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Category Archives: Infrastructure

Griffith University Reverse Osmosis Water Treatment System

RWTS was successfully awarded a contract at Griffith University to deliver a Reverse Osmosis water treatment system to supply demineralised water to the lab sinks at a nominated flow rate.

Client: Griffith University

Location: Brisbane

Solution: Reverse Osmosis water treatment system

Industry: School

 

BACKGROUND

Griffith University recently constructed a high end laboratory in their new state of the art ‘Aviation Building’. Griffith University required purified water for cooling, cleaning and sampling and testing requirements, within these laboratories.

RWTS were successfully awarded the contracted portion to supply a suitably design two pass Reverse Osmosis (RO) water treatment system, with prefiltration and loop line disinfection to supply demineralised water to the laboratory sinks at a nominated flow rate.

THE RWTS SOLUTION

REVERSE OSMOSIS WATER TREATMENT SYSTEM

The Griffith University reverse osmosis and demin polishing system uses RO technology to remove dissolved salts from a suitable raw water source.

The system designed and built for Griffith University is configured specifically for slightly variable raw water TDS to accommodate seasonal changes in raw water quality being delivered by Urban Utilities.

The RO water treatment system is designed using a staged approach.

The first stage, “Pre-treatment” removes suspended solids down to 1 micron in size, stripping the total chlorine from the water and removing calcium/magnesium hardness, iron, manganese and aluminium, before the final treated water is fed to the reverse osmosis system for further treatment.

The reverse osmosis water treatment system is a “double pass” system, with the permeate from the first pass sent through a second pass to produce a high quality permeate that is always less than 1 us/cm in quality and typically averages less than 0.5 us/cm.

The last stage of treatment is ultraviolet disinfection combined with mixed bed demineralisation resin, which removes bacteria and trace solutes such as sodium and chloride down to extremely low levels, to produce a treated water quality that is as low as 0.1us/cm in quality.

A water storage tank, a treated water loop delivery pump unit and the required valving and instrumentation completes the delivery of the treated water to the laboratory. In addition multiple outlets are provided a low pressure demineralized water supply at all times by the system.

The Griffith University reverse osmosis system is designed to operate with advanced automatic flux control methodology.

This methodology involves the utilization of automatic modulating valves on the concentrate and recycle streams of the system, flow meters on the concentrate, recycle and permeate streams for flow feedback to the PLC.

The water treatment system automation is controlled through the RWTS proprietary Allen Bradley HMI PLC combined with Bacnet control back to the University BMS system. This system provides accurate and reliable control based on operator adjustable setpoint targets for production and system membrane flux.

Results:

Purified water for cooling, cleaning and sampling and testing requirements within the Griffith University laboratories at a nominated flow rate.

Seamless automation and programming to ensure equipment is easy to operate and maintain, and not fail when the placed under full demand.

NEED AN INNOVATIVE SYSTEM THAT DOES NOT FAIL?

If you are wanting a system that works all day every day with the ability of remote monitoring, please call one of our friendly engineering team today to discuss your water treatment options for your beer brewery.

Engineered water treatment system for the township of Linville: SEQWater

RWTS were subcontracted by SEQWater to design and manufacture a engineered water treatment system for the township of Linville. 

 

Client: Practical Engineering and SEQwater

Location: Linville municipal water treatment plant

Technology implemented: Engineered water treatment system for the township of Linville

Industry: Infrastructure

 

BACKGROUND

Due to the 2013 floods and changes in raw water from the Bores supplying the original Linville Water Treatment System, the Linville township potable quality of water could not be guaranteed. As a consequence of the environmental changes that were affecting the Linville township water quality the original water treatment system needed to be decommissioned. In the past seven years as an interim solution the potable water from Kilcoy Potable Water Treatment Plant was trucked in and pumped into the town reservoir which serviced the town requirements. This was not going to be sustainable in the long run and thus RWTS was engaged to provide a water treatment solution to meet the township long term needs and requirements.

CHALLENGES

Due to the non release site, a minimal waste water was being generated; which resulted in common back washable filter types not being a viable option.

THE RWTS SOLUTION

FILTRATION | ULTRAVIOLET DISINFECTION SYSTEM

RWTS partnered with Practical Engineering – a specialist project team who were given the opportunity to construct a purpose designed and engineered water treatment facility and compound. The Water treatment process required by SEQwater had strict specifications and needed to meet a specific virus and protozoa log reduction through various forms of treatment application and disinfection packages.

RWTS proposed a validated absolute replaceable cartridge filtration process with no backwashing requirement, validated Ultraviolet Disinfection System treatment and residual chlorine disinfection equipment. SEQwater process engineers agreed to the proposed process offered and the design was signed off as a viable solution for the township of Linville. RWTS was engaged and responsible for the turn key water treatment process, procurement, engineering, installation, commissioning and operator training hand over package to client.

Work commenced in late 2019 and was successfully completed in April 2020 after extensive performance testing was completed over a period of 6 weeks.

