Accession Number:

ADA243847

Title:

Recycling of Hydroblasting Wastewater

Descriptive Note:

Final rpt. Oct 88-Sep 91,

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s):

Report Date:

1991-10-01

Pagination or Media Count:

84.0

Abstract:

The objective of this project undertaken by the Naval Civil Engineering Laboratory NCEL is to develop a recycling technology for reducing the volume of boiler hydroblasting wastewater at Naval Shipyards by up to 90 percent. Steam boiler tubes of a Navy ship undergoing regular overhaul are cleaned twice by hydroblasting. The first washing is performed before ship overhaul and the second washing after ship overhaul. The initial feasibility study, completed in FY88, involved bench scale work at NCEL and pilot scale tests at Long Beach LBNSY and Norfolk Naval Shipyards NNSY. Full scale field tests were conducted at NNSY in FY89. The wastewater recycling process consisted of five steps collecting, settling, filtering, reconditioning, and reusing. All five steps were successfully demonstrated in the three series of field tests. These tests were assisted by and coordinated with NNSY and Naval Ship Systems Engineering Station NAVSSES. The results show that the hydroblasting wastewater could be recycled nine times to achieve 90 percent reduction without any adverse effect.

Subject Categories:

  • Water Pollution and Control
  • Environmental Health and Safety

Distribution Statement:

APPROVED FOR PUBLIC RELEASE