Jl Tukad Batanghari VIII/7A – Denpasar – Bali – Indonesia

Water and Wastewater Systems

Jl. Tukad Batanghari VIII/7A – Denpasar – Bali – IndonesiaTel: (62) 361 7910518 Fax: (62) 361 7910518

Water and Wastewater Systems

Drs. Agustinus Agus Purwanto, MM

Water usage levels and patterns

Water consumption levels vary – Type of hotelType of hotel– Location– Facilities– Managerial attention to water usage

Larger properties use more water per room than smaller

– As the level of services increases, so does water ticonsumption

– On-site laundry– Kitchens

Irrigation– Irrigation– Cooling towers

The basic structure of water systems

Deduct meters—no disposal charges on cooling towers, irrigation, swimming poolSubsystems and isolation devices

– Fire systems– Potable systems

Hot/ ColdHot/ ColdEquipment/ Human use

– Backflow preventersBuilding water system pipes

l i d i– galvanized iron– Steel– Copper– Plastic (PVC, CPVC)( , )– Contain water under pressure

The basic structure of wastewater systems

Storm sewer system (rainwater)Sanitary sewer system (removal of wasteSanitary sewer system (removal of waste products)

– Grease separator or grease trapF ilit d t– Facility owned sewage systems

septic tankstreatment plants

Plumbing risers– Plumbing risers– sewer gas traps– Vents

Pi i l ti (t t h t l d ti )– Pipe insulation (to prevent heat loss, condensation)

Water quality problems

PotabilityBacteria

AestheticsColor– Bacteria

– Nitrates– Trace metals

Organic chemicals

– Color– Odor– Taste

Clearness– Organic chemicals – Clearness– Mineral content– Acidity/alkalinity

L i i ' DiLegionnaires' Disease– bacterial growth in

cooling towers

Water heating

Heating cost exceeds water costSafety equipment - proper installation

(mixing valves)Separate water heaters/boosters for kitchen needsDedicated water heating systems for laundry operations

Water heating options

Traditional options– directly fired water heaters– indirectly fired water heaters

N t diti l tiNon-traditional options– heat pump water heaters

waste heat recovery– waste heat recovery– solar energy

Water system maintenance issues

Treating water to make it appropriate to the application needreplacing sacrificial anodesp gcleaning filters and strainerslubricating pumpschecking hot water temperature settingschecking pressure relief valvesrepair of leaking valvesgeneral caulking, sealing

t h t i tiwater heater inspectionswastewater system clearinginspecting and cleaning gutters, roof drains, site drainage

Water for entertainment andWater for entertainment and recreational purposes

Landscaping elementsF t i– Fountains

– Ponds/ Lakes– Streams

Recreation– Swimming pools

Slides– Slides

Pool maintenanceInvolves cleaning the pool, equipment, and waterSkimmingSkimmingVacuumingBrushingLi b ild lLime buildup removalEquipment pumps, filtersWater pH level 7.2 to 7.6Chlorine and algicide control algaePool heating

Water conservation

encouraged by rising costs, decreasing availability and government restrictions onavailability, and government restrictions on water usageConservation strategies– low-flow shower heads (check guest reaction)– re-use of water (gray water)– careful control of landscape irrigationp g– foot-operated faucets in kitchens– keeping up with basic maintenance on water

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