Futuristic wastewater technology arrives in SA
THE GEM SYSTEM combines centrifugal separation with the highest output of nanobubbles for the effective removal of contaminants from many different types of wastewater so that it can be reused.
The GEM system has significant benefits over traditional primary treatment systems like dissolved air flotation (DAF) systems or clarifiers common in South Africa.
HOW IT WORKS
The major difference between the GEM system and conventional flotation technology is the method of forming bubbles and attracting particles to the chemicals. By subjecting 100% of the waste stream to entrained air and appropriate chemistry, in the patented hydrocyclones, the GEM system is able to attract the highest level of contaminants resulting in extremely clean effluent within a very small footprint.
The size of the GEM system is not impacted by increased contaminant loading. This means that clients can treat concentrations of 1000 mg/l total suspended solids (TSS) or 15 000 mg/TSS in the same system. This also allows a retrofit of existing flotation systems (DAF's or others) to increase capacity in terms of flow rate, increase contaminant loading, getting better results or saving on chemicals and operational costs without increasing footprint or investing in an expensive new system. The development of the GEM technology has required that a paradigm shift takes place regarding both the chemistries used for the solid-liquid separation as well as the application of those chemistries. The chemicals used in the GEM system have been supplied by Buckman, a privately held, chemical company with headquarters in Memphis, Tennessee and a South African base in KZN. Buckman are working exclusively with QFS to ensure optimal performance of the GEM technology through the application for customised chemistries.
The GEM system has been used all over the world in all kinds of applications, from food processing, paper mills and steel mills. It performs well on all kinds of effluents, however the more contaminated the waste stream or the higher the loading of solids, fats, oils and grease, the more its benefits show.
The core GEM technology is a series of hydrocyclones in which the mixing speed and mixing energy are controlled to provide the highest level of contaminant removal. By the time the solids and liquids leave the hydrocyclones and enter the tank, they are already separated. This allows the mixing of air and/or chemicals at any given time and makes it easier to accommodate variable flow rates or a variable contaminant loading. This feature allows the GEM system to be applied to a variety of treatment plant sizes and industries.
The pilot plant of the GEM System unveiled at the launch in Stellenbosch is available for demonstrations and trials nationwide.
From an Article that appeared in Water & Sanitation Africa, January/February 2015, written by Blake Wilkins with Rob Holmes.
Quality Filters Launches new GEM floatation technology
Members of industry gather around the GEM demonstration unit for a description of the process, and some discussion on the unique method of introducing air and chemicals into the waste water stream. The pilot unit is mounted on a trailer for mobility and easy set up at customer sites.
Treated water from the GEM process is discharged into the same sump as the treated water from the client's existing DAF system. The difference in quality can clearly be seen between the two streams after receiving the same raw poultry processing waste water.
Samples of raw waste water (far left), GEM treated water for discharge (middle) and GEM sludge were taken and sent to the laboratory for analysis. The clarity of the GEM treated water showed a significant improvement over the current system. As the air is mechanically trapped in the GEM sludge, it will remain buoyant and continue to dewater and thicken after treatment. This means the client benefits from improved effluent quality and reduced cost of sludge handling and disposal.
SOUTH AFRICA PRODUCT LAUNCH!
GEM pilot facility, treating 5000 liters of waste water per hour. Solids screening down to 0.5mm, followed by GEM for removal of FOG (fats, oils and greases). The patented GEM (gas-energy-mixing) technology is the next generation in advanced floatation technology.
Waste water treatment in the metal processing industry
Duraflow micro filtration membranes for waste water treatment in metal processing industry. Heavy metal removal by means of mechanical filtration of 0.1 micron. Replacement of settling and clarification in conventional treatment. Duraflow skid for the treatment of 50 000 liters per hour.