Centex Fluid Products LLC i products

Fine bubble aeration is a subsurface form of diffusion in which air is introduced in the form of very small bubbles in order to enhance the treatment process of wastewater. Air flows through a pipe into diffusers located at the bottom of a tank. These air diffusers have numerous small openings, known as pores, which enable air flow through the wastewater in the tank. The air diffusers are located on the floor of an aeration basin, fixed to horizontal air headers which are evenly spaced along the floor of the tank zones. The air headers are connected to an air distribution pipe system which receives pressurized air from the air mains, supplied by air blowers. Compressed air from the header enters through the holes in the orifice bolt situated under the diffuser disc, and then proceeds to pass through a specialized membrane. The membrane breaks up the air into microscopic bubbles and disperses it evenly over the whole volume of the aeration zone. As the bubbles rise to the surface, oxygen is transferred via diffusion into the liquor solution.

Vertical shaft, slow speed aerators are ideal for the bacterial oxidisation of effluent via the transfer of oxygen from the atmosphere. The aerators provide the necessary turbulence in order to maintain homogenisation and mixing between the live medium, the polluting elements and the water thus resulting in oxygenated sludge. Oxygen transfer rates are proportional to the power absorbed at the aerator shaft and this, in turn, is governed by the size, speed and immersion of the turbine. In addition to a fixed installment, the vertical shafts can be positioned on floating pontoons.

The Peripheral drive Settling Tanks are used for the removal of biological sludge and floating particles in both Primary and Secondary Settling tanks. This equipment is built to suit municipal and industrial waste water treatment plants

Thickeners are used to thicken sludge from settling tanks in both municipal and industrial purification plants. Increasing the concentration of the sludge through slow moving arms and vertical pickets, the sludge scrapers cover 100% of the tank floor. This also enables liberation of gas bubbles and aggregation of flakes of sludge. The system is installed inside a circular tank and is mainly composed of a central drive shaft made of steel and complete with flanges for connection to a movable trellis and to the scraper blades of the sludge drain well. Movable trellis are equipped with vertical pickets and bottom scraper blades. The central cylinder is used for the sewage intake and is anchored to the walkway.

The screenings are deposited into the compactor hopper from which a rotating shafted spiral conveys the solids to the compacting zone where they are dewatered and, at the same time, conveyed to the outlet. The compacting zone is equipped with spray nozzles for washing organic matter contained in the screenings. The liquid produced by washing and compacting is transferred back to the purification process through the screening channel.