Case studies
Case studies
Sepflutech carries out various studies with the help of its own engineers, which are essential for the development of systems. Some of these studies are scientifically enhanced through collaboration with universities.
At the bottom of this section, you can request various studies that provide you with an overview of different requirements. As an example, we present here the study on the separation of oily wastewater without the addition of chemicals.
Separation of oily waste water
The aim of these tests is to find out to what extent the Sepfutech technology for separating oil and solids is successful under different conditions and at different concentrations. The tests are intended to prove that the separation of oily wastewater with a combination of filtration and de-oiling system works without the addition of chemicals.
| Customer | Operator of a wastewater treatment plant (Piraeus / Gibraltar / Hamburg) |
|---|---|
| Location | Piraeus / Hamburg |
| Application | Inspection / performance test |
| Output / volume flow | 0.5m3/h |
| Required residual oil content (ppm) | 15 ppm |
| Medium | Waste water containing oil |
| Model | Test system Sepflutech OWS type SDU-0.5 |
| Test and installation period | 2016...2017 |
| Measure / result | - Performance test SDU-0.5 (tanker & shore facility) - 2017 Installation of a shore facility (50m3/h) at Green Ports Hamburg |
Development
At the beginning of the case study, a heavy fuel oil test was carried out on the "ECOFIGHTER" in the port of Piraeus in Greece. The ECOFIGHTER was built in 1991 as a general cargo ship and subsequently converted into a tanker.
Test results of the "ECOFIGHTER"
The on-site test produced the following results:
| Pos. | Time | Result OMD-24 | Samples taken | Temp [*C] | Pressure [bar] |
|---|---|---|---|---|---|
| Start | 15:00 | ||||
| 1 | 15:10 | 0 ppm | 1.1 / 1.2 | 22 | 0.6 |
| 2 | 15:15 | 0 ppm | 22 | 0.6 | |
| 5 | 15:20 | 0 ppm | 22 | 0.6 | |
| 6 | 15:30 | 0 ppm | 22 | 0.6 | |
| 7 | 15:40 | 0 ppm | 22 | 0.6 | |
| 8 | 15:45 | 0 ppm | 2.1 / 2.2 | 22 | 0.6 |
| 9 | 15:55 | 0 ppm | 22 | 0.6 | |
| 10 | 16:00 | 0 ppm | 22 | 0.6 | |
| Stop | 16:10 | 0 ppm | 22 | 0.6 |
Sepflutech two-stage OWS type "SDU":
| Output / volume flow | 0.5m3/h |
| Medium | Heavy oil of the "ECOFIGHTER" |
| Concentration of free oil at the inlet | 0.01 - 10 % |
Performance test of the OWS type SDU-0.5
The extent to which the SDU-0.5 deoiling system meets the requirements is being investigated in several series of tests.
Current situation:
- Concentrate from centrifuges and tanks enters the API for pre-separation of free oil and sediments.
- Further separation of oil and sediments takes place in flotation 2 with the addition of FeCl3 and polymer. This unit is currently not in operation, so that only water flows through without the addition of chemicals.
- The flow passes into tank 7, which is used as a buffer tank, before the water is finally treated in flotation 1. As flotation 2 is not in operation, tank 7 is contaminated with oil, which can affect the process in flotation 1 and the final biological stage.
Preparing the test
- The SDU-0.5 test unit is installed in the building belonging to the WWTP, where flotation 1 and 2 are located.
- All connections are fitted with flexible hoses to allow easy change of test conditions.
Test series
1. Connection of the SDU-0.5 between filtration 2 and tank 7
2. Connection of the SDU-0.5 between API and filtration 2
3. Connection of the SDU-0.5 between the concentrate from centrifuges and tanks and the API
Results
- The test was successful.
- The suitability of the oil-water separator type SDU can be confirmed.
- The system functions under different operating parameters and different feed concentrations. There are no changes in the system performance.
Installation
After the successful tests, it is noted that according to the customer's requirements, the Sepflutech technology helps to stabilize the current water treatment plant and make it more efficient. The customer decided to install an oil-water separator (50 m³/h).
Advantages
- separation of oil "HC" & solids before flotation
- positive effect for flotation and the biological stage
- improves performance and reduces operating costs of flotation
- saves resources, e.g. by dispensing with FeCl3 and polymer during the flotation process
- keeps the oil concentration at the flotation inlet at the same level and thus ensures stable operation
Environmental aspects
- saves on chemicals (chemical-free separation)
- no emissions (due to a pressurized system)
Installation
- deoiler SPO-S50 (20 - 50 m³/h)
- oil-water separator, according to test
- horizontal, single-stage system, equipped with Sepflutech profile package SPO incl. feed pump, control unit and fully automatic operation
- virtually maintenance-free, without the need for spare parts and consumables
- separation profiles in the SPO are resistant to all types of liquids and high temperatures
- no cleaning required, inspection recommended as part of the usual overhaul intervals (e.g. 5 years)
- can be upgraded to SDU
Installation of the Sepflutech deoiling system type "SPO-S50" (horizontal):
| Output / volume flow | 50m3/h |
| Concentration of free oil at the inlet | 0 - 20 % (100 % for short period) |
| Concentration of free oil at the outlet | < 15 ppm |
Case studies
Here you will find an overview of some of our case studies. We will be happy to email them to you on request.
- Case Study: SFT-2000, fuel care system including sterilization
- Case study: Oil-water separator for container ships
- Case study: Deoiling of refinery wastewater
- Case study: Dewatering crude oil
- Case Study: Deoiling and fuel treatment systems for national & international naval vessels
- Case study: Deoiling of oily wastewater
- Case study: Treatment of boiler water
- Case Study: Removal and separation of oil spills at sea (oil spill response)