Stream G: Emerging Technologies

 

Monday

3.4 Bringing good things to light! The Coquitlam UV disinfection project

3.5 Why do you need a SCADA communications master plan?

3.6 Side-stream and main stream deammonification for efficient nitrogen removal

Tuesday

8.1 Waste activated sludge fermentation: New kid in the EBPR block

8.2 Using peracetic acid as a disinfectant at Metro Vancouver's northwest Langley wastewater treatment plant

8.3 Waste Water Heat Recovery at the Gateway Theatre, City of Richmond BC

8.4 AMI successes and challenges

8.5 To get an innovative project, you need an innovative RFP process – The new Sechelt WWTP

8.6 Use and validation of three-dimensional computational fluid dynamics in the design of weirs and spillways

8.7 WWTP bio-refineries – Innovation paving the road from NIMB to pride

 

 


3.4 Bringing good things to light! The Coquitlam UV disinfection project

Presented By: Andrew de Boer, Metro Vancouver.
Time: Monday, 3:45 – 4:15 PM

The existing Coquitlam water treatment plant produces approximately 370 million litres per day (MLD) of treated water on an average day. Metro Vancouver recently completed construction of the ultraviolet (UV) Disinfection Project to enhance the primary disinfection of the Coquitlam source and complement the existing ozone process. The project has a design capacity of 1,200 MLD and includes a new UV treatment plant, associated valve chambers to regulate the flow through surrounding mains, an operations and maintenance centre that houses a control room, offices, meeting room, and laboratory, and upgrades to the existing ozonation plant. The facility includes sustainable features such as a green roof, fish habitat enhancement and a hydronic system that uses raw water to heat and cool the treatment building.

This presentation will provide an overview of the unique design features of the project and present operating performance data for UV disinfection downstream of ozonation.

 pdf icon Presentation PDF


 

3.5 Why do you need a SCADA communications master plan?

Presented By: Tom Dunn, Opus DaytonKnight.
Time: Monday, 4:15 - 4:45 PM

Why does a Municipality need a SCADA communications "Master Plan?" Good question. As an initial step for any Municipality to moving forward toward a fully integrated and comprehensive SCADA implementation program, a communications master plan is essential, as it is the base infrastructure and foundation of how data will be transferred between various facilities and the Command Centre. In developing the communications master plan components such as key business drivers for corporate integration, risk assessment, need for standardization, optimization, sustainability, security, and operability need to be addressed.

Radio path analysis will also need to be undertaken to identify infrastructure locations, towers and structure heights, optimal locations, and usage of Municipal owned land and buildings necessary to provide optimum wireless coverage. Workshops collaboration is key to dissemination of information and provides Municipalities with guidelines for moving forward on developing their SCADA system.

In this presentation, we will present several key issues and drivers required to developing the SCADA communications master plan:

1. RTUs (Remote Terminal Units) for more robust and reliable communications;
2. Leveraging SCADA for more effective Operations;
3. Redundancies in the SCADA system;
4. Better security, both physical and cyber;
5. Business integration;
6. Developing a security management plan and policy;
7. Risk management;
8. Radio channel efficiencies and redundancies;
9. Best practices; and
10. Future integration with other technologies.

Does your Municipality have SCADA communications master plan in place?

 pdf icon Presentation PDF


 

3.6 Side-stream and main stream deammonification for efficient nitrogen removal

Presented By: Sahar Fatemeh Kosari, Associated Engineering.
Time: Monday, 4:45 - 5:15 PM

Wastewater treatment technology is improving toward more sustainable and cost effective methods. The nitrogen topic is receiving considerable attention since partial nitritation (PN) and anaerobic ammonia oxidation (anammox), jointly called deammoniafication, can provide a 63% savings in oxygen consumption relative to conventional nitrification pathways.

This presentation first discusses an operational strategy for side-stream (e.g. centrate) nitrogen removal in a two-stage, deammonification system developed at the University of British Columbia. The operation of a PN sequencing batch reactor (SBR) under higher dissolved oxygen in combination with slow feeding resulted in a significantly reduced hydraulic retention time (HRT) without nitrate accumulation. Partially nitrified centrate was further treated in anammox reactors, where the mixture of ammonia and nitrite was converted mainly to nitrogen gas. The study illustrated that in the anammox reactor the best ammonium removal was achieved when the nitrite to ammonium ratio was between 1.35 and 1.45.

