Lamella Clarifier / Settler
Our Lamella Clarifier / Settler is the space efficient settling solution for purification of water and wastewater, including re-use of process and backwash water.
No more backwashing: Our Continuously Washing Up Flow (CWUF) sand filters are deep bed gravity filters, that continuously self-clean during operation.
Continuously Washing Up Flow Sand Filters: Efficient and Self-Cleaning
The SIEBTECHNIK TEMA Continuously Washing Up Flow (CWUF) Sand Filters are deep bed gravity filters that are designed to continuously self-clean during operation. This feature eliminates the need for backwashing equipment such as pumps, tanks, piping and instrumentation, simplifying both operation and maintenance. With no need to shut down for backwash cycles, our filters provide uninterrupted service.
Our CWUF Sand Filters have a deep sand bed with an effective depth of 2 meters, providing excellent filtration and sludge holding capacity compared to conventional media filters. This depth is key to their effectiveness in various water treatment processes.
100% Australian made at our Revesby, NSW factory, these filters have a proven track record of excellence. Over the past 30 years, we have supplied more than 155 CWUF filter units of various sizes, tailored to a wide range of applications. These include the purification of raw water for drinking and processing, as well as the treatment of wastewater and industrial effluents.
CWUF Sand Filter – how it works
The CWUF filter works on the upstream principle. The water that is to be treated is admitted to the inlet distributor (1) in the bottom section of the filter. The water flows up through the sand bed, where it is cleaned and then leaves the filter through the filtrate outlet (2) at the extreme top. The pollutants remain in the sand bed. The contaminated sand is transported from the bottom cone (3) by means of the air-lift pump (4) to the sand washer (5) at the top of the filter. Cleaning of the filter sand begins in the air-lift pump, in which the intense stirring action releases the dirt particles from the grains of sand. The contaminated sand flows out of the pump outlet and drops down into the washing labyrinth (6), where it is washed by a moderate flow of cleaned water. The contaminants are entrained upwards to the washing water outlet (7). The grains of sand, which are heavier than the contaminants, drop down towards the sand bed (8) which is thus in a constant state of downward movement through the filter.
The operation of the filter – both cleaning of the water and cleaning of the sand – is continuous. As a result, the filter need never be shut down.
Benefits of the CWUF Sand Filter
Continuous Operation:
- Eliminates the need for shutdowns for backwashing, ensuring uninterrupted service.
Simplicity:
- No need for backwash water storage or backwash water pumps.
- Automated filtration process without the need for automatic valves.
- Uses single media for efficient filtration.
- Designed with no moving parts for simple and straightforward operation.
- Minimal wear and tear due to sturdy design.
Flexibility:
- Modular design allows for easy expansion to meet growing needs.
- Compact design saves valuable space.
- Versatile installation options, including free-standing units or integration into concrete tanks.
Operating Economy:
- Low pressure drop and air consumption increase overall efficiency.
- Automated and trouble-free operation.
- Low maintenance requirements, reducing maintenance costs.
- No need for spare parts, further minimizing operating costs.
Optional Extras
Every Continuously Washing Up Flow Sand Filter includes: sand media, filter lids and a local control panel. We generally offer the following optional extras:
- Platform and staircase to provide access to the top for operational and maintenance purposes
- On site installation by our service technicians
- On site commissioning assistance by one of our engineers
Material of Construction
We carefully choose the material of construction, depending on the unique site conditions and feed water characteristics, where the most common materials are:
- Epoxy coated mild steel
- 316 stainless steel
Site Requirements
Compressed air is required on site, which must be supplied to the control panel at 5-7 bar supply pressure. Air flow required depends on the filter size and can be advised after model selection.
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Gravity Drainage Deck
Gravity Drainage Decks are used to thicken sludges with low suspended solids of 0.3 - 1.5 %. Free drainage of liquid by gravity through porous belt, aided by plough turning action.
Belt Filter Press
Our SIEBTECHNIK TEMA Belt Filter Press (BFP) is designed to provide a versatile and cost-effective solution for dewatering a wide range of sludges.
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