The units were fed approximately
twice a week and the waste was weighed before adding.
The OHWwas supplied by volunteers from the Department of Environmental
Engineering, Technical University of Denmark, and it was
assumed that the feedstock for each of the composting units represented
food waste from a Danish single-family household. Each of
the composting units was fed with waste from two volunteers,
which means that the input material was different in all composting
units. A typical Danish household engaged in home composting on
average process 45–55 kg OHW year1 (0.9–1.1 kg week1) according
to Petersen and Kielland (2003). The amounts of food waste
added to the composting units in this study were larger (2.6–
3.5 kg week1 on average during the composting phase) than the
average suggested by Petersen and Kielland (2003). This was considered
to represent ‘‘good home composting practice”, meaning that it