A customer in Greece asked for an FBBR treatment plant for a hotel to treat the wastewater produced there. The hotel produces around 200 m³ of wastewater per day. This is on the one hand sanitary wastewater from the rooms, and on the other hand wastewater from the hotel’s own laundry. The hotel also has two restaurants where wastewater is produced in the kitchens. The aim of the project was to discharge the treated wastewater directly into the Mediterranean Sea.
The challenge in this project was the different inflows and thus the different dissolved and non-dissolved substances in the wastewater. The sewage has a high organic load, combined with increased COD and BOD5. The wastewater from the kitchen contains suspended solids such as fats and oils. The customer wanted a solution with biological wastewater treatment. Since this produces secondary sludge, the plant must separate this from the clear water.
The second challenge was the seasonal fluctuations. Especially in the summer months, more wastewater is produced due to a high number of guests. The wastewater treatment plant must therefore be able to compensate for these fluctuations.
For this project, the ClearFox® team offered a wastewater treatment plant with fixed-bed technology. This consists of net tubes, which have a growth area of between 100 and 150 m² per cubic metre. The microorganisms present in the wastewater settle and grow on this surface. These clean the wastewater and form the secondary sludge that settles on the bottom of the clear water. To separate both, a ClearFox® lamella clarifier is the ideal solution.
However, the customer did not want a plug & play containerised treatment plant, but only the components to set up the plant themselves on site. Therefore, the ClearFox® engineers developed a concept to implement the customer’s wishes in the best possible way. For the fixed-bed technology, the ClearFox® team offers rotationally moulded tanks in which the blocks are installed. These are particularly stable because they have no predetermined breaking point.
Therefore, the ClearFox® team supplied two different types of rotationally moulded tanks – one for the fixed-bed technology, the other for the lamella clarifiers. In addition, the customer received detailed instructions on how to build the tanks himself and what special features he had to pay attention to. The exact connections and the timely discharge of the wastewater into the treatment plant were important. After installation and commissioning, the biological treatment performance started very quickly, so that the customer was able to discharge the wastewater directly after only a few days.
The fixed bed technology with biological wastewater treatment is versatile and can be adapted to your individual requirements. It is particularly suitable for projects with different wastewater flows and seasonal fluctuations, such as hotels, resorts or similar facilities.
The technology is ideal when different types of wastewater are generated, such as sanitary wastewater, kitchen wastewater or laundry wastewater. Accurate information on the wastewater volumes, organic loads (COD, BOD5) and possible seasonal fluctuations is important.
Yes, we offer detailed instructions and supply plug & play container sewage treatment plants that can be easily assembled on site. The planning is done in such a way that the installation can also be carried out by local specialists.
The fixed bed technology is particularly robust, low-maintenance and efficient. It offers a large growth area for microorganisms, which leads to a high cleaning performance. It also adapts flexibly to fluctuations in the amount of wastewater.
For the separation we use a slanted clarifier, which works particularly efficiently. The sludge settles at the bottom, while the purified water is drained upwards.
The system is low-maintenance. Regular inspections, emptying the secondary sludge and checking the connections are sufficient to ensure long-term functionality.
After installation, the biological purification process starts within a few days. You can quickly discharge the purified wastewater into the intended environment.
