In-Situ System for Aerobic Heat Treatment of Biodegradable Organic Waste

An in-situ system for aerobic processing of biodegradable organic waste, said system comprising a bioreactor, that connects to an input device for Biodegradable Organic Waste (2), a heating device (3) And a transmission (4) which is powered by a motor mechanism (5) characterized in that the bioreactor (1) constituted by a decomposition chamber (6) which is constituted by a plate having a parabolic shape (14) that is joined at its ends by a pair of parallel plates (15 and 16), one on each side, closing off in this way the decomposition chamber around its sides, and closing off the chamber at the upper part where a first lid (19) is located which contains four holes (20, 21, 22, 23), the two first holes (20, 21) are located at the ends and are connected to an air extraction device (11). The third hole (22) located in the center, is circular, with a peripheral cylindrical wall that extends upwards from the first lid and at the perimeter of the third hole at said wall it connects to the input device for biodegradable organic waste (2) and the fourth hole (23) located at the end which is opposite any of the two holes at the end, the perimeter of which is greater than the central hole and has a second lid (27) for the extraction of the compost generated;

• in turn, within the interior of the decomposition chamber (6), an extraction device (11) is located, a mixing mechanism (10) and a heat transfer device (7), wherein the mixing mechanism (10), consists of a hollow shaft (9) placed lengthwise and supported by the lateral walls (15, 16) of the decomposition chamber;
• which support oppositely oriented coils via radial bars, adjacent to each other;
• the hollow shaft protrudes from the side walls of the decomposition chamber and at one of the ends a transmission (4) is connected that transmit rotation at a speed of 2 rpm;
• the transmission (4) is powered by a motor mechanism (5);
• each mixing event is carried out in cycles, where each cycle includes three complete revolutions or turns. Two turn in a clockwise manner and the third turn is counterclockwise. The mixing mechanism shaft is in turn part of the heat transfer device (7), since through it the hot fluid circulates permitting convection-conduction heat transfer to a sawdust matrix held inside the decomposition chamber;
• the heat transfer device (7) that is located inside the decomposition chamber is comprised of a plurality of mini-tubes (8) having a length which is smaller than the decomposition chamber and placed lengthwise and in direct contact with each other adopting the form of the decomposition chamber, said mini-tubes are embedded in a layer of insulating material attached to the inside surface of the decomposition chamber's parabolic plate which avoids the transfer and loss of heat to the outside of the decomposition chamber, in such a way that all the heat transferred through the mini-tubes is used to evaporate the water than enters the bioreactor;
• 50% of the mini-tubes are arranges in such a way that the exterior surface is exposed to direct contact with the sawdust matrix and the other 50% are embedded in the layer of insulating material;
• the ends of the mini-tubes are also soldered at a 90° angle to a curved hot fluid guide tube (28) that allows the hot fluid coming from a storage tank (13) to be fed to the inside of the mini-tubes and shaft as well as being soldered to a curved cold fluid collector tube (29), to direct the fluid to the solar heater (12);
• and the transmission (4) is placed at this same end. Both curved guide (28) and collector (29) tubes are embedded in the decomposition chamber and are threaded (43) to connect to a guide tube and the hot and “cold” fluid collector tube, respectively;
• the air extraction device (11) is made up of a first and second extraction tube (24, 25) and an extractor (41). The extraction tubes are connected to the holes in the ends (20, 21) of the extraction lid (19) and converge into a single extractor tube (42) that extends to the discharge point.