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.
Recycling of Hydroblasting Wastewater
1991
83 pages
Report
No indication
English
Water Pollution & Control , Logistics Military Facilities & Supplies , Naval shore facilities , Recycled materials , Waste water , Adverse conditions , Boiler tubes , Feasibility studies , Field tests , Maintenance , Naval vessels , Ships , Shipyards , Steam , Test and evaluation , Test methods , Hydroblasting