Products that are used for the production of bio-energy need to be of a certain quality and need to meet specific criteria. That is why AgriBioSource was the first company in the biogas industry to obtain RBC B2 certification.
Download the Schouten certificate that pertains to the trade in co-substrates here.
Procedure to determine dry matter content
Organic acids in co-products
Fermentation occurs naturally during the storage of co-products. Starch and sugars are converted into organic acids. These acids contribute to the nutritional value of the co-product. These organic acids evaporate to some extent during the process of determining the dry matter. This evaporation only occurs during the drying process, so not during the storage. As a result, a re-analysis of the dry matter can return lower values than originally reported by AgriBioSource, while the nutritional value is fully preserved. AgriBioSource uses the officially recognised method of Productschap Diervoeder (NEN ISO 6469) to determine the dry matter content. AgriBioSource’s laboratory is moreover GMP+B10 certified.
Dry matter determination
AgriBioSource distinguishes between the dry matter determination of products with more than 4% sugar and products with less than 4% sugar. For products with less than 4% sugar, a sample is placed in a drier for four hours, at a temperature of 103°C. The sample is subsequently reweighed and the dry matter content is calculated.
For products with more than 4% sugar, a sample is placed in a vacuum drier for four hours at a temperature of 80°C. The sample is subsequently reweighed and the dry matter content is calculated. If products with more than 4% sugar are dried in a normal drier for 16 hours at 103°C, the sugar content may burn up, resulting in a lower dry matter content.
If any dispute arises regarding the delivered dry matter content, a re-analysis will be performed using the sample provided to the customer upon delivery. As there is some variation in the amount of organic acids and ethanol in the co-products and as additional organic acids may have formed during storage at the customer, in the event of a deviation of >5.0% the original supply sample will be retrieved, and a re-analysis will be performed at our laboratory.
The re-analysis can only be performed using the original supply sample and must be performed within five office days after the dry matter content is reported to the customer.