RESULTS

The Linville township was successfully supplied by RWTS with treated potable water via a custom designed turn-key potable water treatment system. The  water treatment system RWTS implemented provided a high quality potable water source conforming to the Australian Drinking Water Guidelines standards and strict guidelines outlined by the utility provider SEQwater.

Ultrafiltration System: Veolia Energy and University of the Sunshine Coast

RWTS were subcontracted by Veolia Energy to design and manufacture a ultrafiltration system (UF) for the University of the Sunshine Coast.

 

Client: Veolia Energy; University of the Sunshine Coast (USC)

Industry: Infrastructure – School and Universities

Systems: Ultrafiltration

 

BACKGROUND

The University of the Sunshine Coast (USC) is a leading tertiary education provider, catering to over 11,000 students on Queensland’s Sunshine Coast. USC prides themselves on their commitment of sustainability; with an active program to better manage waste, water and recycling. In an effort to minimise the use of potable water from the local council, USC engaged Veolia Energy to implement a ultrafiltration system (UF). RWTS were subcontracted to design and manufacture the water waste management system.

The water reclamation system treated water from the on-site holding dam to a potable standard. Furthermore the water was able to be used for cooling tower makeup (through evaporation) as part of the university’s air-conditioning system.

CHALLENGES

Due to site space limitations, RWTS was required to design the plant to operate effectively within a small footprint.

THE RWTS SOLUTION

Industrial Ultrafiltration System

USC Water Reclamation System - Ultrafiltration

RWTS developed an ultrafiltration system (UF), with pre-filtration to purify the raw lake water. This removed all suspended solids and microbes to ensure high quality treated water.

The design flux of the UF system, RWTS needed to design the system to be capable of treating up to 10 kL of net permeate production. Advanced UF modelling software allowed RWTS to develop the basis of the water reclamation design, that was signed off by Veolia Energy engineers.

Due to the challenges with width restrictions within the plant room, tall, hollow-fibre ultrafiltration membranes were chosen for the design. This minimised the system’s lateral footprint through stand height membranes. The membranes were procured from our oversea supplier through many years of R&D.

The waste generated from the ultrafiltration (UF) system through chemical cleans and enhanced backwashes was captured into a waste holding tank. It then underwent a staged correction process with validation prior to the release to the council sewer network. This process was approved by the contractor and local plumbing council, meeting the strict trade waste guideline release limits.

The operating system took the form of an Allen Bradley PLC with HMI screen. Functional description (FD) was written and programmed by our in-house electrical division for approval by Veolia Water. The water reclamation system build saw RWTS use quality analytical and pumping components from trusted suppliers, including as Grundfos, Burkert and IFM.

The project was completed and handed over to client Veolia Water in June 2019. Both the University of the Sunshine Coast and RWTS were pleased with the delivered outcome and the system is currently being managed by Veolia Energy site operators.

EcoFarmer Waste Water Treatment Plant: Miles Airport

Slide Slide Slide EcoFarmer

RWTS was tasked with implementing a waste water treatment plant for the Miles Airport in Queensland. 

This project involved the design and construction of a waste water treatment plant as well as its installation and commissioning. The design integrated a wastewater disposal system to the surrounding gardens to re-purpose treated effluent.

Based on the unique requirements of the airport, RWTS chose employ an EcoFarmer 50 – Class B.

Wastewater Treatment Plant and Servicing: Kimberley College

Slide Kimberley College 1 Slide Kimberley College 2 Slide Kimberley College 3

A customised treatment process for a growing school community in Carbrook, Queensland. 

RWTS were engaged by Kimberley College to rectify their waste water treatment facility. A key consideration for the development plan was the expansion of the school from 600 to 1,200 students.

Due environmental sensitivities, RWTS worked in conjunction with environmental engineers to develop a sustainable solution. All submissions were passed and approved by the local governing authority and the Department of Environmental Resources Management.

Due to the nature of the waste stream, RWTS process engineers needed to combat the higher than anticipated Nitrogen/ Ammonia loading that would be placed on the plant. This was done through various treatment processes, resulting in a Class B final effluent waste stream before further treatment by a customised ultrafiltration plant yielding Class A water fit for site release. The ultra-filtered water with a turbidity of less than 1 NTU is used as irrigation for the site through various methods as to not make contact with the students.  A 100 m3 panel tank forms part of the irrigation design accommodating for days’ worth of final storage capacity as to not irrigate through rain events an automated rain gauge sensor diverts the treated waste stream from the day irrigation storage tank to the holding tank for further irrigation when weather permitting. The system was then placed through an extensive commissioning phase with daily sampling and weekly nutrient and biological testing completed by the Redland City Laboratory and accepted and signed off on by all relevant governing personnel.

RWTS 3 years on still maintain the service contract for the school and assist in making sure the water is within release limits.

Sewage and Potable Water Treatment, and Water Reclamation: Horizon Shores Marina
Horizon Shores Marina

RWTS facilitates the servicing and ongoing growth of Horizon Shores Marina.

To date, RWTS has upgraded the sewage treatment facility, potable water system and water reclamation plant to ensure Horizon Shores Marina’s site complies with the Gold Coast City Council regulations.

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