Abstract: Systems and methods for polymer addition control for sludges from water and wastewater treatment. In a treatment process where flocculating agents are used to promote solids aggregation, intrinsic physical properties of the liquid rich stream following separation may be continuously measured in order to control or optimize the amount of flocculating or treatment agent that is added to the process. These intrinsic physical properties may include, for example, the flocculating suspension or network strength. By determining the floc strength using various treating agent dosages, a optimum treating agent dose can be determined. The optimum treating agent dosage is the minimum in a floc strength to polymer dose curve.

Abstract: Systems and methods for polymer addition control for sludges from water and wastewater treatment. In a treatment process where flocculating agents are used to promote solids aggregation, intrinsic physical properties of the liquid rich stream following separation may be continuously measured in order to control or optimize the amount of flocculating or treatment agent that is added to the process. These intrinsic physical properties may include, for example, the flocculating suspension or network strength. By determining the floc strength using various treating agent dosages, a optimum treating agent dose can be determined. The optimum treating agent dosage is the minimum in a floe strength to polymer dose curve.

Abstract: Systems and methods for polymer addition control for sludges from water and wastewater treatment. In a treatment process where flocculating agents are used to promote solids aggregation, intrinsic physical properties of the liquid rich stream following separation may be continuously measured in order to control or optimize the amount of flocculating or treatment agent that is added to the process. These intrinsic physical properties may include, for example, the flocculating suspension or network strength. By determining the floc strength using various treating agent dosages, a optimum treating agent dose can be determined. The optimum treating agent dosage is the minimum in a floc strength to polymer dose curve.

Abstract: An apparatus for uniformly mixing two or more liquids. The apparatus includes a water inlet having a flow orifice for controlling flow rate and pattern. A second fluid to be mixed with the water is injected downstream of the water orifice an opposite direction resulting in a high energy contact to insure uniform wetting/mixing of the fluids. The mixture is directed through a chamber having a spacial aspect to insure uniform mixture before placement into a secondary chamber having multiple distribution points to assist in diluting the mixture into an additional fluid before directing the fluid to its point of use.

Abstract: A method is disclosed for the treatment of water, containing an oxidizing agent, flowing through a conduit or contained in a vessel. The oxidation reduction potential or the ORP of the water is continuously measured at a sensing position and a reducing agent is fed to the water in response to the measured ORP to neutralize the oxidizing agent and maintain a desired concentration of reducing agent residuals in the water at the second sensing position.

Abstract: Polymer activation apparatus for activating a batch of dry polymer in dilution water includes a tank which contains the dilution water in a mixing vessel and a mixing assembly within the mixing vessel. The dilution water is circulated at a high rate through the mixing assembly to create a high shear flow condition within the mixing assembly. The polymer is introduced into the mixing assembly to disperse the polymer in the dilution water and form a slurry in the vessel without causing agglomeration of the dry polymer. After dispersion and before hydration of the polymer, the rate of circulation through the mixing assembly is reduced to create a low shear flow condition. The low shear condition is maintained as the viscosity of the solution increases.

Abstract: Polymer activation apparatus for activating a liquid polymer emulsion in dilution water includes a first processing zone in which the polymer solution is subjected to a high mean shear rate for a predetermined period of time, and a second processing zone in which the polymer solution is subjected to a low mean shear rate for a longer period of time. The shear rates and residence times in the zones are selected to produce maximum activation in less total processing and aging time than that required in known apparatus.

Abstract: A polymer activation apparatus for activating and diluting a liquid polymer with water includes, a vessel defining a cylindrical chamber divided into first and second processing zones, the polymer and water being supplied to the first processing zone, an impeller located in the first processing zone subjecting the polymer to a high shear rate for a short contact time to initiate dissolution and activation of the polymer, and the polymer being moved to the second processing zone under the force of the water supplied to the first processing zone, a second impeller in the second processing zone subjecting the polymer to a lower shear rate for a longer period to continue the polymer dissolution and activation process.

Abstract: A polymer activation apparatus for activating and diluting a liquid polymer with water includes, a vessel defining a cylindrical chamber divided into first and second processing zones, the polymer and water being supplied to the first processing zone, an impeller located in the first processing zone subjecting the polymer to a high shear rate for a short contact time to initiate dissolution and activation of the polymer, and the polymer being moved to the second processing zone under the force of the water supplied to the first processing zone, a second impeller in the second processing zone subjecting the polymer to a lower shear rate for a longer period to continue the polymer dissolution and activation process.

Abstract: Polymer activation apparatus for activating a liquid polymer emulsion in dilution water includes a first processing zone in which the polymer solution is subjected to a high mean shear rate for a predetermined period of time, and a second processing zone in which the polymer solution is subjected to a low mean shear rate for a longer period of time. The shear rates and residence times in the zones are selected to produce maximum activation in less total processing and aging time than that required in known apparatus.

