Abstract
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.
Highlights
Thailand has been confronted on community and industrial solid waste disposal as well as infectious garbage in all parts of the country, especially populated cities, populated communities, and industrial estates due to the population growth and tourism promotion
This research is focused on determine the kind of insulated material and its composition to mold in sheet form in order to construct the squared-insulated box technology (INBOT) to keep the hot-temperature for thermophilic bacteria activities in digesting cellulose-fiber organic wastes
The insulated-sheet thickness is another purpose of this study on shortening the solid retention time (SRT) through the King's Royally initiative nature-by-nature process at the hand of bacterial organic digestion process
Summary
Thailand has been confronted on community and industrial solid waste disposal as well as infectious garbage in all parts of the country, especially populated cities, populated communities, and industrial estates due to the population growth and tourism promotion. In consequence, such solid wastes were over the carrying capacity because of sanitary landfills which located in good land for agriculture, paddy areas and non-steep slope areas. Every administer of the local administration offices really need to solve those problems but the success seems far distance to get the achievement due to politically discontinued measures as well as the discipline of residents and visitors concerning with garbage disposal management plan.
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