摘要:
A ditch check system and methods for storm water control are provided. The ditch check system can include a velocity-restricting component of geotextile fabric with one or more porosities configured to control velocities of storm water flows for sediment control and silt retention. The velocity-restricting component can have one or more reinforcing elements to provide additional support against tearing and/or undue movement, as well as attachment points for fastening the fabric to support members. The ditch check system can further include a front water seal and a rear scour guard attached to the velocity-restricting component, and which are substantially impermeable to vertical water flow to inhibit ditch scouring and prevent the flow of storm water under the ditch check system. To facilitate transportation, installation, and assembly, one or more of the components of the ditch check system can be supplied as a pre-assembled package.
摘要:
The invention refers to a sieve drum for an installation to remove material to be sieved from a liquid, especially sewage (1), in which case the sieve drum (4) has an opening (6) at least in a front side area (5), through which it can be refilled with a liquid that carries the material to be sieved. According to the invention, it is suggested that the sieve drum (4) should comprise a folded sieve wall (9) with many openings (6), in which case the sieve drum (4) has a support structure that fixes the sieve wall (9) exclusively in a clamping way. In addition, an installation to remove material to be sieved from a liquid, especially sewage (1), with a corresponding sieve drum is described.
摘要:
A filter assembly includes a horizontally extending buoyant member and a filter panel that extends vertically from the buoyant member, the filter panel defining a tortuous path for passage of water and a surface area for biofilm growth and capture of particles in the biofilm, the filter panel being flexible from a neutral shape and position under force, and being resilient to return to the neutral shape and position by structural rigidity after cessation of the force. The titter panel includes multiple parallel sections defined between parallel vertically extending slits. The parallel sections are flexible permitting opening of the slits. A protective cover faces away from the buoyant member opposite a direction in which the filter panel extends. The filter panel is folded over the buoyant member and the cover is folded over the filter panel.
摘要:
Apparatus for filtering and hydrologically regenerating streams comprising dams formed with filters for receiving pollutants which are passed through the filter and then into the holding basin upstream of the dam, before passing through conduits which carries the fluid through the dam. These conduits are normally open, but under conditions of unusual large quantities of fluid, as for example during heavy rains, the dam pass-through conduits close, and the water passes over the top of the dam. At certain periods when the pass-through conduits are closed and the level in the holding tank above the dam is higher than that in the filter chamber, the fluid passes up through the filter to backwash it, so that it is periodically cleaned and thus increases its efficiency and filtering ability.
摘要:
The invention refers to a sieve drum for an installation to remove material to be sieved from a liquid, especially sewage (1), in which case the sieve drum (4) has an opening (6) at least in a front side area (5), through which can be refilled with a liquid that also carries the material to be sieved. According to the invention, is suggested that the sieve drum (4) should comprise a folded sieve wall (9) with many openings (6), in which case the sieve drum (4) has a support structure that fixes the sieve wall (9) exclusively in a clamping way. In addition, an installation to remove material to be sieved from a liquid, especially sewage (1), with a corresponding sieve drum is described.
摘要:
A device for removing silt from flowing water by temporarily slowing the water enough to permit silt to settle naturally to the bottom is disclosed. The water may be slowed by a combination of increased depth and obstructions in the form of rough rocks and chain link fencing.
摘要:
A liquid gathering and transferring apparatus for gathering liquid from a liquid source containing a quantity of liquid having a liquid surface and containing debris and discharging the liquid into a liquid receiving location includes an intake chamber having a chamber discharge end in fluid communication with the liquid receiving location and a chamber structural end opposite the chamber discharge end and a chamber side wall extending between the chamber discharge end and the chamber structural end and a longitudinal series of liquid intake ports in the chamber side wall extending generally between the chamber discharge end and the chamber structural end, the intake ports being of generally increasing diameter along the chamber side wall toward the chamber structural end for minimizing liquid vortex formation at the intake ports; so that the intake chamber can be suspended below the liquid surface at a minimal depth where less debris is present and draw liquid with negligible vortex formation.
摘要:
Apparatus for collecting debris floating in a stream comprises collector means disposed astride the stream with a first part arranged to engage and intercept floating debris and with another part pivotally mounted downstream and above the surface of the stream, and lift means secured to the collector means adjacent the first part for controlling the elevation of the first part in accordance with variations in the level of the stream.