Abstract: A television receiver having an integral design without spoiling the external appearance includes a panel sheet (4) on which an operation unit (6) corresponding to the operation unit arranged in the cabinet, a filter unit (7) corresponding to the light sensor unit, and a sound output unit (8) corresponding to the sound output unit which are formed integrally and is attached to the cabinet of the television receiver.

Abstract: A body of water is purified by filtering its water both physically and biologically through a filter layer preferably consisting of a floating filter layer, and by contacting aerobic bacterial flocks, which are formed in the filter layer in time, with the mud in the river bottom typically placed in an anaerobic condition so that denitrification of the river water by denitrifying bacteria may be promoted. Thus, the present invention assists the natural biological purification process, and can improve The transparency of the water, reduce BOD and COD, promote denitrification to a sufficient extent to make the water liveable for fish, and trap low concentration toxic chemical substances such as insecticides and herbicides into the bacterial flocks.

Abstract: In a process for contacting gas and liquid, gas and liquid are simultaneously passed through a layer of irregularly shaped pieces of foamed plastic material having diameters in a range between 1 mm and 50 mm. Since the gas and the liquid are passed through a contact region filled with particles of foamed plastic material, persistence of fine bubbles is increased due to the generation of flow turbulence preferably combined with high pressure. Further, the foamed plastic particles have a low specific weight and is highly durable, it can be used for an extended period of time without losing its processing capability.

Abstract: Waste liquid is cleaned or purified primarily by removing organic contaminants therefrom by combination of a floating filter layer and an anaerobic biological process. The floating filter layer consists of irregularly shaped small pieces of lipophilic substances such as polypropylene and other plastics, and the organic contaminants are on the one hand filtered by this floating filter layer, and on the other hand decomposed on the surface of the small pieces forming the floating filter layer through anaerobic biological process. The system of the present invention is economical to build, and can be used as a part of sewage and waste liquid processing installations either for industrial or for household use.

Abstract: Melting and cracking of amorphous polyolefin are carried out with a relatively small quantity of heat consumption and also with easiness in separating sludge, in converting it into oil by maintaining amorphous polyolefin at a high temperature of about 130.degree. - 300.degree. C for a relatively long time alone or together with a petroleum hydrocarbon oil to reduce the viscosity of the resultant melt to 5 - 250 CP, spraying the resultant melt upon lumps of amorphous polyolefin, separating impurities in the lumps as sludge, cracking the resultant molten mixture at a temperature of about 250.degree. - 450.degree. C and recovering oily products. For that purpose an apparatus comprising a combination of a holding tank for melt of amorphous polyolefin, a vessel for melting amorphous polyolefin equipped with a perforated plate or a wire-netting, a revolving shaft, a stirrer, etc.

Abstract: Melting and cracking of amorphous polyolefin are carried out with a relatively small quantity of heat consumption and also with easiness in separating sludge, in converting it into oil by maintaining amorphous polyolefin at a high temperature of about 130.degree. - 300.degree.C for a relatively long time alone or together with a petroleum hydrocarbon oil to reduce the viscosity of the resultant melt to 5 - 250 CP, spraying the resultant melt upon lumps of amorphous polyolefin, separating impurities in the lumps as sludge, cracking the resultant molten mixture at a temperature of about 250.degree. - 450.degree.C and recovering oily products. For that purpose an apparatus comprising a combination of a holding tank for melt of amorphous polyolefin, a vessel for melting amorphous polyolefin equipped with a perforated plate or a wire-netting, a revolving shaft, a stirrer, etc.