Green Johanna Hot Composter

Product Information

Two secure sliding hatches mean finished compost is easy to access but won’t leak out before you need it. The Johanna’s patented airflow and ventilation systems create optimum conditions for a busy ecosystem of composting micro-organisms to digest waste, releasing energy as they do – hence the term hot composter. Food waste should be dropped into the Cone directly, not in bags of any kind, even compostable ones. Waste lands in the underground basket, where micro-organisms and worms enter and begin to break it down. The upper part of the Cone above ground remains empty: the inner and outer cones create a heat trap of circulating air that facilitates the growth of beneficial micro-organisms and promotes the aerobic digestion process.

Falkirk, Aberdeen Perth Kirkwall Paisley and Inverness Areas (not islands), Isle of Man and Isle of Wight Hot compost bins: Insulated with a close-fitting lid, these are designed to allow decomposition at a much higher temperature and therefore higher speed than other composters (30-90 days, compared to around six months). They also result in a finer compost. Roughly the size of a wheelie bin, they need to stand on a hard surface. Postcodes: AB37-38 AB41-56 FK 17-21 IV1- 40 IV52-54 IV63 KW1-14 PA21-40 PA80 PH15-50 IM1-9 IM86-87 IM99 PO30-41) The Green Johanna comes with a handy compost aerator to stir compost every few weeks. This is really good to keep the contents aerated and to speed up the composting process.Throughout her time at the University of Glasgow, Johanna demonstrated an unwavering commitment to her students' education and personal growth. She was a model of research-led teaching, skilfully utilising the vast collections within the University's Library Archives & Special Collections to inspire and engage her students.

Recommended as a Best Buy in Gardeners’ World magazine and in Which? magazine, the Green Johanna is a top-performing hot composter that turns food waste - including cooked food, meat, fish and dairy - and garden waste into quality compost within months.In the process heat is produced. Some very valuable micro-organisms work at temperatures as high as 65C (150F). This is hot composting, oxygen in the air is critical to the process. The mesophilic phase occurs at the start when decomposition is carried out under moderate temperatures by mesophilic organisms. The thermophilic phase occurs as the temperature rises and various thermophilic (heat-creating) bacteria carry out decomposition at temperatures of 50-60 degrees Celsius. The maturation phase occurs when the temperature starts to decrease as the supply of high-energy compounds dwindles and mesophilic bacteria once again predominate.