strawPressure {biogas}

Headspace Pressure in Batch Reactors

Description

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

Usage

data("strawPressure")

Format

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.

Details

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.

Source

Measurements by Charlotte Rennuit.

Examples

data(vol)