The Bibby Line in Liverpool, one of the oldest privately owned shipping companies in the world, had an urgent need in late 2006 for an effective and robust water disinfection system coping with a daily flow of 300m3 for both cold and hot water supplies for the Bibby Progress, one of their fleet of floating hotels which was on its way to Nigeria under long-term lease with Chevron to provide three star accommodation and board for up to 900 workers who are constructing a gas-liquids plant in the Niger Delta.
This vessel is used as an offshore floating hotel to supply the petrochemical industry with several hundred workers.
There are 155 furnished bedrooms each measuring 24m2 that can accommodate up to 6 people. All 155 bedrooms have an en-suite facility comprising of toilet, washbasin and shower. There are additional public washrooms with toilet facilities and laundry rooms. Also, the ship has a fully equipped kitchen and room to serve 350 people per sitting.
Chevron could not guarantee the quality of the potable water supply in the Niger delta, so both Chevron and Bibby agreed that the only solution was a water disinfection treatment system that could deal with any type of microbial contamination, ranging from Legionella to Cryptosporidium. And there wasn’t much time left for designing and installing a system before the vessel left Rotterdam for Nigeria.
Trustwater met the challenge of the installation, providing the Bibby Progress with an automated onsite TrustwaterTM 180 generator.
Water is pumped by the floating hotel and taken from the draw off point. A water filter takes out any large sediment to prevent fouling of the generator. The filtered water is then softened and passes to the brine tank and TrustwaterTM generator. The TrustwaterTM generator draws brine and generates fresh Ecasol that falls to a storage tank. Multiple level switches turn the TrustwaterTM generator on & off and prevent the dosing pump running dry. A free available chlorine monitoring system receives treated water from the main water line and reads the FAC content of the water. The water used for FAC monitoring is returned to the main storage tank via the return water line. Waste from the descale/generator process is pumped to drain. The TrustwaterTM 180 is fully automated and if left unattended a visual alarm and SMS message identifies when brine and descale tanks need topping up.
Since Bibby Progress’ arrival in Nigeria the TrustwaterTM system has consistently and reliably maintained the quality of the water supply since commissioning in early 2007. The solutions produced by the generator are not only use to treat the incoming water but is also used for surface disinfection, fresh fruit and salad washing, Odour control in and around WCs, producing Ecasol Ice, Beer Line cleaning and fogging wide areas and ventilation systems. The TrustwaterTM 180 is set to automatically produce Ecasol until a day tank is filled. The TrustwaterTM 180 requires electricity, a water supply and salt made into a brine solution. The ships water flow is measured and Ecasol is dosed into the tap water. The TrustwaterTM 180 replaces a UV system that required regular bulb replacement and required over ten times the power resource.