Proper Insulated Materials for Temperature Accumulation in Box Technology to Catalyze the Organic Digestion Processing on Community Garbage Disposal

The research is aimed to determine the appropriate insulated materials and the thickness of insulated boxes for keeping in-box temperature around 70 oC. The experiments were conducted by taking amount of 500 g river gravels (number 3) to heat in Hot air oven at 100 oC for 24 hours before putting in the 0.027 m3 (30x30x30 cm) insulated boxes. The in-box (T1) and out-box (T2) ambient air temperature were recorded by automatic data locker from beginning to the end of experiments. The relationship between time (t) and in-box temperature by graphical techniques in order to select the appropriate insulated material under the criterions of The King's Royally initiative nature-by-nature process, simplicity technology, and low expense (or local materials using for constructing technology), Also, the relations between Q (heat conduction) of temperature differences (in-box and outside box) in varying time (t) as same as the insulated material thickness was evaluated from graphical products of fixing T1 (equivalent to 70 oC) and Q of varying ambient air temperature. The results found that rice straw as the appropriate insulated material tether with the minimum rice-straw insulated thickness of 6 cm in which the in-box temperature could be kept long enough for psychrophiles, mesophiles, thermophiles, and hyper-thermopile to complete the digestion of carbohydrates, proteins, celluloses, hemicelluloses, and fibers. Moreover, the research result was also pointed out the values of ambient air temperature (from -10 oC to 70 oC) is inversely related to thickness of the rice-straw insulated boxes, by taking the minimum thickness of 6 cm for T2 equivalent to 30 oC.