Abstract: A system and method for biological digestion of waste materials in a fluid are provided. The system comprises a tank that is operable in batch mode or in a flow-through mode. A tank and liquid-gas exchanger are provided. Fluid and gas from both the tank and exchanger may be selectively routed and re-routed to desired locations within the system to achieve and optimize aerobic and anaerobic digestion processes occurring within the tank or tanks.

Abstract: This is a wall mounted machine which has one moving part and can be adjusted to the height of the person using it. It is a machine which can replicate any form of combat which uses punches, elbows and kicks. The machine is mounted to a wall by way of the frame. The rotating bar has two targets at each end. The targets are double sided and are covered with padding. This means the machine has four targets front and back of each pad.