South Red Deer Regional Wastewater System
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CANADIAN CONSULTING ENGINEERING AWARDS 2016 South Red Deer Regional Project Name Goes Here Wastewater System RoomOlds to Red for Deer, Multi-line Alberta Title Submitting Group: Stantec Consulting Ltd. Client’s Name ProjectClient: Location South Red Deer Regional Wastewater Commission Category: Water Resources Submitting Group: Stantec Consulting Ltd. | Prime Consultant: Stantec Con- sulting Ltd. | Architect: Stantec Architecture Ltd. | Contractors: Contractor A, Contractor B, Contractor C | Sub-consultants: Sub-Consultant A, Sub-Consultant B, Sub-Consultant C, Sub-Consultant D, Sub-Consultant E, Sub-Consultant F.... April 2016 Background of Completed Project Eight years ago, the South Red Deer Regional Wastewater • A triple barrel siphon under the Red Deer River Commission (SRDRWC) and Stantec started designing a • Ensuring the City of Red Deer wastewater plant system that would impact communities for years to come. could accept the wastewater from them SRDRWS by By linking these Central Alberta communities — Olds, completing extensive upgrades Bowden, Innisfail, Penhold, Mountain View County, and Red Deer County — to the City of Red Deer’s Wastewater Following 15 years of concepts, studies, consultations, Treatment facility, this 90 km regional line alleviates design / construction phases, and testing, the SRDRWS the pressure faced by these communities and their went online in the summer of 2015. With the system overloaded treatment systems. now operational, wastewater from each of the six communities is being treated to higher standards at the Project Overview City of Red Deer Wastewater Treatment Plant (CRD WWTP). This treatment will help protect the aquatic The sheer length of the South Red Deer Regional environment and the quality of the source water for Wastewater System (SRDRWS) posed a huge design much of Central Alberta. challenge on its own, never mind the fact that construction occurred in a highly populated corridor, and The successful completion of the SRDRWS can now crossed several environmentally sensitive areas. Each be used as a model for the north and west legs of the government body – municipal, provincial and federal – Central Alberta Regional Wastewater System. But most had individual requirements that had to be met. The final importantly, the system will ultimately help to protect product: a unique and highly sophisticated system. one of our valuable natural resources, while supporting growth in the region for years to come. Designed for a 25-year horizon, the $140-million SRDRWS will allow the communities along it to grow “The South Red Deer Regional Wastewater System at a steady rate for years to come through a number of is an exemplary model of building a regional complex systems including: wastewater system through partnership and • Four major wastewater lift stations equipped with technical excellence,” said the judges of the 2016 odour treatment Consulting Engineers of Alberta. • Approximately 90 km of forcemain with an outside diameter ranging from 550 mm to 850 mm In February 2016, the SRDRWS received the 2016 CEA • Alberta’s first dual-media Odour Management Facility Award of Excellence for Water Resource and Energy Production. The system was also recognized by the • Stantec-designed, state-of-the-art operation and American Public Works Association - Alberta Chapter monitoring system with a user friendly interface for - with the Project of the Year Award for Environment, operators the Association of Professional Engineers and • A pipeline alignment that would minimize the impact Geoscientists of Alberta 2016 Project Achievement on the environment (wetlands, wildlife, plants) and Summit Award, and the America Public Works extensive environmental monitoring for the impacted Association SC/RC Public Works Project of the Year areas in the Environment category. Ground-breaking ceremony Grand-Opening Ceremony - October 2015 2016 CCEA: South Red Deer Regional Wastewater System Stantec - 1 - H City of G Triple Barrel Site view of the Odour Management Facility Red Deer )" Siphon Town of ¯ WWTP « Sylvan Lake Odour TMWaP nRDa 3g84ement 11 City of Facility 11 TS7T81 Red Deer TWP RD 382 2 T TS5T96 Existing Waskasoo Alignment TS5T95 G asoline Alley G )" TWP RD 374 TS7T81 Pumps at the Penhold Regional Lift Station Springbrook with an ultimate capacity of 540 L/s 2A 2 Existing Waskasoo Lift Stations G )" G TWP RD 372 Penhold to OMF 2A Length: 27 km G 2 Pipe OD: 800mm - )" 850mm HDPE T TS592 TS5T92 )" 42 Penhold G Lift Town of Penhold Station Future Red Deer r e County Connection v 2 i TWP RD 364 R r Innisfail To Penhold e e Length: 28 km 7T81 D TS 2A Pipe OD: 700mm HDPE d 54 e TWP RD 362 R 2 7 2 D R E G N A R TWP RD 360 Innisfail Lift Town of Innisfail Station 54 TS5T90 TS5T90 Bowden To Innisfail )"*# Length: 15 km G Pipe OD: 550mm Installation of 550 mm HDPE DR 15.5 Pipeline TWP RD 352 ST7T91 TWP RD 350 2 Bowden TS5T87 TS5T87 TWP RD 344 Lift Town of Bow Station )" den *#G TS5T87 Bowden To Olds R e d D e e r C o u n t y Length: 20 km Pipe OD: 550mm HDPE T TWP RD 340 M oOuldsn Retgaionianl Li ft VStaitieonw C d i e w C o u n t y x m d x m . 