Compost volume variations were determined by measuring the height reached by the compost inside the bin. Volume losses were calculated as percentage in ratio between the final compost volume and the sum of volume gain following each waste addition (Breintenbeck and Schellinger, 2004). Weight loss ratio was calculated in the same way. Losses were calculated using the following equations:
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Weight loss ratio = 100 [1 − final weight/(previous phase weight intake + sum of weight intakes)];
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Volume loss ratio = 100 [1 − final volume/(initial volume + increments of volume by intake)].