Oily Water Separators

Vessels produce mixtures of oil and water daily, which creates a necessity for onboard oily water separator systems that assure the dirty water is entirely separated from oily contaminants before it is discharged into the sea where it could potentially have a harmful impact on the ecosystem. The International Maritime Organization (IMO) regulates through the MARPOL convention the acceptable level of oil in bilge water that ships can legitimately discharge into the ocean. The maritime regulations demand the oil content in the processed water to be less than 15 Parts Per Million (15 PPM).

Thus, it is a mandatory requirement for all vessels to have oil discharge monitoring and control systems as well as proper oil filtering equipment known as Oily Water Separators (OWS).

As part of the system that separates oil from water, the 15 PPM bilge alarming monitor is an important component that works in conjunction with the 15PPM oily water separator itself. Its purpose is to attract the attention of the crew in case proper filtration is not achieved, ensuring waste water is safe for disposal.

Express Dock make sure your vessel is compliant by providing you with 15 PPM bilge alarms that are precise and greatly dependable.

How do bilge water separators work?

Most Express Dock oil water separator systems employ gravity-based separation techniques, coalescence and filters to remove oil and solid particles from water. The process typically involves multiple stages, including pre-treatment, oil separation and polishing stages to achieve the desired level of purification. A typical express oil water separator system consists of several key components.

These may include a feed pump to transfer the oily water, a pre-treatment stage to remove larger solid particles and debris, an oil-water separation chamber where the oil is separated from the water, coalescing media or plates to enhance the separation process and a polishing stage to further refine the treated water. Once the oil is separated from the water, it is collected and stored for proper disposal or recycling.

There are three main categories of oil-water separators available: vertical gravity, coalescing plate, and hydrocyclone. Coalescing plate separators are designed to reduce the oil content in water to approximately 10 ppm.

Hydrocyclone separators, on the other hand, aim to treat water to around 5 ppm oil content. Lastly, vertical gravity separators are capable of reducing the oil content in water to about 50 ppm. Moreover, oily-water separators are recommended to be used for compressed air systems present on the ship. For instance, air compressors in the engine room produce condensate which might be contaminated with oil as a byproduct. Having an external oil-water separator is essential for taking care of the compressed air systems on the vessel and following environmental rules for disposing of compressed air condensate properly.

Express Dock offers the following services with regards to oily water separator alarming equipment:

Installation and Commissioning

Before installation, our specialists will ensure to correctly plan and prepare for the process. They will determine the appropriate location for mounting the alarm sensors within the oily-water separator. Factors such as accessibility, visibility and proximity to critical areas will be considered in order to guarantee the optimal framework has been chosen.

Typically, sensors are positioned at key points where oil or water levels need to be monitored. These locations may include the oil collection chamber, water outlet, or other critical areas. Additionally, Mr. Marine Instruments & Controls will establish proper electrical connections for the alarm system, which includes connecting the sensors to the alarm control panel or interface unit. Then, the alarm instrumentation will be integrated into the control system of the bilge water separator in case one is present.

Once the physical installation is complete, our expert technicians will perform initial tests to verify the proper functioning of the alarm system. Testing each sensor individually to ensure they are detecting the desired parameters accurately is paramount. Moreover, they will configure the alarm system settings according to the operational requirements, such as threshold levels for oil content or water levels that trigger alarms During the commissioning phase, Mr. Marine Instruments & Controls will validate the alarm system’s performance by conducting comprehensive tests. Various abnormal conditions or scenarios will be simulated to ensure the alarms respond correctly.

Calibration and Certification

Calibration typically involves comparing the readings of the oil-water separator alarms to known standards or reference devices. Our team also intervenes in this phase to guarantee the alarm system is optimized. The process itself involves adjusting the alarms to align their readings with calibration standards. Ideally, alarms of oily water separators should be calibrated annually at the least to prevent any malfunctions or flaws that might occur.

Through the certification process, Express dock Instruments & Controls will assure the alarms meet industry standards and regulatory requirements. Our technicians have the expertise to evaluate and certify the compliance of oil-water separator alarms.

Scroll to Top