (1984), "activated sludge respiratory depression
System Test "(in English).
This standard made the following editorial changes.
--- The units of measurement to our legal units of measurement.
This standard is managed by the National Standardization Technical Committee chemicals dangerous (SAC/TC251) and focal points.
This standard is drafted by. Environmental Protection Department of Chemical Registration Center.
Participated in the drafting of this standard. Ministry of Environmental Protection, Nanjing Institute of Environmental Sciences, Chinese Academy of Inspection and Quarantine, Guangdong Province microbial
graduate School.
The main drafters of this standard. the new Liu Chun, Lu Ling, Shen Ying baby, Liu Jining, Zhou Junying, Falls Apart, Mei Chengfang.
Chemicals
Activated sludge respiration inhibition test
1 Scope
This standard specifies the chemical Activated Sludge Respiration Inhibition Test method overview, test preparation, test procedures, quality assurance and quality control
System, data and reporting.
This standard applies to most of the water-soluble, low volatility, easy to stay in the material body of water; do not apply to phosphoric acid may occur in the role of oxygen
The decomposition of the material. For a limited water-soluble test substance, may not be measured half-effect concentration.
This standard provides a rapid screening method to identify substances which may adversely affect aerobic microbial sewage treatment plant, and for the
Biodegradability tests provide no inhibition test concentration.
2 Terms and definitions
The following terms and definitions apply to this standard.
2.1
Oxygen sludge unit time or the amount of oxygen consumed by aerobic microorganisms in wastewater, usually consumed per liter per hour or sewage sludge cents
Expressed as grams [mg/(L · h)].
2.2
Compared with the control group, caused by microbial respiration rate decreased by 50% of the test concentration.
3 test substance information
a) structural formula;
b) purity;
c) solubility in water;
d) vapor pressure.
4 Summary of Method
4.1 Principle
Was added in an amount of activated sludge sewage synthesis, or touching 30min 3h, measuring aerobic microbial respiration rate. In the same article
Under parts, respiration rate was measured after the test system by adding various concentrations of the test substance the same activated sludge. Two control groups were accounted for using the Respiratory Rate
Percentage value indicates the inhibitory effect of a particular concentration of the test substance. Measurement results of different concentrations calculated from EC50 values.
4.2 reference material
The standard recommended 3,5-dichloro-phenol as a reference material.
4.3 Considerations
Activated sludge may contain potentially pathogenic organisms and should be handled with care.
5 Test preparation
5.1 instruments and equipment
a) measuring device, shown in Figure 1 (including magnetic stirrer, flat-bottomed flask);
b) aeration device;
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