| 摘要 |
<p>446,066. Deodorizing gases. BLUNK, H., 7, Mozartstrasse, Essen, Germany. Sept. 6, 1935, No. 24905. Convention date, Dec. 24, 1934. Addition to 412,065. [Class 81 (i)] [See also Group I] The method described in the parent Specification for treating sewage in which the liquid passes through a filter bed directly enclosed laterally and covered by a roof is modified in that air, instead of being passed upwardly through the filter in countercurrent to the sewage is passed downwardly with it. The sewage is supplied to the filter c of granulated lava by a distributer h and air is forced in through a pipe d. After passing through the bed the air separates and is discharged through a pipe e and the liquid passes to a tank l. Foul gases, given off as the liquid is distributed are drawn through the bed and in presence of the air are broken down bacterially, the gas discharged through the pipe e being free from odour. Foul air or gas mixtures containing oxygen, such as gases from manure or glue factories, fish and hotel kitchens, gases containing sulphuretted hydrogen or gases from other sewage apparatus, may be deodorized by downward passage through the filter in company with sewage or water containing nutrients for the micro-organisms after the bed has been inoculated with suitable bacteria by treatment with sewage or activated sludge. Additional air or oxygen is supplied if necessary. Liquid from the tank may be passed to a vessel g, in which it is treated with nutrient material from a vessel k, and then raised to the distributer h by a pump f. Insects carried through the pipe e by the deodorized gas may be trapped in nets or sieves. To prevent the growth of fungi in the bed, hydrogen sulphide may be added to the air or gas supplied.</p> |
