Page 44: of Maritime Reporter Magazine (February 2013)

44 Maritime Reporter & Engineering News ? Februaryry 2013 Hyde produced its Þ rst system in 1999 and in- stalled its Þ rst system on the M/S Coral Princess in 2003. The Hyde system was the Þ rst accepted into USCG STEP program in October of 2008. Hyde GUARDIAN has now been installed or speciÞ ed on over 160 ships (200+ systems), and is most commonly found in use in the cruise, par- cel tanker and container markets.Hyde?s GUARDIAN features a two-stage pro- cess; stacked disk Þ ltration to remove sediment and larger organisms, and a UV disinfection unit to kill or inactivate smaller plankton, bacteria and other pathogens. During ballasting, water is processed through both Þ lter and UV stages. All captured solids and organisms are discharged during backß ushing to the location they entered. During de-ballasting, the Þ lter is bypassed and water ß ows only through the UV system before discharging overboard. Hyde GUARDIAN sys- tem and ballast operation data are automatically logged.Hyde GUARDIAN uses a high intensity ultra-violet (UV) treatment as a means of disinfection. The UV chamber is designed for minimum pres- sure drop, maximum retention time, and compat-ibility with the marine operating environment. The medium pressure lamps produce a polychro-matic output across the entire spectrum of the germicidal curve and have an expected service life of up to 8,000 hours.The Hyde GUARDIAN Ballast Water Treatment Systems have IMO Type Approval for capacity from 60 to 6000 cu. m./hr., and a Type Approval CertiÞ cate has been issued by Lloyd?s Register on behalf of the UK Maritime and Coastguard Agency to conÞ rm compliance with Guidelines contained in IMO resolution MEPC.174(58). Other certiÞ cations include ABS, Dutch Flag State, Russian Maritime Registry of Shipping, DNV (Hazardous Area Certi Þ cation) and DNV EC-Type Examination Certi Þ cation.www.hydemarine.com TECHNICALBALLAST WATER MANAGEMENT SYSTEMS Hyde MarineHyde Guardian N.E.I.In 2002 N.E.I. began development of a de-oxygen-ation ballast water treatment system ? the Venturi Oxygen Stripping (VOS). In 2007, N.E.I. obtained the world?s Þ rst IMO Certi Þ cation-Liberia. Venturi Oxygen Stripping (VOS) is a physical pro- cess, which removes Dissolved Oxygen (DO) from the ballast water during intake only (no retreatment is required during discharge). VOS does not require any Þ ltration or active substances, and does not require changing ballast pumps due to ß ow restrictions. VOS leverages a highly efÞ cient Stripping Gas Generator (similar to an Inert Gas Generator) to produce a very low oxygen gas (Stripping Gas). This gas is introduced to the ballast water via a Venturi Injector (VI). The VI generates extreme cavitation/vacuum in-line, creating a bubble emulsion in the ballast water. Within ~10 sec- onds, more than 95% of the DO is stripped out of so-lution, and simply vented to atmosphere. Any species dependent upon oxygen is suffocated, treating many controlled species within an hour. However, the oxygen levels are high enough to prohibit anaerobic life. Many organisms are treated during the venturi phase of treat- ment itself (due to the sheering forces intrinsic to the cavitation process).VOS is currently Type Approved with a Treatment Rated Capacity (TRC) of 6,800 cu. m./hr. VOS equipment has been installed on Bulkers, Tank- ers, and Containerships. A total of 58 systems have been sold to date; speciÞ cally, 21 Installed (3 vessels not yet commissioned), 18 commissioned vessels, www.NEI-marine.com MR #2 (42-49).indd 44MR #2 (42-49).indd 442/3/2013 1:15:08 PM2/3/2013 1:15:08 PM