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Environmental Monitoring

2015:  JAN | FEB | MARCH

March 2015 Issue

Shearwater Buoy Monitors Hong Kong Reservoir
Euro Tech (Far East) Ltd. (Hong Kong, China) has purchased a specialized 1.2-meter Shearwater buoy from Ocean Scientific International Ltd. (OSIL), based in Havant, England, for installation in the High Island reservoir in Hong Kong.

The robust buoy hull is constructed from rotationally molded polyethylene, which is foam filled for added security, with a galvanized steel central structure, allowing the passage of instrumentation and cables through the water column, while offering protection for the instrumentation during deployment and operation.

The internal electronics canister for this particular system houses a Campbell Scientific (Logan, Utah) CR1000 data logger and GPRS modem for data transmission, and a separate canister holds two 33-ampere-hour batteries.

A stainless-steel top frame accommodates three 36-watt solar panels, together with a 6-decibel antenna, 1-nautical mile navigation light, and radar reflector. The 50-meter mooring has been designed by OSIL to accommodate two Hydrolab DS5X sondes, one at 5 meters depth and one at 15 meters depth. The sondes are measuring parameters such as DO, pH, turbidity and chlorophyll.

The reservoir forms an essential part of the drinking water supply for Hong Kong.

AMTs Recover Survey Data From North Sea Sensors
High-speed acoustic modem technology from Sonardyne International Ltd. (Yateley, England) has been used by Shell (The Hague, Netherlands) to successfully recover survey data from a network of long-life seabed sensors deployed in the North Sea.

To date, the network of Autonomous Monitoring Transponders (AMTs) has collected more than a quarter of a billion measurements as part of a six-year uninterrupted production monitoring study. The AMTs were originally deployed in 2010 to meet Shell’s research and production monitoring requirements. Every few hours, each AMT within the field-wide network wakes up to gather readings from a variety of inbuilt sensors, including pressure, range, temperature, pitch, roll and sound velocity. The measurements are logged and time-stamped and can be recovered on demand from the surface using a Sonardyne 6G High-Power Transceiver (HPT) acoustic telemetry modem.

For this latest data harvesting campaign, the Norwegian fishing vessel MV Elisabeth was chartered and a temporary over-the-side deployment pole installed. To this, engineers fitted the HPT modem to gather data from each AMT in the network.

Queen Mary 2 Gets New Wastewater Treatment System
One of the world’s major cruise ships, the Queen Mary 2, is being fitted with a Wärtsilä (Helsinki, Finland) advanced wastewater treatment system. This installation will enable the vessel to fully comply with the IMO’s requirements concerning the prevention of pollution from ships.

The Wärtsilä Hamworthy Membrane BioReactor (MBR) solutions are designed to facilitate the management and treatment of both gray and black wastewater, and to monitor discharges to the sea. The MBR system is an advanced wastewater treatment process based on biological degradation and membrane separation.

The 2,620-passenger-capacity Queen Mary 2 entered service in 2004 and was designed with the aim of reducing the vessel’s impact on the environment through more efficient management of waste. The existing onboard system is now due for replacement, and two Wärtsilä Hamworthy MBR 16 systems have been selected to maintain the ship’s high environmental standards.

The Queen Mary 2 is powered by four Wärtsilä main engines.

International Survey to Assess Fish Stocks
The RV Cefas Endeavour commenced an 18-day charter to the government of the Netherlands organizations Rijkswaterstaat (RWS) and the Institute for Marine Resources & Ecosystem Studies (IMARES), with local mobilization in Scheveningen, Netherlands.

The 74-meter, multidisciplinary research vessel will participate in International Bottom Trawl Survey operations in the North Sea in collaboration with vessels from other European agencies, under the auspices of the International Council for the Exploration of the Sea. The objective of the survey is to collect data for the assessment of fish stocks (e.g., cod and plaice) and to investigate changes in the ecosystem.

CROE SO2 Scrubber For MV Seagard
CR Ocean Engineering (CROE), based in Parsippany, New Jersey, announced an order from Bore Ltd. (Helsinki, Finland) for one of CROE’s exhaust gas cleaning systems, or scrubbers.

The system will use seawater to reduce sulphur dioxide emissions (SO2) from the main engine of Bore’s MV Seagard Ro-Ro container vessel. The system is scheduled to be online in late spring 2015.

Once installed, the system will allow the vessel to meet the low-sulphur ECA requirements, even when burning high-sulphur heavy oil. The CROE design has special features that will allow the ship to reduce stack sulphur emissions, even when operating in the lowest alkalinity/salinity waters of the eastern Baltic.

Effective January 2015, all ships that operate in the North American and European ECAs are required to switch to 1 percent sulphur fuel or install scrubbers to meet the equivalency standard for SO2. As an alternate, IMO has allowed ship owners to install scrubbing systems as an equivalent to fuel switching.

The small dimensions of the CROE scrubbing system make it suitable for newbuilds or as a retrofit to existing ships. The system is designed to replace the existing silencers and does not require a bypass. The system can be applied to cruise ships, ferries, bulk carriers, containerships, RoRo and other vessels. CROE offers the scrubbing system as open loop (a once-through scrubber using seawater to reduce SO2), closed loop (a recirculating scrubber design that utilizes an aqueous solution to reduce SO2), or a combination of both designs called hybrid.

2015:  JAN | FEB | MARCH

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