WesTech’s RapiSand Plus™ combined package water treatment system is uniquely designed with a comprehensive process of ballasted flocculation followed by media filtration. This product innovatively combines clarification and filtration into a single unit, resulting in excellent water quality. Ideal for small spaces, it effectively treats high solids waters, flashy waters, and difficult-to-treat waters under challenging conditions.
The process starts with the WesTech RapiSand ballasted flocculation system. In the first section, raw water is mixed with coagulant. Two flocculation tanks follow, where coagulated water is mixed with polymer and microsand. The polymer binds the microsand grains and the flocculated particles.
Next is the clarification section where the ballasted floc settles, and the clarified water passes up through tube settlers.
In the final filtration stage, the Microfloc™ mixed media filter system captures any floc particles by running through a filter bed containing three media layers of varying size and specific gravity. The bed removes turbidity, suspended solids, color, iron, and manganese. The result is superior quality finished water.
The RapiSand Plus provides superior water treatment for small- to medium-sized plants. The system is able to handle waters of up to 1,000 NTU continuous turbidity, treated to less than 0.2 NTU turbidity to meet Drinking Water Standards.
The equipment’s high solids handling is significantly higher than typically seen in any sort of package plant or filtration system. The cost-effective water treatment system is ideal for tight spaces, remote areas, and smaller treatment system needs, with the versatility to treat water under extreme conditions and changing feeds. The filter is backwashed with the patented MULTIWASH® process that is designed to run at higher backwash rates, resulting in a vigorous backwash unmatched in the market.
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The RapiSand Plus pilot unit can be installed at a specific location alone or in conjunction with other WesTech pilot units. The pilot unit is ideal for verifying process design, for evaluating full-scale operation, or for estimating ancillary equipment requirements.