Novotel Saigon Centre in Vietnam Chooses Hanovia UV Technology for Service Water Disinfection

Novotel’s flagship Saigon Centre hotel in Ho Chi Minh City, Vietnam, has recently installed six Hanovia UV disinfection systems for service water treatment. The UV systems kill any microorganisms from the incoming city water supply, leaving it good enough to drink. All the UV systems provide a minimum 99.999% reduction in E.coli, Cryptosporidium, Giardia, Legionella and other harmful microorganisms.

Two of the Hanovia UV disinfection systems installed at the Novotel Saigon Centre

Two of the Hanovia UV disinfection systems installed at the Novotel Saigon Centre

(Two of the Hanovia UV systems installed at the Novotel Saigon Centre)

Tourism is a flourishing industry in Vietnam, with over a third of all visitors coming from Europe, where water quality is taken for granted. Currently, only 22% of hotel guests are Vietnamese, with 34% from Europe, 8.6% from North America and 9.5% from Oceania [1]. Having water of a drinking quality standard is therefore a high priority for the leading hotel chains operating in Vietnam.

Microbial control in hotel and other building service water is a serious but easily overlooked problem. Hong Kong’s new government headquarters, for example, were recently contaminated by Legionella, which resides in buildings’ water cooling towers and pipes [2]. The same microbes were also found in other buildings in Hong Kong [3]. Most recently, three children at a Hong Kong school were infected by Staphylococcus aureus, a common water-borne bacteria. An update of the school’s water disinfection system is now required [4].

“Hotels across the Asia-Pacific region are now taking extra precautions to ensure their water meets the World Health Organisation’s drinking water quality guidelines and to ensure their guests’ health and safety,” commented Hanovia’s Asia Pacific Manager Ying Xu.

“Even though hotel tap water is not intended for drinking purposes, UV provides that extra level of health and safety for residents in case they inadvertently drink the water, such as while brushing their teeth, or inhale water aerosol while showering. UV is in fact the WHO’s recommended disinfection method for Cryptosporidium and Giardia removal. It is already widely used to remove both microorganisms from water supplies in the European Union and United States. Water standards in Vietnam do not include Cryptosporidium and Giardia [5], but the Novotel chain sees the importance in conforming to the WHO’s standards,” she concluded.

Traditionally, hotel water in Vietnam has been treated with chlorine. While this kills most microorganisms, it is ineffective against Cryptosporidium and Giardia, both of which are extremely hazardous to human health, causing severe diarrhoea, vomiting and fever, which can last for a month or more. Water treatment experts were unaware of the limitations of traditional chlorine disinfection until recent years. Chlorination can also affect the taste and smell of water if doses are too high.

In this installation, six, single-lamp AF3 amalgam UV systems are installed on the hotel’s roof, treating water flows between 26.5 m3/h and 30 m3/h. City water passes through sand filters before storage in roof tanks, from where it passes through the UV systems prior to distribution to every room in the hotel. These UV systems are very small and can be installed in the tightest of places.

A major advantage of using UV is its low operational cost. For example, 166 m3/hr of water is treated at the hotel. As the six UV systems only consume 1.62 kW of power between them, for every 1 m3 of treated water, the UV system consumes less than 0.01 kWh of power, which is approximately 0.1 US cents per m3.

Commenting on the installation, Hanovia’s Managing Director John Ryan said: “This is yet another successful hotel project and reinforces our expertise as suppliers of UV technology that can be used across the board: from potable-standard water in hotel rooms to chloramine-free water in hotel pools and spas.”

About Novotel
Part of the global Accor group, the Novotel chain has almost 400 hotels and resorts in 60 countries, situated in the business districts and tourist destinations of major international cities. All Novotel hotels are involved in EarthCheck, the worldwide environmental management and certification programme [6]. As of the 22nd of May 2012, 278 hotels are committed, 134 hotels are benchmarked and 109 are certified.

[1] Grant Thornton (Vietnam) Ltd., Vietnam Hotel Survey 2012, P 7
[5] National technical regulation on drinking water quality. QCVN 01:2009/BYT

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West Hanoi Crowne Plaza Trusts its Drinking Water to Hanovia UV

Hanovia’s UV technology is disinfecting drinking water for the Crowne Plaza Group’s flagship five star West Hanoi hotel in Vietnam. The UV systems remove potentially harmful microorganisms from the incoming city water supply, in line with WHO* guidelines for drinking water quality. All the Hanovia UV systems are designed to provide a minimum 99.9% reduction in E.coli, Cryptospiridium, Giardia and other harmful microorganisms.

One of the Hanovia UV system during installation at the Crowne Plaza Hotel, West Hanoi

One of the Hanovia UV system during installation at the Crowne Plaza Hotel, West Hanoi

(One of the Hanovia UV system during installation at the Crowne Plaza Hotel, West Hanoi)

“Although Hanoi’s city water supply is normally free of E.coli, the design consultant for the Crowne Plaza specified UV disinfection for its five star hotels in Vietnam to ensure all water meets the WHO’s drinking water quality guidelines,” commented Hanovia’s Asia Pacific Manager Ying Xu. “In this way the hotel group is providing an extra level of health and safety for its residents,” added Ying.

The Crowne Plaza Hotel, West Hanoi

The Crowne Plaza Hotel, West Hanoi

(The Crowne Plaza Hotel, West Hanoi)

“We selected Hanovia’s UV systems for this installation because of the company’s high brand recognition as a supplier of quality, high-end UV systems,” said a spokesperson from STD&S Co., Ltd, Hanovia’s exclusive Vietnam distributor.  “The hotel group is so satisfied with the performance of the UV systems that it has ordered more units for another hotel currently under construction in the Vietnamese coastal city of Nhan Trang,” the spokesperson added.

10 UV systems are installed in the West Hanoi hotel: four PMD medium pressure UV units and six AF3 amalgam UV units, with flow rates ranging from 162m3/h down to 5m3/h. One of the AF3 systems disinfects water for the hotel’s restaurant; the other nine treat water for all the hotel bedrooms, apartment complexes and offices.

All the UV systems treat water from a storage tank that has passed through a water softener and sand filter. Water passing through the UV system serving the restaurant also passes through a RO (reverse osmosis) filter immediately prior to UV disinfection, offering an additional level of protection.

Additional benefits of Hanovia’s UV technology mentioned by the contractor include low maintenance; ease of use; low operating costs; no high-temperature issues with the AF3 systems, which are quite capable of handling high water temperatures; and the multi-functionality of the PMD systems’ control systems, which are easily integrated with bleed valves to control water temperature.

Commenting on the installation, Hanovia’s Managing Director John Ryan said: “This is an interesting installation for Hanovia. Many of our existing hotel installations are for swimming pools and spas, but our expertise in providing UV water disinfection systems for high purity applications in the pharmaceutical, food and beverage industries means we are well-placed to provide similar systems for water treatment in hotels or other public buildings.”

The WHO describes UV radiation as “biocidal between wavelengths of 180 and 320 nm. It can be used to inactivate protozoa, bacteria, bacteriophages, yeast, viruses, fungi and algae.” More information is available in this microbial fact sheet (PDF).

* World Health Organisation

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