🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
ASTM-E1625:2008 Edition

ASTM-E1625:2008 Edition

$40.63

E1625-94(2008) Standard Test Method for Determining Biodegradability of Organic Chemicals in Semi-Continuous Activated Sludge (SCAS)

Published By Publication Date Number of Pages
ASTM 2008 7
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

ASTM E1625-94-Reapproved2008

Withdrawn Standard: Standard Test Method for Determining Biodegradability of Organic Chemicals in Semi-Continuous Activated Sludge (SCAS) (Withdrawn 2013)

ASTM E1625

Scope

1.1 This test method covers procedures for the determination of the biodegradability or removability, or both, of nonvolatile organic chemicals (Henry’s Constant <10−3 atm/m3/day) using a laboratory bench scale test and activated sludge from a domestic wastewater treatment plant.

1.2 This test method is derived from a procedure developed for surfactants by the Soap and Detergent Association (1, 2), one developed for alkylbenzene sulfonates by ASTM (see Test Method D 2667) and one developed by the Organization for Economic Cooperation and Development (OECD) for assessing inherent biodegradation (3) and also codified in the Toxic Substances Control Act Test Guidelines (4). For assessment of variability, replicate test systems (three or more) should be employed. It is recommended that the tests be used for chemical compounds that can be well characterized with respect to chemical and physical properties. Testing of mixtures or fully formulated products can lead to serious problems in data interpretations.

1.3 The procedures involve the exposure of the test chemical(s) to activated sludge mixed liquor microorganisms over a finite time cycle in specially designed aeration chambers. Biodegradability is determined from dissolved organic carbon (DOC) measurements, from radiochemical analyses, or from measurements of test chemical concentration using a specific analytical method. Based on DOC analyses alone, biodegradation can only be claimed if other removal mechanisms (for example, adsorption, volatility, or chemical transformation) are discounted by means of specific testing or knowledge of physical chemical properties of the test chemical. Modifications of this test method for water insoluble and moderately volatile chemicals are presented in this test method and principles are described in somewhat more detail elsewhere (see 5, 6).

1.4 These procedures may also be used as a means of acclimating microorganisms to an organic chemical over an extended period. The acclimated microorganisms may be used as an inoculum source for other biodegradation tests.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements see Section 7 and in Note 1.

Keywords

Dissolved organic chemicals; Henry’s Constant; Hydrolysis; Microorganisms; Organic chemicals; Oxidation testing; Sludge; Volatility; Wastewater testing/treatment; Adsorption; Biodegradation; Chemicals (environmental analysis

ICS Code

ICS Number Code 13.060.70 (Examination of water for biological properties)

DOI: 10.1520/E1625-94R08

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Summary of Test Method
2 Significance and Use
Apparatus
Reagents and Materials
Safety Precautions
FIG. 1
3 Sampling and Analytical Procedure
FIG. 2
FIG. 3
4 Procedure
5 Calculation
Interpretation
6 Quality Assurance
Report
TABLE 1
7 REFERENCES

Related products

ASTM-E1625
$40.63