comp: Methane Content of Biogas
In biogas: Process Biogas Data and Predict Biogas Production

Description Usage Format Details Source Examples

Methane content (biogas composition) measurements from nine batch reactors.

1	data("comp")

A data frame with 132 observations on the following 4 variables.

id: identification code, a unique value for each reactor in the dataset. A factor with levels 2_1, 2_2, 2_3, 2_4, 2_5, 2_6, 2_7, 2_8, 2_9, 2_10, 2_11, and 2_12
date.time: date and time of mass measurement, a POSIXct object.
days: elapsed time of mass measurements (from reactor setup) in days, a numeric vector.
xCH4: biogas methane content as a mole fraction, excluding water and all other gases other than carbon dioxide, a numeric vector

These data are meant to be example data for multiple functions, e.g., interp, cumBg, or summBg. Reactors were 500 mL glass serum bottles with butyl rubber septa and screw caps. Methane and carbon dioxide contents were determined by gas chromatography using a thermal conductivity detector and normalised so methane and carbon dioxide sum to 1.0. Data in vol, mass, comp, and setup are from the same reactors.

Measurements by Charlotte Rennuit and Ali Heidarzadeh Vazifehkhoran.