Abstract: A process for vitrifying waste material containing environmentally hazardous metals or metal compounds includes drying a waste material using a flash dryer, where the drying is carried out at a temperature low enough to prevent volatilization of hazardous metals and metal compounds contained in the waste material. Preferably, more than about 95% of the water is removed form the waste material. The dried waste material is transferred from the flash dryer into a melting vessel, melted, collected and cooled to form a vitrified mass of waste material. Gases produced during the process of the invention are filtered, treated, and released into the atmosphere.

Abstract: A process for vitrifying waste material containing environmentally hazardous metals or metal compounds includes drying a waste material using a flash dryer, where the drying is carried out at a temperature low enough to prevent volatilization of hazardous metals and metal compounds contained in the waste material. Preferably, more than about 95% of the water is removed form the waste material. The dried waste material is transferred from the flash dryer into a melting vessel, melted, collected and cooled to form a vitrified mass of waste material. Gases produced during the process of the invention are filtered, treated, and released into the atmosphere.

Abstract: A projectile substance is pneumatically propelled. The projectile substance is inserted into a longitudinal bore (23) of a barrel (22) and a rupture disk (54) is attached to a first end of the barrel (22). Next, the first end of the barrel is coupled to a first end of a pneumatic reservoir (26) having a chamber (27) therein. The rupture disk (54), as attached, acts to form a seal between the longitudinal bore (23) and the chamber (27). Then, a gas is introduced into the chamber (27) until a sufficient pressure is attained within the chamber (27) to rupture the disk (54). When the disk (54) ruptures, the gas in the chamber (27) rushes into the longitudinal (23) bore with sufficient force to propel the projectile substance out of the barrel (22).

Abstract: Improved clarity in treated wastewater is achieved by adding a flocculating agent following screening by fine mesh screening means, preferably a centrifugal screen separator. The effectiveness of the separator is improved, in turn, by preceding it in the direction of liquid flow by a corrugated plate interceptor to remove greases and oils. Preferably, fine mesh screening is carried out by two separate screening devices, one being a high liquid volume centrifugal screen strainer, and the other being a mechanically self-cleaned low liquid volume device. Wastewater is delivered to a thickener, preferably a corrugated plate separator, the thickened product being delivered to the low liquid volume device, and the supernatant being delivered to the centrifugal screen strainer. The corrugated plate interceptor not only acts as a thickener, but also eliminates grease and oil, which would interfere with the operation of the centrifugal screen strainer.

Abstract: Improved clarity in treated wastewater is achieved by adding a flocculating agent following screening by fine mesh screening means, preferably a centrifugal screen separator. The effectiveness of the separator is improved, in turn, by preceding it in the direction of liquid flow by a corrugated plate interceptor to remove greases and oils. Preferably, fine mesh screening is carried out by two separate screening devices, one being a high liquid volume centrifugal screen strainer, and the other being a mechanically self-cleaned low liquid volume device. Wastewater is delivered to a thickener, preferably a corrugated plate separator, the thickened product being delivered to the low liquid volume device, and the supernatant being delivered to the centrifugal screen strainer. The corrugated plate interceptor not only acts as a thickener, but also eliminates grease and oil, which would interfere with the operation of the centrifugal screen strainer.

Abstract: Improved clarity in treated wastewater is achieved by adding a flocculating agent following screening by fine mesh screening means, preferably a centrifugal screen separator. The effectiveness of the separator is improved, in turn, by preceding it in the direction of liquid flow by a corrugated plate interceptor to remove greases and oils. Preferably, fine mesh screening is carried out by two separate screening devices, one being a high liquid volume centrifugal screen strainer, and the other being a mechanically self-cleaned low liquid volume device. Wastewater is delivered to a thickener, preferably a corrugated plate separator, the thickened product being delivered to the low liquid volume device, and the supernatant being delivered to the centrifugal screen strainer. The corrugated plate interceptor not only acts as a thickener, but also eliminates grease and oil, which would interfere with the operation of the centrifugal screen strainer.

Abstract: An improved electrode assembly for use in electrolytic flotation for wastewater treatment comprises a series of overlying layers of foraminous mesh arranged in substantially horizontal planes, wherein electrically conductive mesh layers constituting the anode and cathode are maintained in closely spaced relationship with each other, but are prevented from coming into direct contact with each other by one or more insulating mesh layers.