Abstract: A stator segment of a stator of a generator for a wind turbine has at least one stator laminated core which has at least two stator lamination stacks, wherein adjacent stator lamination stacks of the at least two stator lamination stacks are in each case spaced parallel to one another in an axial direction and forming in each case one stator cooling duct with a stator cooling duct width through which a cooling medium can be guided, in particular in a radial direction. A rotor segment of a rotor for a wind turbine has two or a plurality of magnet units are disposed spaced apart from one another in an axial direction, wherein the magnet units disposed adjacently in the axial direction define a circumferential gap with a gap width for feeding and distributing a cooling medium.

Abstract: The invention relates to a method for providing at least one input parameter of a sludge dewatering process of a wastewater treatment plant. The method comprises: obtaining data representing process and/or plant configuration data of said wastewater treatment plant; feeding at least part of the obtained data to at least one model formed at least by historical process and plant configuration data gathered from a plurality of wastewater treatment plants combined with properties of applied chemicals in said wastewater treatment plants; and predicting at least one input parameter and/or at least one output parameter of the sludge dewatering process by means of the at least one model for adjusting sludge dewatering process of said wastewater treatment plant. The invention relates also to a computing unit for performing at least partly the method.

Abstract: It is disclosed a method of treating municipal and/or industrial sludge, comprising the steps of: a) providing the sludge, which has a pH of at least 6; b) adding a catalyst to the sludge; c) adding a radical initiator, selected from hydrogen peroxide and percompounds to the sludge; d) adding a polymer to the sludge to provide a chemically treated sludge; e) dewatering the chemically treated sludge in at least one stage to provide a dewatered sludge cake, wherein step b) and c) may be performed in any order.

Abstract: The invention relates to a method for reducing colour of a biotechnological liquid. In the method a biotechnological liquid comprising colour forming substances is obtained and a high-basicity aluminium compound, which has a basicity of at least 0%, is added and mixed to the biotechnological liquid. Precipitate and/or flocks comprising colour forming substances are allowed to form, and the precipitate and/or flocks are separated from the biotechnological liquid.

Abstract: The invention relates to a method for reducing colour of a biotechnological liquid. In the method a biotechnological liquid comprising colour forming substances is obtained and a high-basicity aluminium compound, which has a basicity of at least 0%, is added and mixed to the biotechnological liquid. Precipitate and/or flocks comprising colour forming substances are allowed to form, and the precipitate and/or flocks are separated from the biotechnological liquid.

Abstract: A method of treating, in wastewater purification, sludge containing organic matter, divalent iron and phosphorus, in which the sludge that is treated is made to contain dissolved iron and phosphorus at a molar ratio Fe:P of above 1:1, the sludge is treated at 0–100° C. with an acid at a pH of 1–5 for dissolution of divalent iron and phosphorus from the sludge, the sludge is supplied with an oxidizer selected from hydrogen peroxide and percompounds, wherein divalent iron is oxidized by Fenton's reaction to trivalent iron, and (i) trivalent iron is precipitated as trivalent iron phosphate (ii) free radicals with a deodorization and sanitation effect are formed by Fenton's reaction, the sludge is then dewatered at a pH of at most 7, and the aqueous solution obtained in dewatering is recirculated to the wastewater purification.

Abstract: A method of treating, in wastewater purification, sludge containing organic matter, divalent iron and phosphorus, in which the sludge that is treated is made to contain dissolved iron and phosphorus at a molar ratio Fe:P of above 1:1, the sludge is treated at 0-100° C. with an acid at a pH of 1-5 for dissolution of divalent iron and phosphorus from the sludge, the sludge is supplied with an oxidiser selected from hydrogen peroxide and percompounds, wherein divalent iron is oxidised by Fenton's reaction to trivalent iron, and (i) trivalent iron is precipitated as trivalent iron phosphate (ii) free radicals with a deodorisation and sanitation effect are formed by Fenton's reaction, the sludge is then dewatered at a pH of at most 7, and the aqueous solution obtained in dewatering is recirculated to the wastewater purification.