ASTM D5511 PDF

Nir Link to Active This link will always route to the current Active version of the standard. Note 1—This test method is equivalent to ISO Reports shall clearly state the percentage of net c carbon generation for both the test and reference samples at the completion of the test. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The molar weight of the total gas produced by the test samples is calculated and compared to the carbon weight of the original samples and the percent biodegradation of the samples can then be determined. This test method also resembles other anaerobic conditions where the gas generated is recovered and biogas production is actively promoted by inoculation for example, codeposition of anaerobic sewage sludge, anaerobic leachate recirculationmoisture control for example, leachate recirculationand temperature control for example, short-term injection of oxygen, heating of recirculated leachate 5, 6, 7.

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Nir Link to Active This link will always route to the current Active version of the standard. Note 1—This test method is equivalent to ISO Reports shall clearly state the percentage of net c carbon generation for both the test and reference samples at the completion of the test. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The molar weight of the total gas produced by the test samples is calculated and compared to the carbon weight of the original samples and the percent biodegradation of the samples can then be determined. This test method also resembles other anaerobic conditions where the gas generated is recovered and biogas production is actively promoted by inoculation for example, codeposition of anaerobic sewage sludge, anaerobic leachate recirculationmoisture control for example, leachate recirculationand temperature control for example, short-term injection of oxygen, heating of recirculated leachate 5, 6, 7.

It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Three vessels are used for each sample, and one negative control and one positive control are prepared as well. Biodegradation of a plastic within a high-solids anaerobic digestion unit is an important phenomenon because it will affect the decomposition of other waste materials enclosed by the plastic and the resulting quality and appearance of the digestate after an anaerobic digestion process.

If the positive control which contains cellulose continues to exhibit biodegradation then the test is considered valid and the inoculum considered alive. The test materials are exposed to a methanogenic inoculum derived from anaerobic digesters operating only on pretreated household waste. This procedure has been developed to permit the determination of the rate and degree of anaerobic biodegradability of plastic products when placed in a high-solids anaerobic digester for the production of digestate from municipal solid waste.

Work Item s — d revisions of this standard. Reports shall clearly state the percentage of net gaseous carbon generation for both the d and reference samples at the completion of the test. Biodegradation of plastics could allow for the safe disposal of these plastics through aerobic and anaerobic solid-waste-treatment plants.

Placing asstm sample materials in an inoculum derived from anaerobic digesters operating on household waste. Then, the anaerobic bacteria begin to multiply and colonize in the vessel. Specific hazards are given in Section 8. The procedure is intended to create a standard laboratory environment that will s a rapid and reproducible determination of the anaerobic biodegradability under high-solids digestion conditions. Furthermore, results shall not be extrapolated past the actual duration of the test.

These gasses are measured daily and the results are carefully recorded. Link to Active This link will always route to the current Active version of the standard. R inoculum contains methanogenic bacteria that are also found in landfills.

Historical Version s — view previous versions of standard. This test method determines the degree and rate of biodegradation of plastic materials in an oxygen-free anaerobic environment. Work Item s — proposed revisions of this standard. When the test is run to satisfaction, final carbon and methane gas readings are recorded and qstm incubation vessels are emptied and the samples are cleaned and weighed. Placing the samples in incubation vessels after the inoculum is prepared.

Active view current version of standard. ASTM D — Anaerobic Biodegradation This test method is designed to be applicable to all plastic materials that are not inhibitory to the microorganisms present in anaerobic digesters operating on household waste. The test is allowed to run for as long as desired. The vessels are airtight and are not exposed to UV radiation. However, it is expected to resemble the environment of a ast, anaerobic-digestion process operated under optimum conditions.

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ASTM D5511 – Anaerobic Biodegradation

More D Biodegradation of plastics could allow for the safe disposal of these plastics through aerobic and anaerobic solid-waste-treatment plants. This procedure has been developed to permit the determination of the rate and degree of anaerobic biodegradability of plastic products when placed in a high-solids anaerobic digester for the production of digestate from municipal solid waste. However, it is expected to resemble the environment of a high-solids anaerobic-digestion process operated under optimum conditions. More specifically, the procedure is intended to create a standard laboratory environment that will permit a rapid and reproducible determination of the anaerobic biodegradability under high-solids digestion conditions. Scope 1. The test materials are exposed to a methanogenic inoculum derived from anaerobic digesters operating only on pretreated household waste.

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ASTM D5511

More D Scope 1. The test materials are exposed to a methanogenic inoculum derived from anaerobic digesters operating only on pretreated household waste. This test method may also resemble some conditions in biologically active landfills where the gas generated is recovered and biogas production is actively promoted by inoculation for example, codeposition of anaerobic sewage sludge, anaerobic leachate recirculation , moisture control for example, leachate recirculation , and temperature control for example, short-term injection of oxygen, heating of recirculated leachate 5, 6, 7. Reports shall clearly state the percentage of net gaseous carbon generation for both the test and reference samples at the completion of the test. Furthermore, results shall not be extrapolated past the actual duration of the test.

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ASTM D5511 PDF

Biodegradation of plastics could allow for the safe disposal of these plastics through aerobic and anaerobic solid-waste-treatment plants. This procedure has been developed to permit the determination of the rate and degree of anaerobic biodegradability of plastic products when placed in a high-solids anaerobic digester for the production of digestate from municipal solid waste. This test method may also resemble some conditions in biologically active landfills where the gas generated is recovered and biogas production is actively promoted by inoculation for example, codeposition of anaerobic sewage sludge, anaerobic leachate recirculation , moisture control for example, leachate recirculation , and temperature control for example, short-term injection of oxygen, heating of recirculated leachate Limitations Because there is a wide variation in the construction and operation of anaerobic-digestion systems and because regulatory requirements for composting systems vary, this procedure is not intended to simulate the environment of any particular high-solids anaerobic-digestion system. However, it is expected to resemble the environment of a high-solids anaerobic-digestion process operated under optimum conditions. More specifically, the procedure is intended to create a standard laboratory environment that will permit a rapid and reproducible determination of the anaerobic biodegradability under high-solids digestion conditions. Reports shall clearly state the percentage of net gaseous carbon generation for both the test and reference samples at the completion of the test. Furthermore, results shall not be extrapolated past the actual duration of the test.

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