106 results about "Sediment control" patented technology

A sediment control roll includes a threshold member having large apertures therethrough, a hollow sediment collection chamber, and an outflow filter having small apertures therethrough. The sediment control roll can be used to collect sediment in runoff from a construction site, or to reduce removal of sediment from an existing land mass. The sediment control roll can for example be made by rolling up extruded polymeric netting with filter cloth attached thereto.

Sediment control devices and systems are provided. The devices are in the form of a multi-layered, fillable bag which generally includes an inner bag structured to contain a granular material, for example, gravel or stone, a separate reinforcement layer located outwardly of the inner bag, and a and an outer layer enclosing the reinforcement layer and having a sealable opening providing access to the inner bag. The devices may be provided pre-filled with the granular material. The devices provide an effective, durable system for filtering runoff water, controlling erosion and / or controlling sedimentation at a construction sight.

The present invention is directed to a lubricating oil for use in engines subjected to sustained severe load conditions, said lubricating oil comprising a base oil, and an additive package comprising one or more neutral / low TBN or a mixture of neutral / low TBN, and overbased / high TBN alkali or alkaline earth metal alkyl sulfonates, alkyl phenates, alkyl salicylates, an antioxidant selected from the group consisting of glycerine derivatives comprising glycerine grafted with a hindered phenol, hindered phenolic containing a thioether group, and mixtures thereof, optionally an additional conventional antioxidant and / or an organomolybdenum compound, and other additives, and to a method for enhancing the deposit formation resistance of a lubricating oil used in engines operated under sustained severe load comprising the addition to the lubricant of the aforesaid additive package.

The invention provides an efficient ship ballast water treating system which is mainly used for treating marine organisms in the ballast water of large ships, specifically ocean vessels to remove the effect and damage to the different ocean environments and organisms, belonging to the technical field of environmental protection. The system mainly comprises: a sea water pump, a filter and an ultraviolet sterilizer, etc, wherein the filter utilizes a rotational flow separator to separate the marine organisms, the algae, the planktont and the suspended particle in the sea water through gravity and centrifugal force. The ultraviolet sterilizer can kill the microorganisms (such as bacteria, virus etc) in the water; the discharged water can reach the D-2 discharging standard requirement of the International Ship Ballast Water and Sediment Control and Management Convention. The system has a high removing effect to the marine organisms, the bacterial and the virus in the ballast water; the system does not generate daily substances and dose not have the secondary pollution to the ocean.

Methods to control manganese deposition in an aqueous system, which include introducing a cerium-containing composition, and optionally another deposit control agent, to the aqueous system, are described. Also described, are cerium-containing compositions that promote the manganese stabilization performance of polymeric dispersants and phosphonic acids commonly used in water treatment applications. Cerium-containing compositions that can inhibit the oxidative degradation of deposit control agents are also described.

Methods and compositions are provided for corrosion inhibition treatment of aqueous systems such as cooling water systems. The methods include conjoint use of a polyvalent metal ion, such as Al or Mn and a corrosion inhibitor / deposit control agent (DCA) to the water system. The corrosion inhibitor DCA agent may be an organic compound such as a hydroxyacid, phosphonocarboxylic acid, polyhydroxysuccinic acid, or polymaleic acid or anhydride.

A Sediment control devices and systems generally includes a core made up of granular material encased within a puncture resistant fabric, a compressible layer enwrapping the core and a geotextile fabric outer casing. A plurality of such devices provide a system for controlling erosion and sedimentation.

The invention relates to a siltation reduction method for a reservoir, and belongs to a general method in the field of water conservancy. The IPC of the siltation reduction system is E02B1 / 00 and E02B9 / 02. According to the method, a submerged sediment control dam is built in the reservoir to divide the reservoir into a clear water reservoir region and a muddy water reservoir region, a sand conveying culvert is adopted to discharge water flow containing sand far away from the upstream of the dam out of the reservoir, dual purposes of water storage of the reservoir and sand discharging are achieved, and the reservoir precipitation erosion distance is widened; tiny particle silt turning over the submerged sediment control dam to the reservoir region in front of the dam is discharged out of the reservoir through dam flood discharging tunnels in a submersible sand pump reservoir dredging manner; and for wide, shallow and curved deposition forms in the watercourses of the reservoir regions, smooth and straight reservoir river channels beneficial to density flow transport are built in a submersible sand pump sand-excavating dredging manner, and the natural sand discharging effect is improved. The siltation reduction system is suitable for heavy sediment-laden river reservoir building and deposited waste reservoir reformation engineering.