Abstract: A wastewater treatment reactor includes an upper chamber 4 biomass therein and a lower chamber including a combination filtering/aerating unit 6 having a gas inlet 9 and a discharge outlet 10 for purified water. In operation, wastewater enters the upper reactor chamber via delivery pipe 12 and is mixed with biomass. During a filtering mode, the wastewater then enters the porous hollow body 7 defining a membrane unit 6 and is filtered thereby. In an aerating mode, gas travels across the membrane in an opposite direction freeing the membrane of biomass lodged therein. A heat exchanger 16 can be provided for exchanging heat energy between the wastewater input and the purified water output. A control device for regulating gas flow, wastewater flow, and pH may also be provided including pressure, pH and oxygen content measurement. A channel 7a may be provided for adding a cleaning medium and also an absorbent reactor 13 for treating waste air.

Abstract: This clarification plant consists of a circulating reactor in a housing which has a treatment area and a sedimentation area and which is characterized by at least one gas-input element and at least one treatment element which interlock with each other; in the gas input element, the water to be purified is highly enriched with oxygen and subsequently undergoes strong turbulence in the treatment element. The gas input elements and the treatment elements are modularly constructed out of disk-shaped components so that the clarification plant can be scaled as desired. The main purification is done by means of biological reduction processes in micro-organisms which are specifically introduced or cultivated.

Abstract: Roulette-type game apparatus comprising a housing consisting of a base and a transparent hood, a disc for providing a plurality of game fields, a drive actuating and attenuating mechanism consisting of a rotatably mounted drive spindle, a weight slidable along this spindle and an attenuating plate, and indicators such as dice or balls freely movable within said housing between the hood and the game field.