The Ellis Biological Oxidation System (BOS) uses naturally occurring aerobic bacteria in a controlled reactor to remove organic materials from wastewater. The results of biological oxidation are carbon dioxide, water, and inert bio-solids. After solids removal and disinfection the effluent water is generally suitable for reuse.
The reaction chamber is typically three to four tanks operated in series using plug flow hydraulics and configured for gravity flow. Each chamber is furnished with an inlet hydraulic feed, air diffuser system, and a high surface area biological support media.
The support media is an inert structured plastic packing that features a large surface area, high void volume, and large internal openings.
The large surface area, 60 to 200 square feet per cubic feet, permit the development of high concentrations of active biomass.
The active bio-mass is typically in the range of 10,000 to 15,000 mg/l of volatile suspended solids (vss) as compared to conventional biological systems with 2,500 to 3,500 mg/l vss.
The large void volume of the support media permit free flow and uniform distribution of the incoming organics and air to the attached biomass and free discharge of the byproducts of biological oxidation.
The large internal openings within the support media allow vigorous scouring of the biomass and unimpeded discharge of the inert bio-solids.
The low solids yield, pounds of solids/pound of BOD removed, is a major advantage of the Ellis Biological Treatment System.
Solids yield of less than 0.1 pound /pound of BOD removed are typical as compared to conventional activated sludge yield of 0.5 pound /pound.
FEATURES AND BENEFITS:
• Modular construction
• Multiple stage reactors
• Shallow operating side water depth
• High surface area packing
• Easily expanded
• Development of different bacterial cultures in each stage
• Efficient low horsepower blowers
• High concentration of active biomass, volatile suspended solids (vss)