Process and apparatus for treating biosolids from wastewater treatment

An apparatus for autothermal aerobic treatment of waste water treatment biosolids comprising:

• a reactor having an inlet for the introduction of at least one biosolids;
• a jet aeration device affixed to the reactor, said device comprising:
• an air header having one or more openings through which a oxygen-containing gas transported through the air header may exit the air header;
• a liquid header running parallel to and/or concentric with the air header and having one or more openings through which a biosolids solution transported through the liquid header may exit the liquid header;
• an outer nozzle extending from the liquid header and having an opening on its side;
• an inner nozzle from the liquid header and contained extending within the outer nozzle;
• one or more air passage connection from the air header to the outer nozzle which connects the air header to the liquid header and provides a closed path for air from the air header to travel to the outer nozzle and enter the outer nozzle through its side opening;
• and liquid from the liquid header are mixed in the outer nozzle;
• an air distribution pipe connected to the air header, which provides an oxygen-containing gas from outside the reactor;
• at least one aeration blower connected to the air distribution pipe such that said aeration blower forces the oxygen-containing gas through the air distribution pipe and into the air header;
• a liquid outlet located at or near the bottom of the reactor, which allows biosolids solution to exit the reactor;
• at least one motive pump connected to the liquid outlet such that biosolids solution is withdrawn from the reactor by the motive pump;
• a motive pump conduit leading from the motive pump to the liquid header such that biosolids solution is pumped through the conduit into the liquid header and forced through the inner nozzle by force of the motive pump;
• means for sensing a physical property of the solution within the reactor;
• and
• means for automatically controlling the physical property, said automatic control means being operatively attached to the means for sensing and the jet aeration device such that based on the physical property of the biosolids solution in the reactor as measured by the means for sensing, the automatic control means will adjust the mixture of biosolids solution and oxygen containing gas through the jet aeration device in order to adjust the physical property of the biosolids solution in the reactor.