[Effect of temperature control on vegetable waste and flower straw co-composting]

The effect of temperature control on vegetable waste and flower straw co-composting was investigated in pilot scale. The mixture of shredded vegetable waste and flower straw was composting in 2 m3 static aerobic bed on the controls of three different temperature level (55 degrees C, 60 degrees C, 65 degrees C). Of these trials, temperature, organic matter, moisture content were measured in order to research effect of temperature control on wastes reduction, biodegradation and moisture removal. As the control levels of temperature was 55 degrees C, 60 degrees C, 65 degrees C during composting, the ratios of wastes reduction were 45.8%, 63% and 58.1%, respectively. And the ratiosof wastes biodegradation were 23.4%, 41.4% and 23.8%, respectively. And the ratios of water removal were 59.9%, 79.1% and 78%, respectively. It was the most effective to control temperature of composting on about 60 degrees C among the three control levels of temperature trials, either base of biodegradation or moisture removal. The control temperature of 65 degrees C also have a powerful ability of moisture removal, but its biodegradation is not so efficient as that of 60 degrees C. The control temperature of 55 degrees C have the worst ability to reducing wastes, degrading organic matter and removing water during the co-composting of vegetable and flower wastes.