strawPressure: Headspace Pressure in Batch Reactors
In biogas: Process Biogas Data and Predict Biogas Production

Description Usage Format Details Source Examples

Interval-based measurements of headspace pressure in 12 anaerobic batch reactors with straw as the substrate.

1	data("strawPressure")

A data frame with 72 observations on the following 5 variables:

bottle: identification code, a unique value for each reactor in the dataset. Integer with all values from 1 to 12.
date.time: date and time of mass measurement, a POSIXct object.
time: elapsed time of mass measurements (from reactor setup) in days, a numeric vector.
pres: absolute bottle headspace pressure at the stated time, in kPa. Biogas accumulated in bottles from the previous time.
pres.resid: absolute bottle headspace pressure after venting, in kPa.

These data are meant to be example data for cumBg. Reactors were ca. 600 mL glass serum bottles with butyl rubber septa and screw caps. Pressure was measured using an electronic manometer. Data in strawMass, strawSetup, and strawComp are from the same reactors.

Measurements by Charlotte Rennuit.