225results about How to "Reduce filtration efficiency" patented technology

Electret filter media comprising a nonwoven web of thermoplastic nonconductive microfibers having trapped charge, said charge provided by (1) subjecting the nonwoven web to a corona treatment, followed by (2) impingement of jets of water or a stream of water droplets on the web at a pressure sufficient to provide the web with filtration enhancing electret charge and (3) drying the web. This electret filter media may be used in a respiratory mask to provide extraordinarily good filtration properties.

A method and apparatus for filtering gas (58) with a moving granular filter bed (48) involves moving a mass of particulate filter material (48) downwardly through a filter compartment (35); tangentially introducing gas into the compartment (54) to move in a cyclonic path downwardly around the moving filter material (48); diverting the cyclonic path (58) to a vertical path (62) to cause the gas to directly interface with the particulate filter material (48); thence causing the gas to move upwardly through the filter material (48) through a screened partition (24, 32) into a static upper compartment (22) of a filter compartment for exodus (56) of the gas which has passed through the particulate filter material (48).

Provided is a suction type filtering-condensing apparatus which does not reduce filtering efficiency and can guarantee filtering performance. The apparatus comprises a filtering-condensing bath (12) for housing treated fluid including filtering-condensing objects, and a plurality of filter plates (14) arranged in the filtering-condensing bath (12) and extending vertically along the filtering-condensing bath (12). Each of the filter plates (14) includes a support plate (50) vertically rugged in its surface and formed into a net shape, and a bag-shaped filter cloth (18) for housing the support plate (50), so that a filter chamber (76) is formed by the inner face of the filter cloth (18) and the support plate (50), and so that a vertically extending main passage for the filtrate is formed between the inner face of the filter cloth (18) and the recess of the support plate (50). Further comprised are a suction means (16) for sucking the filter cloth (18) through the filtering-condensing bath (12), a filter cloth bulging means (20) for bulging the filter cloth (18) through the filtering-condensing bath (12), and a filtrate discharging pipe (38) communicating at its one end with the filter chamber (76). The suction type filtering-condensing apparatus is characterized in that the transverse length of the filter cloth (18) is set larger than the transverse length of the support plate (50), and in that a temporary auxiliary passage (99) for the filtrate is formed, at the time of filtration and condensation of the filtering-condensing objects in the filtering-condensing bath(12)undera predetermined negative pressure according to the suction means (16), to communicate with the filter chamber (76) and to extend vertically of the filter chamber (76).

The present invention relates to a method for producing fermentation product from various carbon sources containing glycerol using Corynebacteria. More particularly, the present invention relates to a method for producing fermentation product from carbon sources containing glycerol or a part of glycerol with high yield and high productivity, by fermenting Corynebacteria introduced with the foreign gene glpDFK facilitating the use of glycerol and accumulating industrially useful amino acids in the culture medium.