biogas (version 1.8.0)

mass: Mass Change of Batch Reactors

Description

Mass measurements for 9 batch anaerobic reactors.

Usage

data("mass")

Format

A data frame with 18 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_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.

mass

total reactor mass in g, a numeric vector.

when

when was measurement taken? A character vector with two values.

Details

These data are meant to be example data for mass2vol, for gravimetric determination of biogas production. Reactors were 500 mL glass serum bottles with butyl rubber septa and screw caps. Masses were measured with an electronic balance to 100 mg. Data in vol, mass, massw, comp, and setup are from the same reactors.

Examples

# NOT RUN {
data(mass)
# }