FILTER MEDIA	BED COMPOSITION	FILTRATION RATING (nominal)	SOLIDS LOADING CAPACITY
Sand (6-12 gpm/ft2)	20 x 40 mesh	~20µ	1X
Sand/Anthracite (6-12 gpm/ft2)	#1 anthracite (66%) 20 x 40 mesh sand (34%)	~15µ	1.4X
Multimedia (10-12 gpm/ft2)	#1 anthracite (66%) 20 x 40 mesh sand (30%) # 50 garnet (15%) # 16 garnet (10%)	~12µ	1.6X
Zeolite* (10-20 gpm/ft2)	14 x 40 mesh (100%)	~5µ	2.8X

FILTER MEDIA	BED COMPOSITION	FILTRATION RATING (nominal)	SOLIDS LOADING CAPACITY
Sand (2 gpm/ft2)	20 x 40 mesh	~20µ	1X
Sand/Anthracite (2 gpm/ft2)	#1 anthracite (66%) 20 x 40 mesh sand (34%)	~15µ	1.4X
Zeolite* (4 gpm/ft2  design)	14 x 40 mesh	~5µ	2.6 - 2.8X

WATER PATHS FOR QUARTZ VERSUS ZEOLITE IN FILTRATION

                           
 

BENEFITS

• BETTER FILTRATE CLARITY: Typical sand/anthracite filter beds have a 12 to 15 micron nominal filter rating. BRZ™ typically would have a nominal filer rating of less than 5 microns. This property greatly reduces the effluent turbidity, generally measured in national turbidity units (NTUs).

• INCREASED FLOW RATES IN GRAVITY SYSTEMS: In a sand/anthracite filter media system the flow rate is typically 1.2 to 2.0 gpm per square foot. In a BRZ™ filter media system, the flow rate is typically in the 4.0 gpm per square foot range.

• INCREASED FLOW RATES IN PRESSURE VESSEL SYSTEMS:  In a sand/anthracite pressure vessel filter system the flow rates are typically 6 to 7 gpm per square foot. In a BRZ™ pressure vessel filter system the flow rates are typically in the 12 to 15 (and sometimes 20) gpm per square foot range.

• LOWER CAPITAL REQUIREMENT TO INCREASE FILTRATION CAPACITY: Generally, the capacity of a filter plant can be doubled with no increase in the plant by switching the filter media to BRZ™.

• FEWER BACKWASH CYCLES: BRZ™ requires only one half of the backwash cycles that are required by sand/anthracite.

• LESS BACKWASH WATER: The fewer backwash cycles generally cut the amount of backwash water by one third to one half. This means treating less backwash water and greater plant capacity.

• GREATER LOADING DUE TO GREATER SURFACE AREA: BRZ™ generally has 6 to 7 times the surface area as sand. This makes BRZ™ a much better filter media with greater holding capacity.

• REMOVAL OF HEAVY METAL CATIONS, NITROGEN, CHLORAMINES, CERTAIN ORGANIC HYROCARGONS, AND MANY OTHER CONTAMINANTS.

• LONG FILTER BED LIFE: The anticipated filter bed life of BRZ™ is 10 years.

• LAND APPLICATION OF SPENT BRZ™ FILTER BED: Under most conditions, BRZ™ filter bed can be applied to lawns and gardens as soil amendments.

• SIMPLER HANDLING: Zeolite, monomedia, beds simplify materials handling, shipments and bed loading.

• BETTER CLEANING: Active, dynamic, bed tumbling and mixing during backwash efficiently cleans bed granules.

APPLICATIONS

• Sand/anthracite and multimedia bed replacement

• Surface and ground water filtration.

• Economical filter beds upstream to RO and Nano-membranes.
   

BEAR RIVER ZEOLITE FOR PHYSICAL FILTRATION BARRIER TO PATHOGENS SUCH AS BACTERIA AND BACTERIAL SPORES

Physical filtration barriers for accumulation or collection of microorganisms in water that endanger human health have been in focus during the last several years. BRZ™ will be an ideal collector of pathogens such as Giardia, cryptosporidium, and other bacteria and their spores. Most of these organisms and their spores are in the size range of 0.5-10 micrometers (microns). In contrast, the water permeable pores in BRZ™ are mostly smaller than .05 microns; therefore the zeolite fragment or granule can “surface collect” a high percentage of these microorganisms while the water passes through the zeolite fragment.

The U.S. drinking water standards for microorganism pathogens, and turbidity can be most easily met using a natural, relatively low-cost material, such as BRZ™ rather than ”sand” which is chiefly quartz grains.

 

 

 

Figure 1. SEM photomicrograph of a Bear River Zeolite granule (ChemSorbÒ Filter Granules) showing micromineral, projections on the surface. [Note the 10m calibration bar at the upper left]. The micro-projects effectively trap suspended solids in water.

 

 

 

 

FIGURE 2 – High magnification (SEM) of a Bear River Zeolite granule (ChemSorbÒ Filter Granule) showing detail of the mineral, micro-projections. [Note the calibration bar at the upper left].