Building on this technical basis the presentation next discusses the concept of mainstream deammonification (MSD). MSD is an emerging technology that can potentially be implemented in a municipal setting for nitrogen removal to provide substantial savings in aeration-related energy and external carbon costs. Key items addressed include some of the technical challenges in applying deammoniafication for mainstream wastewater treatment and the current state of technology development.

 pdf icon Presentation PDF


 

8.1 Waste activated sludge fermentation: New kid in the EBPR block

Presented by: Dr. Lalith Liyanage, Associated Engineering.
Time: Tuesday, 8:00 - 8:30 AM

The reliability of Enhanced Biological Phosphorous Removal (EBPR) process and the rate and the stability of the denitrification process are improved by the availability of an easily biodegradable carbon source, commonly represented by volatile fatty acids (VFA). Primary sludge (PS) fermentation to produce VFA has been a common practice where VFA supplementation from an external source is required. In addition to providing an economical source of VFA, PS fermentation also provided sludge thickening as an additional benefit. Previously, waste Activated Sludge (WAS) fermentation was not considered beneficial to produce VFA due to the phosphorous and ammonia release from the biomass during fermentation. However, WAS fermentation is emerging as a new technology due to its many potential benefits such as cost-effective reduction of mass of WAS for digestion and the use of WAS fermenter supernatant as a source of VFA for the EBPR process. Other potential benefits of WAS fermentation include facilitation of side-stream phosphorous recovery and significant enhancement of dewaterability of digested sludge.

This paper describes the current understanding of this emerging technology. A comparison will be made between the WAS and PS fermentation with respect to design parameters, operational parameters, pilot and full-scale experiences. Possible WAS fermentation configurations and the demonstrated benefits of WAS fermentation will be discussed.

 pdf icon Presentation PDF


 

8.2 Using peracetic acid as a disinfectant at Metro Vancouver's northwest Langley wastewater treatment plant

Presented By: Brian Martin, Metro Vancouver.
Time: Tuesday, 8:30 - 9:00 AM

Regulatory agencies in general are implementing more stringent requirements where chlorine is used as a disinfectant and encouraging treatment plants to consider alternative disinfection methods. Peracetic acid has successfully been used as a wastewater disinfectant in Europe and various plants in North America have also piloted its use. Of the North American plants, only Florida's St. Augustine Wastewater Treatment Plant has continued full scale with peracetic acid after their pilot.

Metro Vancouver's Northwest Langley Wastewater Treatment Plant is a 12 MLD secondary plant, which has traditionally used sodium hypochlorite and sodium bisulfite for disinfection. The plant is currently in the midst of a pilot using peracetic acid as the primary disinfectant. The uniqueness of Northwest Langley's pilot is that it is a long-term multi-year full-scale pilot. Although the pilot is still in progress, the results are very encouraging and consistent with results from the pilots of other plants.

Due to its extensive history and widespread use, the byproducts of chlorine disinfection are well documented. In contrast, studies have shown that the byproducts of disinfection using peracetic acid are much less intrusive. Despite this, in addition to regulatory parameters, Metro Vancouver is working with the Ministry of Environment to study some potential receiving environment effects of using peracetic acid.

Within the Canadian and British Columbian regulatory framework, the use of peracetic acid is showing promise as an alternate disinfectant for Metro Vancouver's Northwest Langley Wastewater Treatment Plant.

pdf icon Presentation PDF


 

8.3 Waste Water Heat Recovery at the Gateway Theatre, City of Richmond BC 

Presented By: Michelle Maynard, Associated Engineering.
Time: Tuesday, 9:00 - 9:30 AM

The Gateway Theatre is a cultural hub for the City of Richmond.  As part of their ongoing sustainability initiatives, the City kicked-off a project to reduce energy consumption in the theatre heating system.  Building on previous energy use assessments and options analysis reports, the City chose to install an innovative wastewater heat recovery (WWHR) plant at the site.  The Gateway Theatre is uniquely suited to pilot this type of technology since it sits over an existing wastewater transfer station. 

The challenges with a WWHR system are in the handling of the wastewater stream.  High solids contents in the wastewater require bullet-proof design of the solids removal and filtration to ensure heat transfer equipment remains unplugged and effective.  The City chose to trial a new type of filter system provided by International Wastewater Systems.  This self-cleaning filter processes the wastewater stream to remove all solids.  The cleaned up wastewater is then passed through a heat exchanger, providing energy to the building internal heating loop.

The building has been retrofitted with a WWHR system that will provide the base load heating needs for the theatre.  The existing gas boiler will be retained to provide supplemental heat during periods of high demand.  The system is currently being commissioned and operation will be closely monitored to determine the energy harvested and ensure the most advantageous integration with the current building heating systems.  Should the pilot scale demonstrate the anticipated energy savings its capacity will be expanded to further reduce the carbon footprint of the Gateway Theatre.  This presentation will describe the energy potential of wastewater, give an overview of the project and present the energy savings from the installation.

 pdf icon Presentation PDF


 

