Buffet clearing at a cruise galley: volume per service

Two seatings, 3,800 passengers, and roughly 1,900 kilos of food waste a day in a galley that sits three decks below the dining room. Nothing goes overboard, nothing goes down a drain unless it has been through a treatment plant, and the bins are emptied at the next port. That is a very different set of constraints from a shore kitchen, and the dosing plan has to be built around them.

The first thing a new galley manager learns is that the second seating is not a repeat of the first. It is a wetter, faster, messier version of it.

Two seatings, two profiles

First seating clears at 7.15 p.m. The waste is dominated by plate scrapings: meat, potatoes, vegetables, bread. Free liquid is moderate because the plates have been carried a short distance and the sauces have been mopped up by the food.

Second seating clears at 9.30 p.m. By then the buffet has been standing under lights for two hours. Desserts have softened, ice has melted into the fruit, the carving station has a pool of juices, and the salad bar has wilted into a wet mass. The same volume of waste carries noticeably more free liquid, and it arrives in a rush because the galley needs to be turned around for the late buffet and the night cleaning.

A dose set for the first seating will under-set the second. In practice, the second seating needs 20 to 30 percent more gel per bin, and the crew needs the bins emptied and re-dosed between the two rather than topped up.

Where the gel station sits

The scullery is the right place: near the tray drop, with a wash-down drain, and out of the traffic path between the hot line and the dining room. What does not work is placing the polymer at the buffet itself, which happens on some ships because the crew who clear the buffet are not the crew who run the scullery.

Dosing at the buffet means carrying powder through a public area, which is a dust and contamination risk, and it means the bins at the buffet are dosed by people who cannot see how full they are getting. Keep the powder at the scullery, keep the bins at the scullery, and let the buffet waste travel on a trolley in a lidded container.

Holding time to port

This is the constraint that shapes everything. A ship may hold food waste for 24 hours or for several days, depending on the itinerary and the port’s reception facilities. A bin dosed at 10 p.m. and held for three days is a different problem from one held overnight, and the difference is not linear.

What happens over three days: the gel continues to absorb, releasing water as it equilibrates, the surface dries into a crust, and the crust cracks. Odour develops under the crust, not on it. When the bin is finally tipped, the crust breaks and releases a concentrated smell, which is exactly the moment a port inspector is standing nearby.

The practical response is a slightly higher dose for long holds, a closed lid at all times, and a storage location that stays below about 15 degrees Celsius. Most ships have a chilled waste room for exactly this reason; if yours does not, the hold time needs to shorten or the dose needs to rise.

Records the environmental officer keeps

Every ship has someone responsible for waste records under the relevant marine pollution rules, and they will want four things from the galley: kilos of food waste per day, the destination and date of discharge, the treatment method, and the bin numbers involved. Gel usage is not usually a required field, but it is useful, because it explains weight variations between legs of a voyage.

A galley that gells will show higher waste weights than one that does not, for the same menu, because the water stays in. If that discrepancy is not explained in the records, it looks like an accounting error, and somebody will spend a week chasing it.

The segregation problem

Cruise galley waste arrives mixed with packaging: cling film, foil, sachets, plastic cups, and the small glass jars that come with premium items. Gel does not care, but the discharge rules do, and a load with visible plastics can be refused at the port.

Two apertures at the tray drop, one for food and one for packaging, do more than any amount of crew briefing. If the scullery layout cannot accommodate two apertures, put a packaging bin at the end of the tray drop and make the last person on the line responsible for a visual check before the lid goes down.

If you are reviewing a galley routine, the useful starting point is a per-service weigh-in across three days, separated by seating. Most ships find the second seating is carrying 25 percent more liquid than anyone assumed, which is enough to explain a recurring problem with bins that pass in the evening and fail at the port. Product grades for high-liquid, long-hold waste are listed on the SAP powder products page.