TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Method: The method (M1) further comprises the steps of granulating, pelletizing or prilling the fertilizer material to produce a product suitable for conventional dry product handling, transport or use. In method (M1) and (M3): the exhaust gas contacting the waste material feedstock is at an initial temperature of 1100-1600 degrees F. The method (M3) further comprises the steps of granulating, pelletizing or prilling the dried material to produce a soil builder product suitable for conventional handling, transport or use. In method (M5), the manufacturing operation produces emission gases that contain greenhouse gases. The method (M6), comprises contacting the exhaust gases with the waste material feedstock in an enclosed system adapted to substantially prevent significant oxidation of the waste material feedstock. Preferred Components: In method (M1) and (M3): the waste material feedstock comprises at least 50 wt.% moisture. In method (M2) and (M4): the waste material feedstock comprises a moisture content of at least 50 (preferably 70) wt.%; the dried material comprises a moisture content less than 15 (preferably 10) wt.%; and the feedstock comprises an organic waste or inorganic waste. The apparatus (A1) further comprises a processing unit adapted for receiving the converted material from the dryer vessel and forming same into granular, pellet or prill form. In the apparatus (A1): the connection between the turbine and the dryer vessel is further adapted to direct essentially 100% of the gas turbine exhaust into the dryer vessel; the dryer vessel is adapted for drying or thermally treating a waste material feedstock by direct contact of the exhaust gases and the waste material feedstock to produce a converted material; the gas turbine comprises a gas turbine generator and a gas turbine electric generator; and the dryer vessel is adapted for indirect heating of the waste material feedstock by heat from the exhaust gases. The converted material comprises less than a detectable amount of each such undesired component. A product comprising the converted material are in the form of granules, pellets or prills suitable for conventional dry product handling, transport or use. In the portable system: the dryer unit comprises a gas turbine and a dryer vessel, where the gas turbine and dryer vessel are connected by an arrangement adapted to pass the gas turbine exhaust gases into the dryer vessel and adapted to preclude the introduction of air into the dryer vessel; and the processing unit is adapted to produce the product in the form of pellets, granules or prills. The portable system comprises: a first skid-mounted unit comprising the gas turbine which comprises a generator adapted for producing electricity; a second skid-mounted unit comprising the dryer vessel adapted for connection to the gas turbine generator to receive the gas turbine exhaust gases and to preclude the introduction of air into the dryer vessel; and a third skid-mounted unit comprising the processing unit. The portable system is lorry mounted or rail car mounted, where the portable system comprises units adapted to be configured to have a maximum width suitable for transport by lorry on conventional roadways and the maximum width of the units is 8-11 feet. The thermally treated material is in the form of granules, pellets or prills suitable for conventional handling, transport or use. In apparatus (A2): the combustion air intake is connected to the facility by a connector adapted to direct at least a portion of the exhausted ventilation air into the combustion air intake; and the exhaust of the gas turbine is connected to a dryer vessel adapted for receiving waste material feedstock. The gas turbine comprises a gas turbine generator. In apparatus (A3): the connection between the combustion air intake and the facility vent is adapted to receive substantially all the air exhausted through the vent; the connection between the dryer vessel and the gas turbine is adapted to substantially preclude the introduction of air into the dryer vessel; and the gas turbine air intake is connected to the facility vent. EXAMPLE - No suitable example given.