The worms are not our garden worms. The types used are African Night Crawler, Red and Tiger. They require specialised care and a carefully managed environment to transpose of the waste quickly and correctly. The whole area is covered by shade cloth to reduce wind, protect against seed and the dreaded Ibis and of course, the sun. The beds are protected from rain by plastic sheeting.
Worms retreat from light.
Before the sludge is given to the worms it is mixed with zealite. Zealite is an amazing odour absorbing material. Each molecule has a huge surface area and 'grabs' gases from the material. Material with odour present is detrimental to the worms. Other additives, including green waste, are mixed with the sludge.