Matches 1 - 14 out of 14


Match Document Document Title
US20140190908 CONTINUOUS CIRCULATION SAND FILTER AND CONTINUOUS CIRCULATION SAND FILTERING METHOD  
Provided is a continuous circulation sand filter including a filtering barrel filled with a sand filtering layer, an inflow tube for introducing raw water into the filtering barrel, a treated...
US20080006589 Process for In-Situ Cleaning of Drinking Water Filtration Media  
The present invention provides a process to clean water filtration media in a filtration bed. The process includes applying a granular cleaner to the water filtration media and applying an...
US20140263075 COMPOSITIONS AND METHODS FOR CLEANING WATER FILTRATION MEDIA  
Compositions and methods for removing surface deposits in situ from filtration media contained in water filtration beds may include a solid acid component, a solid oxidizer, low temperature...
US20140166593 Gas-Liquid Distribution Technique for Water or Wastewater Filters Using Underdrains  
A method of distributing gas and liquid through an underdrain system includes: a) positioning an underdrain system on a filter floor, the underdrain system comprising at least one underdrain block...
US20090071914 Underdrain for a filter system for filtering water or wastewater and a method of washing the filter system  
An apparatus for filtering water and/or wastewater including at least one underdrain lateral. The underdrain lateral is configured to receive a liquid during a filtration cycle and directs a...
US20150008195 METHOD FOR WASHING A FILTER HAVING AT LEAST TWO LAYERS OF FILTERING MEDIA, IN PARTICULAR FOR FILTERING SEAWATER, AND EQUIPMENT FOR IMPLEMENTING SAID METHOD  
The invention relates to a method for washing a filter (F) having at least two layers of filtering media (4, 5) for raw water containing components having a tendency to form cakes (M), in...
US20110174746 Water Treatment Methods  
The present invention relates generally to a system and method for treating wastewater in a filter media apparatus having a draft tube system. The filter media may be walnut shell media.
US20100213143 Apparatus for Inhibiting Fines Carryover  
Apparatus for inhibiting fines carryover in the form of a settlement tank comprising: a filter which divides the tank into upper and lower portions; a fluid inlet in the lower portion for...
US20110163049 Water Treatment Apparatus and System  
The present invention relates generally to a system and method for treating wastewater in a filter media apparatus having a draft tube system. The filter media may be walnut shell media.
US20120103917 Water Treatment Apparatus and a Method for Cleaning a Filter Layer of a Water Treatment Apparatus  
A water treatment apparatus including one or a plurality of mixed raw water stream jet nozzles (7), a filtering tank (5) housing a filter layer (4) disposed below the mixed raw water stream jet...
US20140190907 UPPER-LAYER CLEANING DEVICE FOR WATER TREATMENT DEVICE, AND METHOD FOR CLEANING WATER TREATMENT DEVICE FILTER LAYER  
Water treatment apparatus includes raw water special air mixing nozzles (7); filtering tank (5) housing filter layer (4) including two layers of upper layer (2) and lower layer (3), the upper...
US20110290734 SCREENLESS GRANULAR MEDIA FILTERS AND METHODS OF USE  
A liquid filtering apparatus is placed in a vessel having a bed of filtration material, the bed comprising at least two different sizes of filter media wherein the filtration material is...
US20160256800 Multiple Rate Filter Underdrain Lateral Gas Metering Plate  
A filtration system has at least one underdrain lateral, a flume, and at least one metering plate. The metering plate includes a plate member with at least one opening configured to receive liquid...
US20150343336 SANITIZATION AND REGENERATION OF POROUS FILTER MEDIA WITH OZONE IN BACKWASH  
The invention provides methods and systems for sanitizing and/or regenerating porous filter media using dissolved ozone in the filter backwash under fluidized conditions.

Matches 1 - 14 out of 14