3 _ t r o p 6 3 x 4 2 _ t n e 3 5 m 0 8 5 8 n 0 4 g 1 2 i 1 l 2 2 1 A e D r D i D D D t D n R R e R R R R \ e s Legend E E E E u E E o G G H G G G G n N e 2A 2 N N N N p Olds N Cascading Lift Station O A A )" A A A _ A n R R n R R R R I o 7T91 T Lift TS s d l )" Existing Lift Station O r o f \ Station D X M \ w *# Septage Receiving Station e i v c r )"*# A \ H e n i l G SRDRWC Alignment e p i P \ n Town of Olds g i s Future Mountain View e Waskasoo Regional Sewer System D _ t 27 e D _ Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS User Community County Connection n s e g g n S i pri r Completed By: SJS ngbrook e w b a r n Project No.: 113928100 e D Date: Oct 5, 2015 - e t b s 5 s 0 : \ r n e g i s s U e d _ l M i A a t SRDRWC Facilities Overview 0 e 3 d : _ 7 C 5 : 8 W R 5 1 D 0 R 2 / S 7 _ / 0 0 0 1 South Red Deer Regional 1 : 8 e t 2 a 9 3 D 1 e 1 v \ : a Wastewater Commission S U 2016 CCEA: South Red Deer Regional Wastewater System Stantec - 2 - Innovation The South Red Deer Regional Wastewater System removing 90% of the total odours before being released required innovative approaches and leading edge to the atmosphere. By treating the vapour, removing technology to manage the long pumping distances and the H2S and preventing odours at the sites, the working high variability in wastewater retention times, which can conditions for the operators was greatly improved and range from 1.5 to 4 days across the length of the system. life of the facilities was extended. The lift stations also have a chemical injection system, which adds a bioxide Odour Management chemical (Nitrate) into the wastewater. This reduces the generation of H2S in the pipeline keeping it entrained Due to the 90 km length of the system, the long retention in the wastewater until it reaches the OMF, where it is time of the wastewater creates a high potential for odour stripped off. generation and gases – specifically H2S - to be released wherever the system vents to atmosphere, especially The forcemain pipe contains a number of combination under dry weather conditions. This was a critical concern air vacuum valves that automatically release air as for the operations at the CRD WWTP, where gases could required. As the air is released from the forcemain, it harm the Biological Nutrient Removal process and be creates an odour potential, which is forced through an hazardous to operator health and equipment. inorganic media. This process ensures the H2S and odour are removed prior to it being released to atmosphere. Odour Management Facility A state-of-the-art Odour Management Facility (OMF) Pipeline Features was designed to ensure that the high levels of H2S The SRDRWS includes approximately 90 km of generated do not negatively affect the CRD WWTP and forcemain pipelines – all of which was constructed with its operations, or cause safety concerns for the operators. jointless pipe, making it the longest regional wastewater The OMF includes treatment for both vapour and liquid system in Alberta. Fused high-density polyethylene phase odours, which happens in a number of steps (see (HDPE), a corrosion proof material, was selected. A diagram below for more detail). common material for pressurized forcemains, the fused HDPE eliminates the use of gasketed joints, greatly 1. First, the raw wastewater enters the stripping reducing the possibility of leakage and provides a more chamber of the OMF through pressure sustaining robust system. valves. Hydraulic Modelling 2. Next, using coarse bubble diffusers, the stripping A hydraulic model of the system optimized the pump chamber removes the dissolved sulfides and other and piping sizes. The analysis determined that the pipe odourous compounds from the solution by adding sizes ranged from 550 mm outer diameter on the Olds dissolved oxygen into the wastewater prior to mixing to Innisfail leg, up to 850 mm outer diameter section on with wastewater from the City of Red Deer.