Cruise Ship Waste
Cruise Ships have an ongoing problem – in fact all shipping fleets, large and small, have a similar issue. What do ships do with the waste generated on board whilst at sea? Big Shipping Lines spend huge amounts of money on trying to resolve this. However, the basic fact remains – the more people – the bigger the problem!
Sewage, grey water, food waste, sulphides from exhaust gasses, bilge water, holds that need cleaning out. Cruise ship waste is a big issue due to the amount of people on board. Free food usually means no accountability as to how much is wasted. That is true both of guests and staff.
”Some 30 million people board cruise ships every year. And while they might return to land with fond memories of umbrella drinks and shuffleboard, they leave a lot at sea. About a billion and a half gallons (5.7 billion litres) of sewage , in fact.”
Quote from Friends of the Earth
The US Environmental Protection Agency estimates that single 3,000-person cruise ship pumps 150,000 gallons of sewage—about 10 backyard swimming pools’ worth—into the ocean per week. One vessel in an EPA study produced 74,000 gallons of sewage in a single day.
What can we do about it?
Ports rarely have their own effluent or sewage treatment works. Ships off load food waste, grey water and sewage onto a fleet of lorries to drive it away to be processed. This is classed as hazardous waste which will be charged at a premium rate. Adding in the distance travelled by the tankers, contributes to the expense incurred. Cruise ship waste needs to be addressed with an economical solution that helps the environment and the industry.
Flushing out the bilges or cleaning the sulphides out of open exhaust scrubbers is often completed in port – and the contents are dumped into the harbour. Alternatively, it is hastily cleaned out on the approach thereby leaving a trail of debris behind them.
Cruise ship sewage – it’s easier and cheaper to pump it over the side. Ship waste is not something that any of the major cruise liners want to advertise to their customers. Offloading waste when in a port, needs to be completed when the clients have disembarked. Otherwise you run the risk of an unpleasant odour drifting up to customers. Not the final memory they are looking for!
The most obvious solution is to treat waste on board ship. Rather than pumping the cruise ship sewage, food waste and grey water over the side – : Vision Marine will install a treatment plant that reduces the waste considerably. This enables it to become economical to empty the contents in port as the volume is reduced.
For land based systems go to our parent company.