Abstract: Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water can be concentrated and prepared for destruction in a pretreatment phase. Following annihilation of the PFAS in supercritical conditions to levels below 5 parts per trillion (ppt), the water effluent can be used to recover heat, returned to sub-critical conditions, and then released back into the environment.

Abstract: The drill bit according to the present invention provides an advanced, carbide tipped, coolant feed, two-fluted deep hole drill capable of drilling a wider variety of materials deeper and faster than presently known drills of similar construction. Specifically, a deep hole drill bit includes a cutting tip with a fitting end having "V" shaped profile with an apex edge extending along a plane which is substantially aligned with the cutting edges of the cutting tip. The drill bit additionally includes a drill shaft having a distal end adapted to be matingly fitted to the fitting end of the cutting tip. This joint structure allows the shaft to naturally push behind the drill tip to provide enhanced strength and support during drilling. In this manner, the contact area between the drill tip and the shaft is maximized, with the contact area being greatest towards the base of the "V", where the compressive forces are also greatest, i.e., along the cutting edges.