초록 ▼

Method for determining in an accelerated manner the biodegradability of at least one product under anaerobic conditions which are similar to those in a dump, characterized in that a mixture with a dry substance content of between 25 and 50% is prepared with more than 80 weight-% of an active anaerob

Method for determining in an accelerated manner the biodegradability of at least one product under anaerobic conditions which are similar to those in a dump, characterized in that a mixture with a dry substance content of between 25 and 50% is prepared with more than 80 weight-% of an active anaerobic inoculum and less than 20 weight-% of the product, on the one hand, at least one quantity of this mixture and, on the other hand, at least one quantity of the inoculum is subjected in the same manner to a fermentation at a temperature of between 30 and 60 degrees Centigrade in anaerobic conditions, the amount of biogas that is released with both these fermentations is separately measured or calculated, starting with these amounts the amount of biogas produced by the product alone is deduced and starting with the latter amount the degradability of the product itself is determined, this is the amount of carbon which was degraded from the product and converted into CO2 and CH4.

대표청구항 ▼

An accelerated method for determining the biodegradability of at least one product under anaerobic conditions similar to the anaerobic conditions present in a landfill, comprising the steps of: (a) preparing a test aliquot of a test mixture with a final dry substance content of 25 to 50% which compr

An accelerated method for determining the biodegradability of at least one product under anaerobic conditions similar to the anaerobic conditions present in a landfill, comprising the steps of: (a) preparing a test aliquot of a test mixture with a final dry substance content of 25 to 50% which comprises at least 80% by weight of anaerobic inoculum comprising refuse and living microorganisms and less than 20% by weight of a product, the biodegradability of which under anaerobic conditions is to be determined; (b) preparing a control aliquot of said anaerobic inoculum alone; (c) separating subjecting said test aliquot and said control aliquot of said anaerobic inoculum to a fermentation at a temperature of between 30 and 60 degrees Centigrade under anaerobic conditions for a period of time ranging from 7 to 70 days; (d) measuring the amount of biogas produced by said test aliquot and measuring the amount of biogas produced by said control aliquot of said anaerobic inoculum during said period of time; and (e) determining the biodegradability of said product during said period of time by subtracting the amount of biogas produced by said inoculum alone from the amount of biogas produced by said test mixture.