Abstract:
The invention relates to an enveloping membrane for discharging an enclosed agent in an aqueous medium. The aqueous solution of an oxidizing chlorine-oxygen compound is enclosed is said enveloping membrane which is insoluble in a neutral aqueous medium. In an advantageous embodiment, the enveloping membrane represents a capsule structure, particularly according to the core/shell principle. The core has a spongy, moist structure and contains the aqueous solution of an oxidizing chlorine-oxygen compound while the shell is water-insoluble and is provided with pores to discharge the chlorine-oxygen compound over an extended period of time, particularly in an aqueous medium. The enveloping membrane is suitable foremost for disinfecting and purifying/cleaning liquids and substrate surfaces, especially in the form of fabrics, filter materials, membranes, gaps, joints, and/or filling elements, for disinfecting water, particularly drinking water and bath water, and filter materials, where the inventive enveloping membrane discharges the agent into the medium or onto the substrate that is to be treated for an extended period of time, especially in a continuous and metered form.
Abstract:
Disclosed is an alkali aqueous flocculating agent based on an alkali aqueous salt clay extract containing dissolved silicate and aluminate, in addition to alkali chloride whereby for an aluminate (1) content by weight expressed as Al(OH)3, 1.) approximately 2 to 3 parts by weight of silicate expressed as SiO2 are provided and 2) at least approximately (10) parts by weight, especially at least (20) parts by weight of alkali chloride are provided, in addition to a flocculating and a sedimentation agent in the form of an acidic and alkali-extracted salt clay. The invention further relates to a method for the production of said flocculating and sedimentation agents which can be used advantageously in swimming baths, for the treatment of drinking water, industrial water, grey water and waste water in sewage treatment plants as auxiliary agents for absorption, sedimentation and filtration. Said agents can also be used to reduce the amount of harmful substances and to embellish water in swimming pools, ponds and biotopes. The respective flocculating agent is more particularly used by means of dosing systems. One particular advantage of the invention is that the agent is obtained from a natural product and can be used in swimming pools and water biotopes without any harmful side effects.
Abstract:
The present disclosure provides a method for flushing particle bearing filter beds located in a circuit or linear water treatment plant for sterilization and decontamination of the filter beds. The filter can be charged with a chlorine-oxide-containing, chlorine-dioxide-containing, halogen-containing, and/or peroxide-containing aqueous solution. A solution acts on the deposits of the particle-type filter bed such that the bed can be subsequently flushed with water and/or an aqueous medium for removal of the process caused reaction product and any residual chlorine oxides or halogens or peroxides.
Abstract:
Disclosed is an alkali aqueous flocculating agent based on an alkali aqueous salt clay extract containing dissolved silicate and aluminate, in addition to alkali chloride whereby for an aluminate (1) content by weight expressed as Al(OH)3, 1.) approximately 2 to 3 parts by weight of silicate expressed as SiO2 are provided and 2) at least approximately (10) parts by weight, especially at least (20) parts by weight of alkali chloride are provided, in addition to a flocculating and a sedimentation agent in the form of an acidic and alkali-extracted salt clay. The invention further relates to a method for the production of said flocculating and sedimentation agents which can be used advantageously in swimming baths, for the treatment of drinking water, industrial water, grey water and waste water in sewage treatment plants as auxiliary agents for absorption, sedimentation and filtration. Said agents can also be used to reduce the amount of harmful substances and to embellish water in swimming pools, ponds and biotopes. The respective flocculating agent is more particularly used by means of dosing systems. One particular advantage of the invention is that the agent is obtained from a natural product and can be used in swimming pools and water biotopes without any harmful side effects.
Abstract:
The invention relates to a method for producing an essentially chlorite-free, stable, aqueous chlorine-oxygen solution. Said method comprises the following steps: (1) a hydrogen sulfate compound is dissolved in water, (2) an acid is added to the aqueous solution containing hydrogen sulfate in such a quantity that the pH value in the target final product in the form of the essentially chlorite-free, stable, aqueous chlorine-oxygen solution is maintained between approximately 3 and 5; (3) a peroxide compound is added; and (4) an aqueous chlorite solution is added dropwise in a quantity of between approximately 60 and 90 mole %, especially between 70 and 80 mole %, of chlorite, in relation to the concentration of peroxide compound. The invention also relates to the chlorine-oxygen solutions which can be obtained by means of said method.
Abstract:
The invention relates to a filtering apparatus including, inside a filtering tower (1), a filtering section (r), a liquid collecting section (7) and a liquid feeding section (e). The liquid feeding section (e) includes a diffuser (A) attached to an upwardly oriented orifice (5a) formed at a leading end of a liquid feeding pipe (5). The object is to provide an apparatus which allows use of the existing filtering tower without its enlargement and which allows uniform falling of the filtering liquid over the substantially entire top surface of the filter medium layer, thus making it readily possible to maintain the flatness of the top surface of the filter medium layer even when light-weight medium is employed, thereby to allow the filter medium layer as well as the entire filtering apparatus to achieve their desired filtering performance. The diffuser (A) includes a damping portion (k) for damping the momentum of the liquid discharged from the orifice (5a), a first discharging portion (8) for upwardly discharging the liquid damped by the damping portion (k), a second discharging portion (9) for laterally discharging the liquid damped by the damping portion (k), and a third discharging portion (10) for downwardly discharging the liquid damped by the damping portion (k), said first, second and third discharging portions being stacked one on another from the top to the bottom in the mentioned order.