The WooWoo GT and GT LUX are batch composting toilets. This means that composting takes place within the container. To make great compost in the most efficient way, you need a source of carbon to work with the nitrogen that’s in the faeces and urine. Wood shavings or sawdust are an ideal, readily available and inexpensive carbon-based material for this job.
As well as acting as a carbon source to make the perfect compost blend, shavings or sawdust will also help suppress odours (although the ventilation system will be doing most of the work for that aspect) and act as a visual cover.