D.J. Gongol and Associates, Inc. are the exclusive manufacturer's representatives for dissolved air flotation (DAF) clarifiers and Sandfloat sand filters from Krofta Technologies in Iowa and Nebraska. Krofta's innovative combination dissolved air flotation clarifier and sand filter produces an outstanding clean water product.

The innovative Krofta sand filter design combines flocculation, flotation, and filtration in one piece of equipment. The Krofta Sandfloat sand filter is a great choice for potable water clarification, raw process water clarification, tertiary clarification, and reverse osmosis/membrane protection.

Air bubbles are just 30-70 microns in size remove flocculated solids by floating them to the surface, where they are removed from the water. The water is then filtered through any of a variety of media (sand, anthracite, greensand, or combinations thereof). Individual segments can be isolated for backwashing without stopping the filtration process, and an optional turbidity monitor is available to monitor the system at all times.

Some of the advantages to a Krofta Sandfloat sand filter:
  • Viewing windows. Seeing the process from the (in)side gives the operator a better understanding of system performance.

  • Scalability. Just like its sister Krofta product, the Supracell DAF clarifier, the Sandfloat sand filter is available in sizes from 5' to 70' in diameter, with capacities from 65 to 16,000 gpm (23 mgd).

  • First filtrate recycle capability. Extra treatment for potable water applications.

  • Continuous backwash capability.
If you have any questions about the Krofta Sandfloat sand filter, please use our contact page and we'll be happy to assist you. Also be sure to take a look at the Krofta DAF clarifier -- a better option for primary and secondary wastewater treatment.

last revised 9.30.2005