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Miscanthus Databases

 

 

 

 

 

 

 

 

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For more information about this topic contact Daniel Hayes

 

There are two Databases regarding the Miscanthus samples that have been analysed at Carbolea. These can be installed on your computer by downloading the installer package from the Carbolea website.

When the program is loaded the initial screen offers the option of which Database to load, the "Plant Section Database" or the "Whole Plant Database"

database_select

Plant Section Database

This Database presents a list of all of the plant fractions that constitute the 71 plants presented in the "Whole Plant Database" (a total of 479 samples) as well as additional samples that were collected between 2008 and 2010. In total there are 694 samples in this Database.

sample_list

While the plants sampled in the "Whole Plant Database" are all of the Miscanthus x giganteus variety, some of the samples present in the "Plant Section Database" come from other varieties. The variety class can be filtered according to "Giganteus", "Sinensis", or "Other" (neither giganteus nor sinensis).

The list of Miscanthus samples can be filtered according to the month and location of sample collection, according to the height class of the plant from which the sample was taken, and according to the plant fraction.

The samples in the list can be sorted in descending order according to each column by clicking the column header.

If a sample is double-clicked a separate page, entitled "Plant Fraction Data and Predicted Biorefining Yields", will be launched. This contains more detailed compositional data for the plant fraction as well as predictions for the yields that could be obtained when that sample is processed in a range of different representative biorefining technologies.

sample_detail_lignocellulosic

The "Analytical" compositional values in this sample detail page are those those that were obtained via conventional wet-chemical analysis.

The "NIR" compositional values are those that have been predicted by the near infrared spectroscopy models developed.

The "Chosen" compositional values reflect those that are presented in the "Miscanthus Sample List" page of the "Plant Section Database" and also the values that are used to calculate the weighted average composition of the whole Miscanthus plant in the "Whole Plant Database". If analytical data exist for any given compositional parameter for that sample then that value is also listed in the "Chosen" category. Alternatively, if NIR-predicted values exist these are used for the Chosen data.

The "Lignocellulosic Data" tab of the detail page presents two pie-charts. The "Whole Mass Balance" chart shows the relative proportions of the mass consitutents of the plant sample whilst the "Sugars as a Percentage of Sugars Total" chart shows the relative proportions that the different lignocellulosic sugars contribute to the total sugars content of the sample.

The "Elemental and Moisture Data" tab presents data for the moistute, elemental (carbon, hydrogen, nitrogen, sulphur) and ash contents of the sample. NIR models were only developed for the nitrogen, ash, and moisture contents.

sample_detail_elemental

The "Projected Yields from Biorefining Technolgies" subsheet in the Compositional Data page uses the "Chosen" data to determine what biofuel yields may be expected from processing the sample in a range of representative process technologies.

sample_yields

 

Whole Plant Database

A total of 71 plants were collected according to the sampling methodology outlined. All of these plants are listed when the Plant List initially loads.

plant_list

Each fraction of the plant (e.g. internodes, live leaf blades etc.) that was sampled was weighed and analysed by either wet-chemical or spectroscopic means. This allowed for a weighted-average composition to be determined for the plant as a whole. This composition is displayed on the list page as well as information regading the date and location of sample collection and the height class of the plant. Data is also provided for the proportions for the total percent mass of the plant that was stems and leaves. The yield forecast was determined by assuming that the yield at the end of the harvest window was 12 dry tonnes per hectare and that the mass of stems was constant over the harvest window. The increase in mass seen in an early harvest is therefore associated with the proportionate increase seen in the relative amount of leaf to stem mass in the plant sampled.

The other tabs in the Plant List Page illustrate the trends seen for the plants in the list. No clear trends will be apparent if the list contains all the plants collected, however the list can be filtered according to a number of categories including the month and location of plant collection and the modal height class of the plant. If the plants for only one month (e.g. January) are selected then the first chart on the "Mass Trends" tab shows that there is an inverse relationship between total plant mass and the proportion that leaves contribute to this mass. Total plant mass can be considered to be equivalent to plant height. Hence, in order to compare chemical and leaf/stem mass changes in a particular site over time it is appropriate to only select one height class. This should be the modal height class for the site, which is >2m for all sites except Clonmel and Kilkenny.

plant_trends

The plants listed can be sorted according to the column headings in the list and more detailed compositional information about them can be obtained by double-clicking the plant. This launches the "Detailed Plant Data and Predicted Biorefining Yields" page.

plant_detail_lignocellulosic

The "Lignocellulosic Data" tab of this page presents more detailed information regarding the composition of the plant and includes the amounts of each of the different polysaccharide sugars. Pie charts are also used to illustrate the relative proportions of the different mass components for the whole plant as well as for the stem and leaf fractions of the plant.

The "Plant Fractions" tab describes the relative mass proprotions seen for the various fractions of the plant. Data are provided for the relative proportions of stems and leaves as well as for how each fraction contributes to the total plant mass and either the total leaves or total stem mass.

plant_frations_detail

For each plant fraction there is a button that can be clicked to provide detailed compositional information for that fraction. This is launched in the separate "Plant Fraction Data and Predicted Biorefining Yields" page.

The "Predicted Yields from Biorefining Technologies" tab presents the yields that could be expected from processing the selected plant in a range of different representative biorefining hydrolysis technologies.

Download

These Databases were written in Microsoft Access 2010. If you have this program on your computer you only need to download and run the Miscanthus Database Installer Package. The installer is packaged in a zip file that needs to be extracted. Once this has been done double-click on the "Setup" icon to install the program.

If you do not have Microsoft Access 2010 or Microsoft Access Runtime 2010 you will need to download the Miscanthus Database Installer Package that includes the Runtime 2010 installer. There are two installer options, one for 32 bit Windows and the other for 64 bit Windows. Once the required file has been downloaded and extracted, run the "Setup" file and Microsoft Access Runtime 2010 and the Carbolea Miscanthus Database will both be installed in sequence.

Once the Database program has been installed it can be loaded by double-clicking the program launcher icon on the Desktop. The sofware is installed in the "My Documents" folder of the user that was logged-in when the Database was installed.

Files

Miscanthus Database v1.0 Installer Package (2.5 MB)

Miscanthus Database v1.0 Installer Package + Access Runtime 2010 (32 bit) (182 MB)

Miscanthus Database v1.0 Installer Package + Access Runtime 2010 (64 bit) (220 MB)

 

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For more information about this topic contact Daniel Hayes


 

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