• ITOSB 4. Cadde No:1, Tuzla, Istanbul, TURKEY

Multi Media Water Filters (Sand Filters / Actived Carbon Filters)

3A Makina is the leading manufacturer of sand filters, most popular type of multimedia filters, in Turkey.

Sand filters are used as multimedia filters to remove suspended solids from water and wastewater. Because they have one layer of filter media, sand filters remove only relatively large solids (usually in the range of 40 micron and larger). The effective size of each granule of sand typically varies from 0.35mm – 1.2mm. Larger granules yield coarser filtration. Finer granules yield finer filtration.

Removing suspended solids smaller than 40 microns requires filters with either two or three layers of filter media. These are referred to as dualmedia filters or multimedia filters. When sized properly and with the correct configuration of filter media, these multimedia filters can remove suspended solids as small as 5 micron.

The smaller the solid to be removed, the slower the water must pass through the media and the finer the granule of media must be. Very often the end user doesn’t know how small a solid must be removed. In those situations, how the filtered water will be used will determine how small a solid should be removed.

The higher the concentration of suspended solids, the larger the diameter of the multimedia filter needs to be. All filters have a maximum concentration of suspended solids that can be managed without compromising filter performance.

Backwash water is used to clean the multimedia filters and flush out the suspended solids that have been trapped in the media bed. Water for backwashing can come either from the filters themselves or from an external source of clean water (such as a storage tank).

If backwash water comes from the sand filtration system, there must be more than one sand filter in the system. Sand filters are backwashed one-at-a-time. During the backwash cycle, a portion of filtered water exiting the other multimedia filter(s) in the system is used to clean the dirty multimedia filter. During these periods (which typically last for several minutes per filter), the amount of filtered effluent flowing downstream of the filter is reduced by the amount of water required for backwashing.

In cases where this temporary reduction in flow is acceptable, there will be two or more filters in the system.

Clarifiers / Thickeners


Clarifiers are designed to receive raw or waste water from the incoming water flow which has been screened to remove larger solids and grits with the help of the scrapers.The velocity of the water is reduced in the system ensuring that the incoming water is distributed hom in a radial manner to all directions.

This application provides maximum setting time causing efficient separation of settled particles from the water.The collected particles travel down the trough the slope forming sludge. The sludge is scraped off by a scraper bridge which is included in the system. Finally the clear water overflows via a launder located at the top portion after leaving the scraper system.


Clariflocculator is the combination of clarification and flocculation in a single tank including two concentric tanks where the outer tank serves as a clarifier and the inner tank serves as a flocculation basin.

The water enters the flocculator, where the flocculating paddles enhance flocculation of the feed solids. As heavy particles settle to the bottom, the liquid flows radially upward in the clarifier zone. The clarified liquid is discharged over a peripheral weir in to the peripheral launder. The remaining sludge is raked  with a scraper to the bottom near the central weir from where it is routed to the sludge chamber and discharged.

Travelling Scraper / Thickener

Travelling bridge scraper is designed according to span as Full Wall, Half-Wall, Steel Profile or to avoid high wind loads as Truss Beam. Carriages, which are located at both ends of the bridge, can travel on rails with or without pinion rock or on polyurethane tyred wheels with guide wheels. The drive unit can be mounted either at the end carriages or at the middle of the bridge. Bridge movement controlled by limit switches.

For removal of settled sludge, both scraping and suction methods by pumps can be used. The solids settling in the tank are scraped  by scraper or pumped to solids hopper. Also for removal of floating matter; skimming or pumping types are available. Power feed can be done by using cable carrying roller or by means of motorized or spring loaded cable drums.

Other Equipment

Filter presses are based on an ancient principle, used for pressing oil and wine.

Today’s technology brings the filter press back to the present as a current, invaluable tool. Simplicity, flexibility and effectiveness make it essential for many industries. The filter press dehydrates the sludge by squeezing all water out of it,recovering approx 90% of this water,  into dry panels of pressed sludge, which can be easily moved and are ready to be reused or disposed of.

Filter press is an ideal solution for washplants used in industries like mining.

Grit removal involves the removal of sand, gravel or other heavy solid materials, usually those that have higher specific gravity than the organic biodegradable solids in the wastewater. Grit removal units are installed between medium and fine screens to capture these abrasive material.

3A Makina designs and manufactures a wide range of mixers used in water and wastewater treatment.

With an experience over 30 years our mixers are solutions for any treatment facility requires from flocculation, anoxic and anaerobic mixing to anion exchange processes.

The package treatment plants are used to denote relatively small-scale treatment plants, that are not constructed as permanent structures, but rather mobile units.  Usually a package plant is pre-assembled and transported to site or assembled on site on a structure such as a container.  Package plants can be made up of conventional, as well as advanced treatment processes.

Polyelectrolytes used in water treatment systems have certain storage, handling, feeding, and dilution requirements.

Our own designed and full automated polymer feeding systems prevent underfeeding or overfeeding to keep the treatment process stable.

The removal of coarse solids such as plastic bottles or aluminium cans and fine solids such as paper or small plastic particles is the first step in any waste water treatment application.

Our screens used in pre-treatment protect downstream components like pumps, valves and enables the treatment plant to work properly. Therefore the mechanical screens are very important for any waste water treatment facility.

Surface aeration is a powerful pumping action of the surface aerator transfers oxygen by breaking up the wastewater into a spray of particles, creating more surface area for atmospheric pressure to drive oxygen into the wastewater. At the same time, the oxygen-enriched water is dispersed and mixed, resulting in highly effective aeration for wastewater treatment.

3A Makina’s surface aerators are globally used in different projects.

Water flow control devices are designed to serve to a various tasks.

There is a wide scope of equipment manufactured by 3A Makina from simple direct operation by handwheel to complex control systems by electrical actuation.

The range of water flow control devices with associated operating equipment will outfit the most demanding specifications and applications.

Penstocks and telescopic valves are our regular fabricated equipment used in the water flow control process.