TECHNOLOGY FOCUS - ENVIRONMENT - Preferred Method: The sludge biodrying involves providing a carbon containing first material; providing a nitrogen containing compostable sludge; forming a mixed sludge consisting essentially of the first material and the compostable sludge and having a C:N ratio of less than 15:1 by weight; introducing the mixed sludge into a composting bay; maintaining an average C:N ratio of at least 8:1 by weight in the mixed sludge in the composting bay; providing conditions to facilitate the formation of compost from the mixed sludge; removing the compost from the composting bay; and recycling a portion of the compost as the first material; where forming the compost involves aerating the mixed sludge in the composting bay; mechanically agitating the mixed sludge in the composting bay; providing conditions to facilitate a heating of the mixed sludge within the composting bay; and reducing a moisture content of the mixed sludge within the composting bay. The method (M1) further involves removing particles below a predetermined size from the first material prior to forming the mixed sludge; providing a source of a compostable sludge consists of providing a source of dewatered sewage sludge; removing moisture from the mixed sludge; providing a portion of the compost removed from the composting bay as a combustible fuel; forming the compostable sludge from pre-screened wastewater; sensing a temperature of the mixed sludge to at least one position in the composting bay; generating a signal in response to the temperature; receiving the signal at a controller; actuating a ventilation system to conduct air into the mixed sludge when the temperature of it rises above a preset value; initiating an agitation of the mixed sludge when the temperature of it falls below a preset value; sensing a moisture level of the mixed sludge to at least one position in the composting bay; generating a signal in response to the moisture level; receiving the signal at a controller; adding moisture to the mixed sludge when the moisture level of it falls below a preset value; and actuating a ventilation system to conduct air into the mixed sludge when the moisture level of it rises above a preset value. In the method (M1), providing conditions to facilitate a heating of the mixed sludge further involves decomposing the mixed sludge by a digestive action of microorganisms. In the method (M1), heating the mixed sludge involves heating the mixed sludge to a temperature for a time sufficient to achieve destruction of pathogens within the mixed sludge or to deactivate pathogens within the mixed sludge; maintaining a temperature of the mixed sludge of at least 55 degrees C for a period of at least 72 hours; heating the mixed sludge to a temperature sufficient and for a time sufficient for Vector Attraction Reduction; and heating the mixed sludge to at least 40 degrees C for at least 14 days. The time and temperature at which the mixed sludge is treated satisfies the equation D= 131700000/10(0.14t) (where, D is time in days; and t is temperature in degrees Celsius). The pH of the mixed sludge introduced into the composting bay is less than 7 (preferably less than 6). The mixed sludge is maintained aerobically in the composting bay. Agitating the mixed sludge involves displacing the mixed sludge in the composting bay in a direction from a first end of the composting bay to a second end of the composting bay. The mixed sludge has a C:N ratio of less than 15:1 when introduced into the composting bay. Preferred Components: The first material consists of compost. The first material consists of heat dried undigested sewage sludge. The nitrogen containing compostable sludge consists of dewatered sewage sludge. The first material consists of a non-cellulosic material. The first material consists of compost removed from the composting bay. Preferred Composting Facility: The composting facility further comprises an odor control system; at least one of an ammonia scrubber and a biofilter; an analyzer configured to analyze a portion of the mixed sludge and to indicate a concentration of a specified element within the portion of the mixed sludge; a moisture content analyzer configured to analyze the moisture content of organic waste material to be composted and output a first result indicative of the moisture content of the organic waste material; a controller adapted to receive the first result and the second result output by the moisture content analyzer and to calculate and output a ratio of compost to organic matter to mix to form the mixed sludge based on the first result and the second result; and a position sensor configured to monitor a position of the compost handling machine. The composting facility further comprises a temperature sensor in thermal communication with a section of the composting bay and configured to generate a signal in response to a temperature of the mixed sludge in the section; and a control system connected to the temperature sensor and to the position sensor and configured to receive a signal from the temperature sensor and from the position sensor and to actuate the ventilation system to conduct air into the mixed sludge in the section when the temperature of the mixed sludge in it is above a preset value and the compost handling machine is positioned in the section. The composting facility further comprises a humidity sensor configured to generate a signal in response to a level of humidity in the composting facility; and a control system connected to the humidity sensor and configured to receive the signal from the humidity sensor and to actuate a ventilation fan based upon a comparison of the signal with a predetermined value. Preferred System: The ventilation system comprises a temperature sensor located in the bay configured to sense the temperature of the mixed sludge and to generate a signal in response to the temperature; and a control system connected to the temperature sensor configured to receive the signal and to actuate the ventilation system to conduct air into the mixed sludge when the temperature of it rises above a preset value. The ventilation system maintains a desired temperature profile in the mixed sludge. The control system is further configured to receive a signal from a position sensor configured to monitor a position of the compost handling machine and to increase a speed of the ventilation fan proximate a section of the composting bay when the compost handling machine is located in that section of the composting bay. The compost handling machine is further adapted to move the mixed sludge through the interior of the composting bay. The moisture content analyzer is further configured to analyze the moisture content of compost and output a second result indicative of the moisture content of the compost. EXAMPLE - No suitable example is given.