AMG Enviro. provides a wide range of filtration solutions and technologies suitable to our clients in many fields of domestic and industrial sectors both in water and wastewater treatment 

Multi-media water filters typically utilize three layers of media for multimedia filtration: anthracite, sand and garnet. These media are often chosen for use in multimedia filters due to the distinct differences in their densities. Anthracite is the lightest filtration media per unit volume, followed by sand, and then garnet.

The Benefits of Multimedia Filtration over Conventional Sand Filters

Unlike traditional sand filters, multi-media water filters are composed of three filtration media, ordered in decreasing porosity. Because of their multi-layer design, multi-media water filters can trap and retain a far larger number of particles than traditional sand filters before back washing becomes necessary.

Trapping sediment and particulates throughout the entire depth of the filter bed, allows multi-media water filters to operate for much longer periods of time than conventional sand filters. The process of multimedia filtration produces high quality, filtered water at much faster flow rates than traditional sand filtration.

Screen filters ( mechanical filters )

A screen filter is a type of [filtration of water] using a rigid or flexible screen to separate sand and other fine particles out of water for irrigation or industrial applications. These are generally not recommended for filtering out organic matter such as algae, since these types of contaminants can be extruded into spaghetti-like strings through the filter if enough pressure drop occurs across the filter surface. Typical screen materials include stainless steel (mesh), polypropylene, nylon, and polyester.

Self-cleaning screen filters incorporate an automatic backwash cycle to overcome these limitations. Backwash cycles are far more frequent when compared to a media filter with similar capacity, and each backwash requires far less water to perform. Their ability to quickly remove contaminants from water before they leach their nutrients make such filters popular choices for recirculating aquaculture systems. They have also become popular in closed loop industrial systems such as cooling tower, heat exchange, and other equipment protection applications. Similar devices with larger openings designed only to keep out large objects are called strainers. [citation needed]

Stainless-steel strainers are used in industrial, municipal, and irrigation applications, and can be designed for extremely high flow rates. When paired with a controller and flush valve, a strainer can be fully automated. Suspended particles collect on the inside of the screen, and the flush valve opens to expel the buildup. This eliminates the need for manual cleaning of the strainer element.

Ultra filtration

Ultra filtration (UF) is a variety of membrane filtration in which forces like pressure or concentration gradients lead to a separation through a semipermeable membrane. Suspended solids and solutes of high molecular weight are retained in the so-called retentate or waste, while water and low molecular weight solutes pass through the membrane in the permeate (filtrate)

This separation process is used in industry and research forpurifying and concentrating macromolecular (103 – 106 Da) solutions, especially protein solutions.

Ultra filtration is not fundamentally different from micro-filtration. Both separate based on size exclusion or particle capture. It is fundamentally different 

from membrane gas separation, which separate based on different amounts of absorption and different rates of diffusion. Ultra filtration membranes are defined by the molecular weight cut-off (MWCO) of the membrane used. Ultra filtration is applied in cross flow or dead-end mode.

 

Other applications

  • Filtration of effluent from paper pulp mill
  • Cheese manufacture, see ultra-filtered filtered milk
  • Removal of some bacteria from milk
  • Process and wastewater treatment
  • Enzyme recovery
  • Fruit juice concentration and clarification
  • Dialysis and other blood treatments
  • Desalting and solvent-exchange of proteins (via diafiltration)
  • Laboratory grade manufacturing
  • Radiocarbon dating of bone collagen

Drum Filters

  • Micro screen drum filters are an ideal solution for filtering the water from wastewater treatment plants.
  • are automatic self-cleaning filters, with filtration degrees down to 10 micron and can be operated under atmospheric pressure without need of any external pressure source
  • In addition, the filters are used for filtering the water from paper mills and textile industry, power and heating plants, fish farms, and many other operations.
  • Automatic Back washing with means of both Pressure Difference and Timer
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