2007 – Inaugural WIOA NSW Water Industry Engineers & Operators Conference
17 to 19 July, 2007 Sportsworld Complex – Dubbo
Supported by: Dubbo City Council
with assistance from: Transpacific Industries Group & NSW Water Directorate
Papers are listed in order of the conference program
INNOVATIVE TECHNOLOGY FOR PHOSPHATE REMOVAL FROM DEWATERED SLUDGE SUPERNATANT Frank Gnanam – Virotec Global Solutions
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EGL operate the Redcliffe City Council WWTP, and use hydrated lime (Ca(OH)2) to treat phosphate via an existing lime slurry system. EGL have been looking at alternatives to the use of lime as it represents an OH&S hazard and the dosing process had become operationally inefficient and costly to maintain.
This paper reports on the work that Virotec Global Solutions have undertaken with EGL to develop a formulation to treat phosphates, achieving a removal rate of 99.84% (from 500 mg/L to 0.8 mg/L).
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REPLACE OR REPAIR POTABLE WATER BORE HOLES? Pat Davis – Riverina Water County Council
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As these bore start to age a decision has got to be made what is to be done with an ageing bore. This paper is based on some field experiences that Riverina Water has come across.
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RESPONSES TO POOR RAW WATER QUALITY: DESTRATIFICATION AND PAC USE IN THE ACT Craig George & Teresa Morey – ActewAGL
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Dosing with powdered activated carbon was critical for final water quality. A variety of operation and maintenance issues were associated with the high PAC consumption rates of around 50kg/hour. Destratifying mixers were installed in the reservoir during summer 06/07 as a long term algal management technique. They had an immediate effect on reservoir stratification, helping to resolve problems with anoxic water and dissolved manganese.
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EXPERIENCE OF URBAN REUSE IN WAGGA WAGGA Len Kennedy – City of Wagga Wagga
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The trial was to be based on the newly released “NSW Guidelines for Urban & Residential Use of Reclaimed Water”.The reclaimed water was supplied to 10 of 2.23 Ha rural residential properties and 75 normal residential properties. The trial has since been converted to a permanent effluent supply to the properties connected.
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MITTAGONG REGIONAL SEWERAGE SCHEME UPGRADE & COMMISSIONING Chris Carlon – Wingecarribee Shire Council
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In conjunction with the project some upgrades of the existing reticulation systems and pump stations were carried out. Installations of PLC control and telemetry systems were provided to all pump stations and the plant.
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DEMAND MANAGEMENT: A SIMPLIFIED OPERATIONAL METHOD FOR TARGETING RESOURCES TO WATER LOSS Ian Maggs – Accurate Detection
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This paper discusses a simplified operational method for monitoring water loss and targeting resources effectively. How much water am I really losing from my infrastructure and where am I losing it? When I start actively looking for leakage? Is my leakage costing me more than the cost of finding and repairing it?
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IMPROVING POTABLE WATER SAMPLE COLLECTION AND STORAGE PROCEDURES Wayne Watson – Tweed Shire Council
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In the past, the storage of sample bottles and the equipment used in the sampling process was not very good. Often they were thrown into the back of the ute in an esky and this may have had an impact on our sample results.
This paper describes the improvements made to our sample collection and storage procedure for the Tweed Shire Council Water Unit.
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THE USE OF VARIABLE SPEED DRIVES IN THE WATER INDUSTRY Jamie Pearce – ABB
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The use of variable speed drives is becoming more and more accepted and used throughout the water and waste water industry and is becoming a very effective and efficient way of maximizing the pump efficiency, providing energy savings as well as complete motor and system related protection.
This paper describes the energy saving concept behind the use of variable speed drives in water and waste water pumping applications and considerations that should be taken when designing and incorporating variable speed drives into your water and waste water application.
