A method of cleaning a regenerative filter having a filter housing having inlet and outlet zones, a fluid path provided between the inlet and outlet zones, and a plurality of filter elements each having an outer surface filter media applied thereto and functioning to filter particulate or contaminants from the fluid path, the method comprising draining all fluids from the filter housing, refilling the filter housing with fluid to an optimum level, and initiating a cleaning sequence of the filter housing with the fluid at the optimum level. The cleaning sequence can comprise agitating the tube sheet, initiating a pump to effectively air scour for a first predetermined amount of time, dwelling for a second predetermined amount of time, and repeating the agitating, initiating, and dwelling until a third predetermined amount of time is complete.

A method of cleaning a regenerative filter having a filter housing having inlet and outlet zones, a fluid path provided between the inlet and outlet zones, and a plurality of filter elements each having an outer surface filter media applied thereto and functioning to filter particulate or contaminants from the fluid path, the method comprising draining all fluids from the filter housing, refilling the filter housing with fluid to an optimum level, and initiating a cleaning sequence of the filter housing with the fluid at the optimum level. The cleaning sequence can comprise agitating the tube sheet, initiating a pump to effectively air scour for a first predetermined amount of time, dwelling for a second predetermined amount of time, and repeating the agitating, initiating, and dwelling until a third predetermined amount of time is complete.

Treatment methods for reduction of (1.fwdarw.3)-β-D-glucan leachables from cellulose-containing filter materials are described.

Provided a method for separating PHA and PHA prepared therefrom. The method comprises the following steps: subjecting a PHA fermentation broth to solid-liquid separation to obtain a thallus precipitate; breaking cell walls of the thallus precipitate, and subjecting obtained wall-broken products to a plate and frame filtration to obtain PHA; a filter cloth for the plate and frame filtration is pre-coated with a PHA layer. The method adopts a plate and frame separation to replace the traditional centrifugal separation to prepare PHA, and the PHA layer is pre-coated on the filter cloth for the plate and frame filtration, thereby overcome the defects in the prior art such as high cost and operational difficulty caused by adopting multiple centrifugal separations; in addition, the method of the present disclosure also exhibits the advantages of high recovery rate of PHA and high purity of the prepared PHA product.

Provided a method for separating PHA and PHA prepared therefrom. The method comprises the following steps: subjecting a PHA fermentation broth to solid-liquid separation to obtain a thallus precipitate; breaking cell walls of the thallus precipitate, and subjecting obtained wall-broken products to a plate and frame filtration to obtain PHA; a filter cloth for the plate and frame filtration is pre-coated with a PHA layer. The method adopts a plate and frame separation to replace the traditional centrifugal separation to prepare PHA, and the PHA layer is pre-coated on the filter cloth for the plate and frame filtration, thereby overcome the defects in the prior art such as high cost and operational difficulty caused by adopting multiple centrifugal separations; in addition, the method of the present disclosure also exhibits the advantages of high recovery rate of PHA and high purity of the prepared PHA product.

The present disclosure relates to a fiber discfilter, and an object of the present disclosure is to provide a fiber discfilter with a means of forming grooves on a surface of filter cloths, the fiber discfilter being configured such that foreign substances in a deep part of a filter cloth having bristles as well as foreign substances on a surface of the filter cloth may be smoothly captured during a process of filtering inflow water, and all the foreign substances captured on the surface part and in the deep part of the filter cloth may be smoothly removed during a cleaning process by a cleaning means. The present disclosure provides a fiber discfilter including a groove forming means for forming a groove in a surface of a filter cloth, the fiber discfilter including: a filter unit configured such that a plurality of filter segments each having front and rear surfaces on which filter cloths each having a surface provided with bristles are installed is installed on an outer portion of a drum so that inflow water is filtered by being introduced into the filter segments while passing through the filter cloths; a cleaning means configured to remove foreign substances captured in the filter cloths; and a groove forming means disposed to be positioned at the periphery of the filter unit and having a plurality of protrusions configured to be inserted into the surface of the filter cloth and form grooves in the surface of the filter cloth when the filter unit rotates, such that foreign substances on the surface of the filter cloth and foreign substances in a deep part of the filter cloth are uniformly captured during a process of filtering the inflow water, and the foreign substances captured in the deep part of the filter cloth are exposed during a process of cleaning the filter cloth, such that the foreign substances captured in the deep part are smoothly removed.

