A method of separating sludges which involves adding an insoluble mineral colloidal suspension into an industrial sludge to destabilize the industrial sludge and separating destabilized components of the industrial sludge. The insoluble mineral colloidal suspension can be adding into the industrial sludge or formed in situ therein by components into the industrial sludge that react together therein to form the insoluble mineral colloidal suspension.

A method of separating sludge which involves adding an insoluble mineral colloidal suspension into an industrial sludge to destabilize the industrial sludge and separating destabilized components of the industrial sludge. The insoluble mineral colloidal suspension includes magnesium hydroxide. In an alternative embodiment dry finely divided magnesium hydroxide can be added and then dispersed into an industrial sludge. Conventional flocculants and/or coagulants can also be added. Conventional physical separation processes can be used to separate the destabilized industrial sludge.

The present invention relates to at least one surface-reacted calcium carbonate-comprising mineral material and/or a surface-reacted precipitated calcium carbonate that is/are coated with at least one anionic polymer to obtain a surface-coated calcium carbonate-comprising material as well as to a process for the preparation of the surface-coated calcium carbonate-comprising material. Furthermore, the present invention relates to a process for the purification of water and/or dewatering of sludges and/or suspended sediments and to the use of a surface-coated calcium carbonate-comprising material for water purification and/or dewatering of sludges and/or suspended sediments.

Methods of treating bodies of water or wastewater are disclosed herein. The method can include providing one or more water treatment compositions comprising a compound with a peroxide group or a carbonate salt, a binder, a fibrous material, and an inert material, where the compound, binder, the fibrous material, and the inert material are combined into the form of an integral product, and immersing the integral product into a body of water or wastewater. The method can include a dispensing apparatus for holding such integral products such that the step of immersing the tablets into a body of water or wastewater is accomplished by immersing the dispensing apparatus into the body of water or wastewater. The dispensing apparatus can be arranged such that when integral products are placed in the apparatus the integral products form a vertical column.

Methods of treating bodies of water or wastewater are disclosed herein. The method can include providing one or more water treatment compositions comprising a compound with a peroxide group or a carbonate salt, a binder, a fibrous material, and an inert material, where the compound, binder, the fibrous material, and the inert material are combined into the form of an integral product, and immersing the integral product into a body of water or wastewater. The method can include a dispensing apparatus for holding such integral products such that the step of immersing the tablets into a body of water or wastewater is accomplished by immersing the dispensing apparatus into the body of water or wastewater. The dispensing apparatus can be arranged such that when integral products are placed in the apparatus the integral products form a vertical column.

A method of dewatering sludge is provided herein. In some embodiments, the method includes introducing micronized dry water soluble polymer (DWSP) particles into a sludge, wherein the sludge includes water and solids; separating water of the sludge from solids of the sludge using the micronized DWSP particles; and collecting a wet solid including water and solids of the sludge, wherein a concentration of solids in the wet solid is higher than a concentration of solids in the sludge, wherein the micronized DWSP particles comprise a DWSP wherein the DWSP is selected from the group consisting of a dry anionic water soluble polymer, a dry cationic water soluble polymer, a dry nonionic water soluble polymer, and mixtures thereof, and wherein a mean particle size of the micronized DWSP particles ranges from about 100 to about 300 microns.

A method of dewatering sludge is provided herein. In some embodiments, the method includes introducing micronized dry water soluble polymer (DWSP) particles into a sludge, wherein the sludge includes water and solids; separating water of the sludge from solids of the sludge using the micronized DWSP particles; and collecting a wet solid including water and solids of the sludge, wherein a concentration of solids in the wet solid is higher than a concentration of solids in the sludge, wherein the micronized DWSP particles comprise a DWSP wherein the DWSP is selected from the group consisting of a dry anionic water soluble polymer, a dry cationic water soluble polymer, a dry nonionic water soluble polymer, and mixtures thereof, and wherein a mean particle size of the micronized DWSP particles ranges from about 100 to about 300 microns.

The present application provides a method of detecting an amount of a treatment agent, such as a flocculating agent, in a process stream comprising the step of measuring at least one absorption property of a sample obtained from the process stream at a wavelength of less than about 250 nm. Processes and systems for monitoring and regulating addition of treatment agents to process streams are also provided.

Sludge dewatering process assisted by flocculating reactant, said process comprising an injection of flocculating reactant into the sludge and a step of dewatering said sludge, characterized in that it comprises a preliminary step that consists in mixing said sludge in a mixer (4) comprising a cylindrical chamber (4a) equipped with blades (4c) rotatably mounted on a shaft (4b) rotating at a speed of rotation of between 500 rpm and 4000 rpm, so as to destructure the sludge and reduce the viscosity thereof, and in discharging the sludge from said mixer (4) via a network (11) to said dewatering step, and in that it comprises a step of depressurizing said mixer (4) and said network giving rise to the lysis, by cavitation, of said sludge, said depressurizing step being carried out over a period of at least 0.1 second. Corresponding plant.

Compositions for treating bodies of water are disclosed herein. The water treatment composition can include sodium percarbonate, a binder, a fibrous material, and inert materials combined to form an integral product. The integral product can be in the form of a tablet. The binder can be vinylpyrrolidone-vinyl acetate copolymer, the fibrous material can be organic fibers, for example cotton fibers, and the inert material can be polyethylene glycol. The integral product can be between approximately 70 to 95 weight percent sodium percarbonate, between approximately 0.5 to 10.0 weight percent binder, between approximately 0.05 to 10.0 weight percent fibrous material, and between approximately 1.0 to 10.0 weight percent inert material. More specifically, the integral product can be approximately 91 weight percent sodium percarbonate, approximately 4.5 weight percent binder, approximately 1.0 weight percent fibrous material, and approximately 3.5 weight percent inert material. The integral product can be moisture free and water soluble.