NOVELTY - Continuous treatment of biosolids (I) comprises forming an acidified paste of dewatered biosolids and one or more first acids; adding the acidified paste to a pressure vessel; adding one or more second acids and one or more bases to the pressure vessel to combine with the acidified paste and form a mixture; subjecting the mixture to a temperature and pressure for a retention time; removing the mixture from the pressure vessel; and drying the mixture to form treated and dried biosolids.    USE - The method is useful for the treatment of biosolids comprising one or more of municipal biosolids, heat-dried biosolids, pharmaceutical fermentation wastes, microbial digests of organic products, food stuffs, food byproducts, animal manures, digested animal manures, organic biosolids and/or biosolids containing microorganisms (claimed) to produce organically-augmented inorganic fertilizer, which is useful as fertilizer. No biological data given.    ADVANTAGE - The method is effective, efficient and economical for treating biosolids. The method provides high-value, nitrogen-containing, slow-release, organically-augmented inorganic fertilizer that is competitive with less valuable or more costly conventional commercially manufactured fertilizers. The process involves conditioning traditional waste-water biosolids and processing the conditioned biosolids continuously in a high throughput manufacturing facility. The exothermic design and closed loop control of the primary reaction vessel decreases significantly the amount of power necessary to run a manufacturing facility. The process utilizes green technologies to facilitate decreased waste and enhanced air quality standards over traditional processing plants. The fertilizer produced from recovered biosolid waste is safe and meets or exceeds the United States Environment Protection Agency (USEPA) Class A and Exceptional Quality standards and is not subject to restrictions or regulations. The method minimizes the amount of water needed.    DETAILED DESCRIPTION - Continuous treatment of biosolids comprises forming an acidified paste of dewatered biosolids and one or more first acids; adding the acidified paste to a pressure vessel such that the pressure vessel maintains a head space where the head space has a predetermined pressure; adding one or more second acids and one or more bases to the pressure vessel to combine with the acidified paste and form a mixture; subjecting the mixture to a temperature and pressure for a retention time, where the temperature and moisture content of the mixture are determined by the head space pressure; removing the mixture from the pressure vessel; and drying the mixture to form treated and dried biosolids. INDEPENDENT CLAIMS are included for:    (1) a system for processing biosolids into fertilizer, comprising: a first mixer that blends the biosolids with concentrated acid and oxidizing agents and converts the biosolids into a pumpable paste, a pressure vessel with a head space pressure that receives the pumpable paste from the first mixer, where the pressure vessel retains the pumpable paste at a predetermined pressure and temperature as determined by the head space pressure and for a period of time, a second mixer that receives the pumpable paste from the pressure vessel, where the pumpable paste is mixed with a hardening agent, and a granulator to break the hardened paste into pelletized fertilizer;    (2) a method for treatment of biosolids comprising combining dewatered biosolids with an acid to form a mixture, injecting the mixture and steam into a pressure vessel containing a pressurized head space, subjecting the mixture to a predetermined temperature and pressure for a retention time, where the temperature and moisture content of the mixture are determined by the head space pressure, removing the mixture from the pressure vessel after the retention time, and drying the mixture;    (3) biosolids processed by the method; and    (4) a pressure vessel for processing biosolids comprising a head space and many valves that control head space pressure, where head space pressure determines the temperature and moisture content of biosolids within the vessel, and further comprising gauges that indicate one or more of temperature, pressure, pH, and nitrogen content of the biosolids within the pressure vessel.