摘要:
The present invention relates to a method for purifying raw phosphoric acid by adding ashes originating from waste incineration plants, as well as calcium hydroxide and at least one sulfide, and by wet-chemical digestion for obtaining (producing) calcium sulfate, pure phosphoric acid, metal salt solution and/or calcium hydrogen phosphates (e.g. triple superphosphate).
摘要:
The present invention relates to an improved process for treating high sulphate waters. In particular, the present invention relates to an improved process by which ettringite is used to treat high sulphate waste waters by controlled precipitation of sulphate and metal ions.
摘要:
The invention describes a method for treating sewage sludge through the treatment steps of hydrolyzing (2) the sewage sludge (1) and digesting (11) the hydrolyzed sewage sludge (10), which has undergone hydrolysis (2), for the anaerobic treatment of the sewage sludge (1), and through the step of separating phosphate from the at least partially treated sewage sludge (3). Phosphate is separated after the treatment step of hydrolyzing (2) and before the treatment step of digesting (11) the hydrolyzed sewage sludge (3), wherein the sewage sludge (10), without the phosphate portion separated in the phosphate separation step, is fed to the anaerobic treatment performed through digestion (11).
摘要:
The invention concerns a method for quantitative determination of nitrogen present in the form of one or more nitrogen containing compounds and/or ions thereof in an aqueous fluid, the method includes subjecting at least a part of the aqueous fluid to an NMR reading including generating a 14N data having a 14N NMR data spectra and correlating the 14N NMR data to calibration data. A system suitable for carrying out the method as well as a moveable manure spreader including a system is also described.
摘要:
A method for electrochemically selectively removing ions using a composite electrode is provided. The composite electrode includes a composite having a carbon support and an inorganic material immobilized on the carbon support.
摘要:
Stabilized compositions employing a sequestrant system and a binding system for improving shelf stability and dispensing stability of a solid activated bleach composition are disclosed. The compositions contain a peroxygen source and a catalyst activator which require generation of a peroxycarboxylic acid or other active oxygen sanitizing agent at a point of use. Stabilized compositions employ a sequestrant system including a phosphonic acid and/or dipicolinic acid sequestrant and a binding system comprising an anionic surfactant for a solid formulation of a catalyst activator and peroxygen source to provide shelf stability and dispensing stability for a activated bleach composition. Methods of formulating and use are further disclosed.
摘要:
In a water treatment method and an apparatus therefor, after an anionic polymer flocculant is added to water to be treated, granulation is performed by stirring, and solid-liquid separation is then performed to obtain treated water, and flocs which are not disintegrated by a shearing force during stirring and have a preferable settling property can be formed, so that the quality of treated water is also improved. Particularly, a water treatment method includes a flocculating step of adding an anionic polymer flocculant to water to be treated to form flocculated flocs, a subsequent granulating step of stirring the water to be treated to granulate the flocculated flocs, and a solid-liquid separation step of performing solid-liquid separation of generated granulated substances, wherein a cationic polymer flocculant having a cationic group rate of 10 to 50 mole % is added to the water to be treated before the anionic polymer flocculant is added.
摘要:
The invention relates to a device for water purification, especially in flowing or stagnant waterbodies. In this connection, the present embodiments propose that the device has a container in which xylitol fibers are accommodated and/or that the xylitol fibers are surrounded by a structure through which it is firstly possible for water to flow and which secondly retains the xylitol fibers within the structure.
摘要:
The present invention is to a process for reducing and removing organic phosphorus acid from waste stream. The process involves adding a multivalent metal salt to the waste stream and adjusting the pH level of the waste stream to an optimum level to maximize the removal of organic phosphorus acid.