Abstract:
A store for gravity de-watering slurry has a first space (2, 44, 54) and a second space (13, 45, 55) separated by a water-permeable wall. Water can only flow out from the second space via means, such as a weir (A, B, 62) which can be gradually lowered, such that as the solids settle the weir can be reduced and at each stage the clear top layer of water be released. Flow of slurry from the first to the second space causes progressive deposition of solids in the interstices of the wall, thus improving the filter action.
Abstract:
The present invention relates to a method and filter device based on adapting the filtration to take place on essentially vertical filter surfaces. The filter elements are advantageously made of mineral fiber. The footprint of a filter plant will be essentially reduced thus permitting the placement of the filter in a closed space. This approach is capable of avoiding the degrading effects of naturally occuring impurities and sunlight on the raw water quality. Moreover, the maintenance of the filter becomes easier and its intervals between maintenance will be extended.
Abstract:
This invention lies in the field of on-site sewage and wastewater treatment. Standard on-site septic systems require special soil and groundwater conditions with large lot sizes. This invention comprises a method and device for complete treatment of septic tank effluent or other contaminated water by contriving for it to flow in an ultra-thin film over a surface treatment medium such as fabric or sand, providing diffusive aeration, biological reaction, and physical filtration on a molecular scale. The device transfers contaminated water from a container (48) to a final collector (42), completely purifying the liquid in the process. The purified effluent can then be reused for household, industrial, irrigation or other uses, or disposed of as normal surface run-off in streams or lakes. To increase efficiency, said container encloses a progressively more finely pored media (18, 22, 26, 28, 32) precisely situated with effluent seeping gradually through progressively finer pores to provide effective pretreatment.
Abstract:
A filter pad for use in a dewatering container is presented. The filter pad is configured to fit within the interior cavity and substantially line the interior surfaces. Material, which is usually liquids and slurries, is added to the container with the filter in place and gravity is used to filter the sediment, while the water is released through a release nozzle. The solids are retained in the filter pad for later disposal. The filter pad has a portion that can be selectively opened and is configured for placement substantially adjacent the door to permit selective egress of contents of the interior cavity.
Abstract:
A method and device for complete treatment of septic tank effluent or other contaminated water by contriving for it to flow in an ultra-thin film over a surface treatment medium such as fabric or sand. It provides diffusive aeration, biological reaction and physical filtration on a molecular scale.The device transfers contaminated water, or other liquid, from a container to a final collector completely purifying the liquid in the process. The purified effluent can then be reused for household, industrial, irrigation or other uses, or disposed of as normal surface run-off in streams or lakes.To increase efficiency, said container encloses a progressively more finely pored media precisely situated with effluent seeping gradually through progressively finer pores to provide uniquely effective pretreatment.
Abstract:
Modules for use in forming rigid filter beds by laying a plurality of the modules upon a planar base comprise a bottom grid unit to the top of which is fixed a rigid, porous layer. The grid unit has several intersecting series of strip elements with structured portions to promote drainage of liquid through and away from the porous layer. The grid unit may also include portions to insure interlocking of the top porous layer thereto.
Abstract:
An eductor truck for removing debris from catch basins which is provided with adequate storage facilities, improved safety features and improved door opening features.
Abstract:
The invention relates to a process for the disposal of bauxite processing wastes comprising the steps of:(a) filtering the bauxite muds in suspension coming from the washing decanter,(b) continuously washing the dehydrated filtration cake on the filter with hot water with recycling of the liquid phase containing the greater part of the soda into the basic chemical process of the bauxite treating plant.(c) treating the mud cake separated from the filter with sea water to refluidizing the muds and to neutralize the soda residues still present; and(d) conveying the inert and neutralized mud suspension, mixed with sand residual from bauxite processing in filling basins; the invention relates also to a containment basin for the exhausted bauxites obtained with the process constituted of several basin units, singularly comprising a trapezoidal cross-sectioned containment structure or embankment, elevated above sea level, with inner core of permeable sand, lined with "tout-venant" broken rocky material, contained on the outside by large dimension boulders, on the upper part of which is placed the distribution piping of the muds, with introduction of these latter in the basin unit in several different points and provided with a drainage layer on the base.