Wedeco Ag Water Technology

Itt Manufacturing Enterprises, Inc.

Xylem IP Holdings, LLC

Xylem IP Management S.a R.l.

Xylem Water Solutions Herford Gmbh

Achim Ried

Arne Wieland

Jens Scheideler

Ivan Xuetang Zhu

Dominique Lachenal

Christine Chirat

Martin Kampmann

Guillaume Pipon

Jean-Christophe Hostachy

Ivan Zhu

Method for controlling a water treatment installation having a supply, an ozonization stage, a transfer stage, a biological filter and a discharge having the following steps: measuring a first parameter set in the supply, wherein, a measurement for a first concentration of micro-contaminations and/or a nitrite concentration is determined; controlling the ozonization stage in such a manner that an ozone supply is carried out in a preselected ratio to the measured first parameter set; measuring a second parameter set in the transfer stage, wherein, a measurement for a second concentration of micro-contaminations is determined; controlling the ozonization; measuring a third parameter set in the discharge, wherein, with reference to the third parameter set, a measurement of a third concentration of micro-contaminations is determined; if the measurement for the concentration of micro-contaminations exceeds a predetermined maximum value in the discharge, increasing the ozone supply.

Regulating method for a water treatment installation using measured parameters and control of an ozonisation device

A method for treating contaminated liquids in a flow by ozone, wherein the ozone is fed in gas form into the flow at one point and then is mixed into the flow in stages by mixers following one another in the flow direction, so that an absolute quantity of introduced ozone increases after each mixer until a feed efficiency of more than 95 percent is reached.

Method for treating liquids with gaseous ozone

A method for the determination of the radical scavenging potential of a water, and includes determining the degradation of at least one reference substance in the water as a result of irradiation with UV light of at least one wavelength in the range of 100 to 350 nm, and a device for carrying out such determination with the aim of controlling a process for the oxidative treatment of water.

Method and device for determining radical attrition potential

A method for treating a prebleached chemical pulp including a step of ozone treatment of the pulp, carried out at a temperature above 60&#xb0; C., advantageously above 65&#xb0; C. and even more advantageously above or equal to 70&#xb0; C.

Method for bleaching chemical paper pulps by final ozone treatment at high temperature

The invention relates to a method for treating water, especially waste water and drinking water, containing both pathogenic germs and a substance which is difficult to decompose and is from the group comprising persistent substances, endocrine substances, odorous substances, and dyestuffs, by means of ozone supply and UV radiation. The inventive method comprises the following steps: a) ozone is supplied in a concentration of between 0.1 g/mand 15 g/m; and b) UV rays are radiated in a wavelength range of between 200 nm and 300 nm and in a dose of between 50 J/mand 2,000 J/m.

Ozone/UV combination for the decomposition of resistant substances

The invention relates to a method for treating water, especially waste water and drinking water, containing both pathogenic germs and a substance which is difficult to decompose and is from the group comprising persistent substances, endocrine substances, odorous substances, and dyestuffs, by means of ozone supply and UV radiation. The inventive method comprises the following steps: a) ozone is supplied in a concentration of between 0.1 g/m3 and 15 g/m3; and b) UV rays are radiated in a wavelength range of between 200 nm and 300 nm and in a dose of between 50 J/m2 and 2,000 J/m2.

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Bad Oeynhausen, Germany

Achim Ried