strawComp

Methane content (biogas composition) measurements from 12 anaerobic batch reactors with straw for substrate.

datasets

High- and low-level functions for processing biogas data and predicting biogas production. Molar mass and calculated oxygen demand (COD') can be determined from a chemical formula. Measured gas volume can be corrected for water vapor and to (possibly user-defined) standard temperature and pressure. Gas quantity can be converted between volume, mass, and moles. Gas composition, cumulative production, or other variables can be interpolated to a specified time. Cumulative biogas and methane production (and rates) can be calculated from raw data obtained using volumetric, manometric, gravimetric, or gas density methods for any number of bottles. With cumulative methane production data and data on bottle contents, biochemical methane potential (BMP) or specific methane production (SMP) can be calculated and summarized, including subtraction of the inoculum contribution and normalization by substrate mass. Cumulative production and production rates can be summarized in several different ways (e.g., omitting normalization) using the same function. Biogas quantity and composition can be predicted from substrate composition and additional, optional data. Inoculum and substrate mass can be determined for planning BMP experiments. Finally, first-order models can be fit to measurements in order to extract estimates of ultimate yield and kinetic constants.

Sasha D. Hafner

biogas

Process Biogas Data and Predict Biogas Production

Charlotte Rennuit

Camilla Justesen

Nanna Lojborg

Jacob Mortensen

Jonas Ohlsson

Sergi Astals

Konrad Koch

Soeren Weinrich

Jin Mi Triolo

Ali Heidarzadeh Vazifehkhoran

strawComp function

A data frame with 63 observations on the following 4 variables.<dl>
 <dt><code>bottle</code></dt>
<dd>identification code, a unique value for each reactor in the dataset. Integer with all values from 1 to 12.</dd> <dt><code>date.time</code></dt>
<dd>date and time of mass measurement, a POSIXct object.</dd> <dt><code>time</code></dt>
<dd>elapsed time of mass measurements (from reactor setup) in days, a numeric vector.</dd> <dt><code>xCH4</code></dt>
<dd>biogas methane content as a mole fraction, excluding water and all other gases other than carbon dioxide, a numeric vector</dd> 
</dl>

Format

Methane Content of Biogas — strawComp

A data frame with 63 observations on the following 4 variables.<dl>
 <dt><code>bottle</code></dt>
<dd>identification code, a unique value for each reactor in the dataset. Integer with all values from 1 to 12.</dd>

 <dt><code>date.time</code></dt>
<dd>date and time of mass measurement, a POSIXct object.</dd>

 <dt><code>time</code></dt>
<dd>elapsed time of mass measurements (from reactor setup) in days, a numeric vector.</dd>

 <dt><code>xCH4</code></dt>
<dd>biogas methane content as a mole fraction, excluding water and all other gases other than carbon dioxide, a numeric vector</dd>

 
</dl>

Methane Content of Biogas

strawComp: Methane Content of Biogas

Description

Usage

Arguments

Format

Details

Examples