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Plastics and packaging materials can be more fantastic
if it´s biodegradable

Instrument for biodegradability and compostability analysis

The degradation of biodegradable polymers and biodegradable plastics crucially depends on the environments they may end up in, such as soil, fresh or marine water, landfill or composting site. Owing to the great variations in natural conditions, several tests are needed to determine the fate of a polymer material in real life and to study its biodegradability in different environments. In aerobic environments, the biodegradability is usually determined by measuring oxygen demand in a closed respirometer or the amount of carbon dioxide evolved over time. When oxygen is not available under the anaerobic conditions, the measurement of released biogas (a mixer of methane and carbon dioxide) is the method for evaluating anaerobic biodegradability. Biodegradability test can be performed under “certification” or “screening” conditions. Certification conditions are required in cases where the results are intended to be used for certification and/or making public claims on biodegradability, whereas screening conditions are suggested for internal research purposes.

The Gas Endeavour® is a novel respirometer for both anaerobic and aerobic biodegradation analyses. For anaerobic biodegradability test, the Gas Endeavour® provides efficient and accurate data analyses on biogas release in any aqueous medium, controlled slurry digestion system and high-solids anaerobic digestion condition. In case of aerobic biodegradability test, the Gas Endeavour® is intended be used together with our patented in-situ carbon dioxide absorption kit to function as a closed respirometer system for measuring oxygen demand. Alternatively, the Gas Endeavour® can also be used together with our ex-situ carbon dioxide absorption kit. This would enable to follow the carbon dioxide evolution by measuring the volume and flow rate difference between carbon dioxide-free air steam to the test vessel and the exhaust air after evolved carbon dioxide being removed. With help of in-situ and ex-situ carbon dioxide absorption kits, the Gas Endeavour® becomes a powerful tool and analysis platform for both anaerobic and aerobic biodegradability / compostability analyses and support the most of important ISO, European and American standards for biodegradability evaluation.

Analyse more and more professionally to make the most out of nature

Areas of application

related to anaerobic and aerobic biodegradability analysis

Gas Endeavour® allows for continuous and on-line monitoring of released biogas in any aqueous medium, controlled slurry digestion systems and high-solids anaerobic digestion conditions. The instrument can be used to perform anaerobic biodegradability analyses according to following norms:

  • ISO 14853 – ultimate anaerobic biodegradation of plastic materials in an aqueous system
  • ISO 13975 – ultimate anaerobic biodegradation of plastic materials in controlled slurry digestion systems
  • ISO 15985 – ultimate anaerobic biodegradation and disintegration under high-solids anaerobic digestion conditions
  • ISO 11734 – ultimate anaerobic biodegradability of organic compounds in digested sludge
  • ASTM D5511 – anaerobic biodegradation of plastic materials under high-solids anaerobic digestion
  • ASTM D5210 – anaerobic biodegradation of plastic materials in the presence of municipal sewage sludge
  • ASTM D5526 – anaerobic biodegradation of plastic materials under accelerated landfill conditions
  • OECD 311 – anaerobic biodegradability of organic compounds in digested sludge

Together with the in-situ carbon dioxide absorption kit,  Gas Endeavour® works as a volumetric respirometer and allows for continuous and on-line measurement of oxygen consumption or depletion caused by aerobic respiration of microorganisms. The instrument can be used to perform aerobic biodegradability analysis according to following norms:

  • ISO 14851 – ultimate aerobic biodegradation of plastic materials in an aqueous system
  • ISO 17556 – ultimate aerobic biodegradation of plastic materials in soil
  • ISO 18830 – aerobic biodegradation of non-floating plastic materials in a seawater/sandy sediment interface
  • ISO 22404 – aerobic biodegradation of non-floating materials exposed to marine sediment
  • ISO 19679 – aerobic biodegradation of non-floating plastic materials in a seawater/sediment interface
  • ISO 14852 – ultimate aerobic biodegradability of plastic materials in an aqueous medium

Gas Endeavour® can also be used to set up tests for measuring the evolved carbon dioxide directly with help of ex-situ carbon dioxide absorption kit. Such an arrangement could be suitable for compostability analysis and as an alternative method for oxygen demand measurement for several aerobic biodegradability protocols based on analysis of evolved carbon dioxide.

  • ISO 14855 -1 – ultimate aerobic biodegradation of plastic materials under controlled composting conditions
  • AS 5810 – biodegradable plastics suitable for home composting

benefits & advantages

Highly precise and accurate data

The Gas Endeavour® gives you a better understanding of the degradation kinetics of biodegradable polymers. The precision of measurements and data calculations have been validated with the highest quality and standards.

Significant reduction in time consumption and labour requirements

Fully automated analytical procedures, extendable testing capacity and full control of experiments with remote access. The Gas Endeavour® reduces the time consumption and labour requirement for performing both anaerobic and aerobic biodegradability analyses and make the test being less skill dependent for precise and accurate data.

Standardised measurement procedures, data interpretations and reports

Real-time temperature and pressure compensations minimise the impact of possible variations in measurement conditions in analysis and standardise data presentation, satisfying the highest demands for data accuracy and precision. An adaptive nonlinear mathematical model is also implemented in the latest released Gas Endeavour® to achieve an outstanding high linearity for oxygen demand and carbon dioxide evolution measurement in all measurement ranges.

Compact and modular design

The modular approach enables flexible system set-up, easy upgrading options and simple maintenance. The Gas Endeavour® can easily be further expanded by connecting multiple instruments with a network switch in order to satisfy demands and shorten development times.

User-friendly operations with remote access

Simple to use and easy to learn. The web-based software application makes setting up and monitoring experiments very easy. The Gas Endeavour® allows easy access from a remote location using any computer, smartphone or tablet.

– a novel tool for anaerobic and aerobic biodegradability assays

The Gas Endeavour® is a novel platform for analysing low gas volume and flow whenever there is a demand for high accuracy and precise measurements. The instrument can be used for research and industrial applications relating to: compostability, other aerobic biodegradability analyses  with significant improvement of efficiency and data quality while reducing operational time, analyses cost, labour and being less dependent on individual laboratory skill.

Reference

Scientific reference for anaerobic biodegradability assay

Article title: “Assessment of models for anaerobic biodegradation of a model bioplastic: Poly(hydroxybutyrate-co-hydroxyvalerate)”

Authors: Cecily A. Ryan, Sarah L. Billington, Craig S. Criddle
Bioresource Technology (2018), 227, 205-213

Dept of Civil and Environmental Engineering, Stanford University (United States)

Five kinetic models of anaerobic digestion are evaluated to determine their suitability for modelling of anaerobic biodegradation of the bioplastic poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV). AMPTS® II was used to perform the actual anaerobic biodegradability analysis in order to produce kinetic degradation data for evaluating the model simulation.

Reference

Scientific reference for anaerobic biodegradation assay

Article: “Mechanical, rheological and anaerobic biodegradation behavior of a Poly(lactic acid) blend containing a Poly(lactic acid)-co-poly(glycolic acid) copolymer”

Authors: Kosar Samadi, Michelle Francisco, Swati Hegde, Carlos A. Diaz, Thomas A. Trabold, Elizabeth M. Dell, Christopher L. Lewis
Polymer Degradation and Stability (2019) 170, 109018

Rochester Institute of Technology (United States)

AMPTS® II was used to examine the thermophilic anaerobic biodegradation performance of PLA blends containing a highly degradable polymer.

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