The present disclosure relates to a fiber discfilter, and an object of the present disclosure is to provide a fiber discfilter with a means of forming grooves on a surface of filter cloths, the fiber discfilter being configured such that foreign substances in a deep part of a filter cloth having bristles as well as foreign substances on a surface of the filter cloth may be smoothly captured during a process of filtering inflow water, and all the foreign substances captured on the surface part and in the deep part of the filter cloth may be smoothly removed during a cleaning process by a cleaning means. The present disclosure provides a fiber discfilter including a groove forming means for forming a groove in a surface of a filter cloth, the fiber discfilter including: a filter unit configured such that a plurality of filter segments each having front and rear surfaces on which filter cloths each having a surface provided with bristles are installed is installed on an outer portion of a drum so that inflow water is filtered by being introduced into the filter segments while passing through the filter cloths; a cleaning means configured to remove foreign substances captured in the filter cloths; and a groove forming means disposed to be positioned at the periphery of the filter unit and having a plurality of protrusions configured to be inserted into the surface of the filter cloth and form grooves in the surface of the filter cloth when the filter unit rotates, such that foreign substances on the surface of the filter cloth and foreign substances in a deep part of the filter cloth are uniformly captured during a process of filtering the inflow water, and the foreign substances captured in the deep part of the filter cloth are exposed during a process of cleaning the filter cloth, such that the foreign substances captured in the deep part are smoothly removed.

A method of filtering water in a system comprising a regenerative media filter is disclosed. The method includes operating the system in a filtration mode, operating the system in a cleaning mode responsive to a differential pressure measurement across the regenerative media filter, and operating the system in a pre-filtration mode after operating the system in the cleaning mode. A water filtration system is also disclosed. The water filtration system includes a regenerative media filter vessel, a pressure sensor subsystem, a filtrate line, a feed line, a recirculation line, a plurality of valves, at least one pump, and a controller. The controller is configured to direct the water through the system. A method of facilitating filtration of aquatic or recreational facilities water is also disclosed. The method includes providing a water filtration system and providing a controller.

A method of filtering water in a system comprising a regenerative media filter is disclosed. The method includes operating the system in a filtration mode, operating the system in a cleaning mode responsive to a differential pressure measurement across the regenerative media filter, and operating the system in a pre-filtration mode after operating the system in the cleaning mode. A water filtration system is also disclosed. The water filtration system includes a regenerative media filter vessel, a pressure sensor subsystem, a filtrate line, a feed line, a recirculation line, a plurality of valves, at least one pump, and a controller. The controller is configured to direct the water through the system. A method of facilitating filtration of aquatic or recreational facilities water is also disclosed. The method includes providing a water filtration system and providing a controller.

A process and device for enhancing the chemical protection capability of a collective protection filter whereby the process stream exiting the collective protection filter is passed through an Auxiliary Filter. The auxiliary filter containing an ammonia removal media, such as zirconium hydroxide impregnated with zinc chloride (ZnCl.sub.2/Zr(OH).sub.4), an oxidizing media, preferably zirconium hydroxide impregnated with potassium permanganate (KMnO.sub.4/Zr(OH).sub.4), and a methyl bromide removal media, preferably activated carbon impregnated with triethylenediamine (TEDA/carbon). The auxiliary filter and process are configured to remove toxic industrial chemicals including NH.sub.3, NO.sub.x (mixtures of NO and NO.sub.2) and CH.sub.2O, and CH.sub.3Br.