What is BS EN 14735 about?
BS EN 14735 describes the steps to be performed before carrying out ecotoxicity tests on wastes. BS EN 14735 applies to solid and liquid wastes.
BS EN 14735 provides guidance on the taking of the sample, transport, storage of wastes and to define preparation, for the determination of ecotoxicological properties of wastes under the conditions specified in BS EN 14735 by biological testing either as raw wastes or water extracts from wastes.
Note 1: Sample preparation for other applications (e.g., assessment of waste effects on aquatic and terrestrial organisms in a disposal scenario) is not considered.
Note 2: Sample preparation for other applications (e.g., assessment of waste effects on aquatic and terrestrial organisms in a disposal scenario) is not considered.
Who is BS EN 14735 for?
BS EN 14735 on the characterization of waste is useful for:
- Waste management authorities
- Waste treatment plants
- Research laboratories
- Ecotoxicologists
Why should you use BS EN 14735?
Ecotoxicity tests apply to wastes to identify their potential hazardous properties concerning the environment for classification purposes, or to assess the risk related to a site-specific exposure scenario.
The ecotoxicity tests listed in BS EN 14735 are commonly used for hazard assessment of chemicals, water, or soil quality. All the test methods, listed in the BS EN 14735, are standardized, at least at a national level; or more often, these test methods are internationally harmonized by CEN, ISO, or OECD. As such, these ecotoxicity tests have gained scientific credibility. The steps described in BS EN 14735 are to be performed before carrying out ecotoxicity tests on wastes within the context of the assessment of ecotoxic properties for classification purposes. These tests will help you identify specific causes for polluting a site or region and assist in framing remedies to counter them.
A classification system in BS EN 14735 is based on the assessment of intrinsic properties, should be independent of an exposure scenario. The main requirement is to establish a relevant system for classifying wastes and for the assessment of hazard properties. The objective is to obtain comparable test results. This can only be obtained if the ecotoxicity tests on wastes are carried out according to a unique procedure describing more or less conventional test conditions.
What’s changed since the last update?
BS EN 14735:2021 supersedes EN 14735:2005.
The main editorial changes compared to EN 14735:2005 are as follows:
- The modification of Clause 12 “Test report” to specify whether ecotoxicity tests have been repeated with pH adjustment of the test portion, allowing to clearly distinguish these results from those obtained without pH adjustment
- The clarification of the notes of 10.5 and 11.2.3 and associated notes regarding the repetition of the tests with pH adjustment
- The update of Annex B, describing the ecotoxicity tests considered to establish BS EN 14735:2021
