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The demands on the quality and efficiency of sewage treatment plants are growing from year to year, not least due to rising energy and disposal costs. As a result, using decanters to dewater sludge means using state-of-the-art technology. The C-series decanters from Flottweg achieve high performance with reduced energy consumption.
Flottweg Wastewater Decanters offer advantages over other processes and competitors' machines:
► High dry solids values in the discharged material
► Higher power density within a small footprint
► Powerful Flottweg Simp Drive® drive
► Reduction of operating costs due to reduced need for flocculant
► Additional energy recovery with the Flottweg Recuvane® system
► Economical bowl and scroll drive
► duces the energy consumption of your decanter by 10 to 30 percent
The New C2E Decanter Centrifuges for Small Treatment Plants
Flottweg presents a new era of sludge dewatering for small sewage treatment plants. The C2E decanter centrifuge was developed specifically for the dewatering and thickening of smaller sludge loading rates. It features all of Flottweg's know-how in a compact, space-saving design.
Over five decades, Flottweg has gathered rich knowledge of the area of sewage sludge thickening and dewatering. That know-how has been transferred into a new generation of environmental centrifuges. Our requirements for the C2E are just as high as for the big Flottweg Decanters.
Disposal costs still play a central role, even for small communities. The quality of the machine and its efficiency regarding separation results reduces the overall lifetime costs to a minimum.
Want to learn more about our solutions? Then get in touch.
Flottweg C series decanters around the world process 25 million liters of sewage sludge per hour. The dewatering and thickening of sewage sludge plays a decisive role in the wastewater treatment process.
Requirements for the quality and efficiency of sewage treatment plants increase year after year, not least driven by the increasing costs of energy and disposal. As a result, the state of the art is now to use decanter centrifuges to dewater and/or thicken the incoming sludge. Flottweg developed the decanters of the C series especially for this purpose.
The C7E represents the largest of all the C machines. The C7E increases the proportion of dry substance in the sludge, thereby reducing its volume and weight (due to loss of water). That means that operators need to dispose of, recycle, or burn less sludge. The result: enormous potential savings for the operators of sewage treatment plants.
Flottweg Sedicanter separates solids from liquids. Its special feature: the solids consist of a sediment with properties ranging between soft and fluid.
Typical applications of the Sedicanter are "soft products":
► Biomass, yeast and protein suspensions.
► Fermentation broths and UF retentate
► CIP cleaning liquids and coarse matter-free live sludge
► Fruit juice byproducts and plant-derived raw materials
► Soap separation from oil refining processes
The special technical features of the Flottweg Sedicanter:
► Separation of extremely difficult-to-sediment solids by acceleration up to 10,000 gee.
► Hygienic design, thus usable for applications in biotechnology
► Flexibility with fluctuating composition of the feed product by the adjustable impeller
► Gas-tight operation is possible by sealing the separation space off from the ambient air using inert gas
In the process of treating waste water, fine biological sludge is constantly produced during the decomposition process at a sewage treatment plant. For a stable decomposition process in the biological treatment phase, the sludge produced in the secondary sedimentation pond, also known as excess sludge, is removed and fed into the digestion tower. Flottweg's OSE decanters thicken the sludge before it enters the digestion tower. Sewage treatment plants benefit from an even feeding of the digestion tower and can thus optimally use the volume of the digestion tower. The Flottweg OSE decanter is specially designed for sludge thickening.
► Highest gas yield through constant feeding of the digestion tower
► Best possible thickening even with changing feed conditions
► Larger sedimentation volume (due to deep pond and steep cone) enables highest power density (10 - 20 percent) with minimum space requirement
Sewage sludge dewatering offers enormous potential savings for operators of sewage treatment plants. Dewatering sludge means reducing the quantity of sludge for disposal. Depending on system capacity, 1 percent more dry substance can lead to cost savings in the five- to six-digit range.
The dewatering performance of the Flottweg Xelletor Series is significantly better than even its predecessors. It sets new benchmarks for throughflow, dry substance, and polymer and energy consumption.
The Xtra in performance at low consumption
in comparison with our high-performance C Series:
►Xtra dewatering performance: Up to 10 percent less sludge volume due to higher total dry solids in dewatered sludge
►Xtra polymer savings: Up to 20 percent savings on flocculant consumption
►Xtra capacity: Up to 15 percent more throughflow
►Xtra energy savings: Up to an additional 20 percent energy savings
In many aspects of process engineering, separators are used for mechanical separation and clarification of mixtures comprising solids and liquids. A separator is liquid-oriented and works with a higher rotation speed than a decanter. As a result, the generated centrifugal acceleration (g number) of a separator is significantly more powerful than in decanter centrifuges. Flottweg separators are suitable for separating ultrafine solid particles from a liquid (clarifier separator). Furthermore, Flottweg separators are suitable for separating mixtures of liquids with different densities at the same time as separating a solid (purifier). Flottweg AC separators (Automatic Cleaning) can be used in a wide range of applications, and are also available in various configurations.
— Beverage and brewing industry
— Starch industry
— Chemicals and biotechnology
— Extracting and processing fats and oils
The Flottweg Belt Press is in use in many mechanical separation technology areas, especially in the production of fruit juice, concentrate and vegetable juice.
But other products, too, such as algae extracts, coffee grounds, herbal extracts, soy, and starch, are produced using belt presses.
Flottweg Belt Presses:
►Maximum quality: You obtain not just the best possible quality, also maximum yield at lower costs.
►Minimum operating difficulty: Its clear design makes it easily accessible for cleaning, operation and maintenance. Automatic belt control provides optimum tension and guidance of the belts.
►Long-lasting design: The consistent use of stainless steel means that the belt press not only meets the requirements of strict hygienic standards, also is built tougher to last longer.
►Flottweg Service: We are at your side at any time with years of experience and comprehensive know-how.
Recycling plastics with the Sorticanter include:
► Reduced odor because of closed system
► No influence due to the color of the solids to be sorted
► Lower thermal energy consumption, since the dewatering phase is already built into each Sorticanter.
► Minimum personnel costs, creating operating cost savings
► Separation of mixed substances that are unsuitable for static separation (fibers) This means that no mechanical dryer (screen centrifuge) is needed.
► Processing of particles possible that are smaller than 1 mm, so no impact from fans and other interfering effects
► A low-volume circulation system reduces the consumption of fresh water, while also reducing the wastewater quantity, since contaminants are largely separated out in the Sorticanter.
With a Sorticanter, it is possible to process up to 1,000 lbs or 2,500 kg of solid per hour, depending on the composition of the raw materials.
Transport and disposal costs, at over 70 percent, represent by far the largest cost item in sludge dewatering. A powerful dewatering assembly is thus an important criterion. With a Flottweg HTS Decanter in the C series, you can achieve the highest possible total dry solids in the dewatered sludge, thereby continuously saving on transport and disposal.
More than 50 years of experience in the dewatering of sewage sludge and continuous further development have gone into the design of the Flottweg HTS Decanter. This experience, combined with references from the entire world, makes Flottweg one of the leading providers of mechanical separation technology. The HTS Decanter is attractive for its performance, its efficiency, and its high cost-effectiveness. The decanters in the Flottweg C series cover a throughput range from about 5 to over 150 cubic meters per hour.
We can offer you comprehensive know-how and customized systems.
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