Survey to Determine Quantities and Properties of Sewage from Naval Vessels
Abstract
A shipboard survey to dd termine the quantities of human wastes produced per capita and the physical, biological, bacteriological and chemical properties was conducted to establish the degree of pollution of harbbor waters by naval vessels and provide design criteria for a treatment system. The data show that between 10 and 20 GPD of sewage are produced per capita on ships following a normal workday routine. A maximum of twice this amount can be expected of the operation is on an around-the-clock basis. The sewage produced contains an average of 236 mg/l of suspended solids and an average biochemical oxygen demand (BOD) of 102 ppm. The geometric average coliform density index was found to be 4.8 x 10 to the 5th power. Data is also presented for the concentration of settleable solids, total solids and volatile solids present. The pH of the sewage and the dissolved oxygen present and the concentration of nitrogen present in various forms were determined. The survey also showed that the water in the vicinity of a vessel from which sewage is being discharged is not polluted to any adverse degree in terms of the commonly used parameters. Virtually no suspended solids were found in the river water and the coliform density was within the range permitted at most bathing beaches in the United States.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0455401
Entities
People
- K. Jakobson
- M. J. Posner