for neutralizing the drained disinfectant liquid the pump 90 is preferably a chopper pump and is more preferably a high flow rate pump and most preferably an approximately 200 gallon per minute gpm pump an example of a suitable 200 gpm pump is a model number he3g6sec 055 chopper pump manufactured by vaughn company in montesano wash in some cases separate pumps may be used to recycled the disinfectant liquid and to spray the disinfectant liquid onto the waste material when two pumps are used the pumps are preferably approximately 90 gallon per minute gpm pumps a continuous gas monitoring system 38 monitors the liquid disinfectant level in the main solution tank 18 and composition i e strength of the liquid disinfectant and controls the generation of liquid disinfectant see fig8 for example chemicals may be introduced into a flow into the pump 90 at a chemical manifold 112 to generate liquid disinfectant an example of a continuous gas monitoring system 38 is the system described in u s pat no 5 269 832 for u201c method and apparatus for continuously measuring the concentration of chemicals in solution u201d the 39 832 patent is herein incorporated by reference the auger 20 is preferably a shaftless auger residing in an auger housing 21 supported by an auger strut 23 and is powered by an auger.