Cruise blues.

• Author: Hargrove, John
• Position: Letter to the editor

In the July/August issue, P.W. McRandle said that typical ocean-going cruise ships dump more than 750,000 liters of raw sewage each week. Without comment on the reliability of that estimate, it occurred to me that these behemoths could without much trouble carry onboard small aerobic wastewater treatment units that can easily treat to secondary standards the approximately 30,000 gallons per day of wastewater those numbers equal. Additionally, these small wastewater...