Wastewater management on board any vessel or offshore installation is more than just having a wastewater treatment plant. A wastewater management system needs to be designed properly. From wastewater collection via sludge handling to effluent discharge. Sewage treatment plants, black and grey water lines, grease separators, system separators preventing microbes from spreading against the flow from wastewater lines into freshwater systems, holding tanks, tank aeration, transfer systems, sludge tanks, sludge processing facilities and performance monitoring are all part of the system. Off course, every project is different and therefore the wastewater management system has to be customized to cover the specific conditions on board.
With our vast experience and know-how in wastewater treatment on board ships of more than 45 years in business we are there to help you overcome these challenges in the best possible way. Our team of highly qualified engineers is at your service.
There are a few key factors that influence how well a wastewater treatment system performs
First and foremost, food waste and wastewater lines have to be strictly separated from each other. Food waste has a much higher BOD5 (Biological Oxygen Demand) value than raw sewage and heavily increases the organic load on the sewage treatment plant. Grey water from galleys needs to run through a properly designed and dimensioned grease separator before being stored in a holding tank. Grease from galleys will not only plug up pipes and sensors, but also catalyzes the build-up process of hydrogen sulfide, which is a toxic and extremely smelly gas inside the holding tanks. In the worst case, sulphuric acid may be formed inside the holding tanks which then attacks the piping and leads to a degradation of the effluent values.
Further questions concerning wastewater management on board, for which we would be happy to support you as consultants, could be, for example:
- How to layout a proper wastewater management system in the early design stages of a new build?
- Sewage, foodwaste and other substances: What should go where?
- Where to place grease separators in a wastewater management system?
- How to dimension holding tanks?
- How to convert existing tanks to act as Moving Bed Bioreactors (MBBR)?
- Where to place the sewage treatment plant?
- Where to place and how to arrange holding tanks?
- How to manage multiple holding tanks as a system?
- How to prevent the formation of odours or gases in holding tanks?