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TEMORA SEWERAGE TREATMENT PLANT UPGRADE Paul Gilchrist – Temora Shire Council
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SOFT WATER FOR RED EARTH – AN 80 ML/D SOFTENING PLANT FOR DUBBO Kate Miles – NSW Water Solutions, NSW Department of Commerce
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SPRING CREEK DAM UPGRADE PROJECT Stan Donnelly – Donnelly Mining and Civil
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As a result of progressive failure of the central concrete core wall the full capacity of the dam could not be fully utilised; the works were necessary to restore the dam to it’s original holding capacity of 4,500ML.
The project involved five main aspects of work; refurbishment of the 2km access road, building the main dam and a minor saddle dam, refurbishment of the intake works and construction of a new pump station.
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OPTIMISATION OF THE DORA CREEK IDEA WASTEWATER TREATMENT PLANT John Stevens – Hunter Water
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The plant has a history of operational problems which have proven hard to remedy using conventional wastewater treatment practices. This paper describes the problems encountered and the types of operational changes trialled and implemented in an effort to combat them, as well as discussing the results achieved over the past 4 years.
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THE BENEFITS OF SHADECLOTH COVERS FOR POTABLE WATER STORAGES Kristine Hunter – East Gippsland Water
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CLARENCE COLLIERY WATER TREATMENT Ken Buckby – Environmental Group – Operations
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The existing 10 ML/d water treatment plant at Clarence Colliery was augmented to treat 25 ML/d of water from the mine. Waters from underground mining works as well as water in the Leachate Pond contained elevated levels of iron and manganese. Before this water could be discharge to the Wollangambee River, it had be treated to acceptable levels through the Clarence Colliery Water Treatment Plant.
The purpose of this project was to remove iron and manganese levels so as to consistently meet the discharge water quality requirements. Clarence Colliery decided that the most effective long-term solution was to use an experienced water company to take responsibility for the scheme including the design and construction of the upgrade as well as maintaining the operations of the facility for 2 years with the option of continuing the term for a further 3-5 years.
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EVALUATING THE PERFORMANCE OF DIFFERENT POWDERED ACTIVATED CARBONS (PAC) FOR TASTE AND ODOUR REDUCTION Peta Thiel – Research Laboratory Services
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Of these carbons the Australian steam activated coal carbons, Acticarb PS1000 and PS1300 had the best removal efficiencies. The Acticarb PS1300 was the only carbon with a higher iodine number, however this increase in adsorptive capacity for iodine was not proportional to the increase in adsorption for MIB and geosmin. For all of the PACs tested, the geosmin was more easily reduced than the MIB. Contact time, raw water character and PAC character all influenced the PAC’s ability to reduce MIB and geosmin.
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TAKING ON A NEW WATER SUPPLY CATCHMENT IN THE ACT AND ITS IMPACT ON WATER TREATMENT PROCESSES Cameron Patrick & John Mihalyka – ActewAGL
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The water quality of the new catchment had a major impact on the water treatment processes and operations at Mt Stromlo Water Treatment Plant. Plant performance assessment was based on the US EPA LT2ESWTR system and to date the plant has met all turbidity targets, producing safe drinking water.
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BEENLEIGH WATER RECLAMATION FACILITY IMPROVING NITROGEN REMOVAL Ricky Collyer & Stan Stevenson – Gold Coast Water
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The reason for the upgrade was to increase the plants hydraulic capacity and further reduce final effluent nitrogen levels. The plant serves a population of approx 60,000 and approximately 20% of the plant inflow comes from an industrial catchment covering industries such as a brewery, dog food manufacturer and paper recycling plants etc.
The plants upgrade was delivered via a short term “Design, Build, Operate” (DBO) project delivery method, giving the contractor 3 years operational control after construction completion, main reason for choosing this method of delivery for this upgrade was that if you have the design, construction and commissioning all undertaken by one party you would be in a better position to ensure the plant delivers what it was designed to do.
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COLLINGULLIE WATER TREATMENT PLANT UPGRADE MANGANESE REMOVAL USING HYPOCHLORITE Peter Outtrim – Riverina Water County Council
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