A method of manufacturing PET nurdles, said method comprising: providing a multi-screw extruder comprising a multi-rotating screw section that comprises: (i) a first satellite screw extruder, said first satellite screw extruder comprising a first satellite screw (425A-H) that is mounted to rotate about a central axis of said first satellite screw; (ii) a second satellite screw extruder, said second satellite screw extruder comprising a second satellite screw (425A-H) that is mounted to rotate about a central axis of said second satellite screw; and (iii) a pressure regulation system that is adapted to maintain a pressure within said first and second satellite screw extruders below about 18 millibars; using said pressure regulation system to reduce a pressure within said first and second satellite screw extruders to below about 18 millibars; while maintaining said pressure within said first and second satellite screw extruders below about 18 millibars, passing a melt comprising recycled PET through said multi-screw extruder so that: a first portion of said melt passes through said first satellite screw extruder, and a second portion of said melt passes through said second satellite screw extruder; after said step of passing said melt of recycled PET through said multi-screw extruder, pelletizing said polymer melt into a plurality of PET nurdles, characterized in that pelletizing said polymer melt comprises: passing said polymer melt through a cooling bath to form a plurality of polymer strands, said cooling bath is configured to maintain a temperature of between about 140 degrees Celsius and about 230 degrees Celsius within said cooling bath to at least partially harden said polymer melt into said plurality of polymer strands; and after said step of passing said polymer melt through said cooling bath, forming said plurality of polymer strands into said plurality of PET nurdles. providing a multi-screw extruder comprising a multi-rotating screw section that comprises: (i) a first satellite screw extruder, said first satellite screw extruder comprising a first satellite screw (425A-H) that is mounted to rotate about a central axis of said first satellite screw; (ii) a second satellite screw extruder, said second satellite screw extruder comprising a second satellite screw (425A-H) that is mounted to rotate about a central axis of said second satellite screw; and (iii) a pressure regulation system that is adapted to maintain a pressure within said first and second satellite screw extruders below about 18 millibars; (i) a first satellite screw extruder, said first satellite screw extruder comprising a first satellite screw (425A-H) that is mounted to rotate about a central axis of said first satellite screw; (ii) a second satellite screw extruder, said second satellite screw extruder comprising a second satellite screw (425A-H) that is mounted to rotate about a central axis of said second satellite screw; and (iii) a pressure regulation system that is adapted to maintain a pressure within said first and second satellite screw extruders below about 18 millibars; using said pressure regulation system to reduce a pressure within said first and second satellite screw extruders to below about 18 millibars; while maintaining said pressure within said first and second satellite screw extruders below about 18 millibars, passing a melt comprising recycled PET through said multi-screw extruder so that: a first portion of said melt passes through said first satellite screw extruder, and a second portion of said melt passes through said second satellite screw extruder; after said step of passing said melt of recycled PET through said multi-screw extruder, pelletizing said polymer melt into a plurality of PET nurdles, characterized in that pelletizing said polymer melt comprises: passing said polymer melt through a cooling bath to form a plurality of polymer strands, said cooling bath is configured to maintain a temperature of between about 140 degrees Celsius and about 230 degrees Celsius within said cooling bath to at least partially harden said polymer melt into said plurality of polymer strands; and after said step of passing said polymer melt through said cooling bath, forming said plurality of polymer strands into said plurality of PET nurdles. passing said polymer melt through a cooling bath to form a plurality of polymer strands, said cooling bath is configured to maintain a temperature of between about 140 degrees Celsius and about 230 degrees Celsius within said cooling bath to at least partially harden said polymer melt into said plurality of polymer strands; and after said step of passing said polymer melt through said cooling bath, forming said plurality of polymer strands into said plurality of PET nurdles.