Abstract: The visual monitoring apparatus includes a transparent tube section with coupling flanges at each end for coupling to adjacent conduit sections carrying a stream of conditioned sludge which includes agglomerated solid bodies. Control rods extend between the coupling flanges to strengthen the tube. A strobe light is mounted in a housing which is mountable alongside the tube and closely conforms to the shape thereof for confining the strobe light to a predetermined area of the tube and isolating that area from ambient light. The housing accommodates the control rods therethrough and contains a mirror which directs light reflected from the illuminated contents of the tube along a viewing path through a view port in the housing which is closed by a door or hatch. The frequency of the strobe can be adjusted to correspond to the flow rate of the fluid in the tube for creating the visual impression of substantially stopping the movement of the solid bodies in the tube.

Abstract: A polymer activation apparatus for activating and diluting a liquid polymer with water includes, a vessel defining a cylindrical chamber divided into first and second processing zones, the polymer and water being supplied to the first processing zone, an impeller located in the first processing zone subjecting the polymer to a high shear rate for a short contact time to initiate dissolution and activation of the polymer, and the polymer being moved to the second processing zone under the force of the water supplied to the first processing zone, a second impeller in the second processing zone subjecting the polymer to a lower shear rate for a longer period to continue the polymer dissolution and activation process.

Abstract: The apparatus includes a frame in which a vessel is mounted. Water is delivered into the vessel through one inlet, polymer is delivered into the vessel through a second inlet, and a further liquid is delivered into the vessel through a further inlet. A pulsating pump delivers the polymer to the vessel and a continuously operated pump delivers the further liquid into the vessel. Either pump can be energized separately or both pumps can be energized depending upon the situation. For example, the polymer pump is energized when it is desired to deliver an emulsion polymer to the vessel and the other pump is energized when one wants to deliver a solution polymer.

Abstract: Polymer activation apparatus includes an impeller in a mixing chamber having inlets for polymer and dilution water, and an outlet for removing the resulting solution. The impeller includes a circular disk having a plurality of internal channels which extend from an eye at the axis of the impeller to the impeller edge. The eye extends through the top surface of the impeller, and a shaft is secured to the bottom surface of the impeller to rotate it.A polymer inlet and a water inlet are provided within about 1 inch of the impeller eye, and are oriented so that the polymer and water are placed directly into the eye of the impeller, within about 11 milliseconds of the initial mixing of the polymer and water.

Abstract: Portable mixing apparatus is disclosed which is specially adapted for use in containers such as standard 55 gallon drums and the like which have an opening or "bung" near an edge of the container. A mounting plate is provided which has a threaded end secured in the bung, and a flange secured at a selected angle to the threaded end. A collapsible propeller and mixing shaft pass into the container through the threaded end and a motor operatively connected to the mixing shaft is secured to the mounting plate around the container opening by spaced bolts which pass through and lock into keyhole slots in the mounting plate. The motor, mixing shaft and propeller are secured at an angle so that the propeller is in a selected quadrant near the axis, and preferably also the bottom, of the container. The apparatus can easily be installed and removed without twisting or tangling the power cord.

Abstract: The apparatus includes a frame in which a vessel is mounted. Water is delivered into the vessel through one inlet, polymer is delivered into the vessel through a second inlet, and a further liquid is delivered into the vessel through a further inlet. A pulsating pump delivers the polymer to the vessel and a continuously operated pump delivers the further liquid into the vessel. Either pump can be energized separately or both pumps can be energized depending upon the situation. For example, the polymer pump is energized when it is desired to deliver an emulsion polymer to the vessel and the other pump is energized when one wants to deliver a solution polymer.

Abstract: The mixing apparatus includes a centrifugal pump having a casing and an impeller located therein. The casing has a axially extending tubular inlet located centrally on its end wall, the discharge being a tubular projection on the side wall's casing. A second casing substantially identical to the casing of the pump, has a tubular projection on one of its end walls coupled to the inlet of the first mentioned casing. Water is delivered to a tubular projection on the side wall of the second casing. Particulate polymer is delivered to the other end wall of the second casing. The swirling water in the second casing creates a lower pressure at its discharge to draw the polymer downwardly and into the first casing where it is vigorously mixed with the water.

Abstract: Dry polymer is fed from a hopper into the funnel-shaped path of a mixing structure which has upper and lower nozzle portions cooperating to define a frustoconical nozzle opening or eductor which provides communication between the path and a surrounding annular chamber. Water is delivered along the side of the chamber so that it swirls through the nozzle opening and is ejected into the funnel-shaped path in a conical swirling stream which mixes with dry powder falling along the path and forms a Venturi to draw the powder along the path. The swirling mixture is injected into the top of a vertical rotating tube which extends down into a container and carries an elongated hollow impeller at its lower end. The water polymer mixture is further mixed in the tube and sprayed through the impeller into an upper mixing compartment of the container. Liquid is drawn through openings in the bottom of the impeller to facilitate the mixing action.

Abstract: A polymer feed system comprises at least one mixing and activating apparatus having a water inlet, a polymer inlet and an outlet and constructed and arranged to dilute and fully activate a polymer. The polymer feed system further comprises a conduit for carrying water to the water inlet of the mixing and activating apparatus. A conduit is coupled between the outlet of the mixing and activating apparatus and the first conduit. Activated polymer merges with the remainder of the water and is mixed in a static mixer.