8.4 AMI successes and challenges

Presented By: Brent Schmitt, City of Abbotsford.
Time: Tuesday, 9:30 - 10:00 AM

In 2007, water demand in the City of Abbotsford was nearing system capacity. In advance of development of new water supply, the City undertook various conservation initiatives, most notably the installation of an Advanced Metering Infrastructure (AMI) system. The AMI system was put into operation in 2011 and has had a significant impact on water usage and monitoring capabilities. Numerous initiatives and benefits have been achieved with the system, including ongoing automated leak detection, more frequent billing, increased customer awareness of usage, improved data for conducting audits, and near real-time modeling of system demands. Future initiatives may include implementation of seasonal or tiered water rates, development of more efficient conservation programs, and more precise monitoring of non-revenue water. Since commissioning the AMI system, the City has sent out thousands of leak notices to customers and has realized a substantial decrease in average day and maximum day demands, allowing for deferral of system expansion. Although there have been various challenges involved with development of the AMI system, many benefits have been realized and other advantages are yet to come.

pdf icon Presentation PDF


 

8.5 To get an innovative project, you need an innovative RFP process – The new Sechelt WWTP

Presented By: Andrew Ambrozy, Maple Reinders Inc.
Time: Tuesday, 10:20 – 10:50 AM

The District of Sechelt, wanted to build a new WWTP. But Sechelt wanted more than just a new plant, it wanted a state of the art, innovative plant, with tertiary treatment to reuse water quality standards. The available sites were both in residential areas, so the plant would also have be noiseless, odourless, energy efficient, and aesthetically pleasing. In short, something the town can be proud to put on display, not hide away.

The first step was to innovate on the tendering process itself. It was decided that the best way to proceed was using a Design-Build project delivery. The RFP issued by the District put the maximum creativity in the hands of the proponents while maintaining strict treatment and operational performance criteria.

Based on the RFP, the treatment system had to be very compact, energy efficient, noiseless, odourless, and fit into the surrounding residential neighbourhoods. Maple Reinders Inc. partnered with Urban Systems Ltd and Veolia, who had just such systems in Europe.

The Organica "Fed Batch Reactor" is a unique enhancement to SBR treatment, that uses living plants suspended above the reactors. The roots of the plants hang in the water, creating a submerged attached growth medium, and much greater biodiversity of microflora. The tanks and plants are enclosed in a glass greenhouse, which gives the appearance of a conservatory while also controlling odours.

The Design Build team had found an innovative system that met all the intents of the RFP, and could win a competitive bid.

pdf icon Presentation PDF


 

8.6 Use and validation of three-dimensional computational fluid dynamics in the design of weirs and spillways

Presented By: Dr. Ian Bowman, Hatch Mott MacDonald.
Time: Tuesday, 10:50 - 11:20 AM

The design of weirs and spillways associated with reservoirs and other water storage facilities involves assessment of complex fluid behaviours. Traditionally, such structures have been designed with a mixture of empirical data and physical experimental scale models. However, empirical data is not necessarily applicable to all designs, while testing of scale models is time-consuming, costly, and offers limited ability to investigate design alternatives.

The advent of affordable three-dimensional computational fluid dynamics (CFD) techniques and tools offers numerous potential benefits in the design of such facilities. CFD allows the design to be analysed at full-scale. Costs can be significantly less than with experimental techniques and turnaround time is dramatically reduced. CFD additionally allows quick and inexpensive study of design alternatives, offering value engineering options that would be difficult to achieve with a physical model. Lastly, CFD gives a complete picture of the flow field, allowing greater understanding of the specific flow behavior and thus offering scope for more intelligent design optimization.

This paper presents a CFD study for the upgrade of an existing reservoir weir and spillway with comparison with experimental results. Weir discharge coefficient and wave wall height are assessed and compared with the experiment, with good agreement between the two techniques being observed. An extensive set of results are presented and discussed, and recommendations are made for future best practice in the use of CFD for this problem.

pdf icon Presentation PDF


 

8.7 WWTP bio-refineries – Innovation paving the road from NIMB to pride

Presented By: Christian Cabral, Veolia Water Solutions & Technologies Canada Inc.
Time: Tuesday, 11:20 - 11:50 AM

The new municipal infrastructure revolution is about how to do more with less. Nowadays, municipalities, when building or upgrading their wastewater treatment plants, look for innovative solutions leading to sustainable projects incorporating: minimal carbon footprint, energy efficiency, nutrient recovery, biofuels, automation, education centers, and even greenhouses. These features are placing new wastewater treatment plants (WWTP) in the front stage on urban development and avoiding the Not In My Backyard (NIMB) syndrome. The presentation will show case studies featuring new trends in modern design: architectural features, footprint, energy efficient process trains, smart automation, product recovery, residuals reduction, etc. The result is a collection of pictures, technological developments, optimization programs, and new performance indicators applied to several European plants over the last 40 years. The presentation will stress "not to miss" aspects of decision making when it comes to public perception and circular economy in this new sustainable landscape.

 pdf icon Presentation PDF


 



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