The South Surrey Interceptor is an extensive piping system that collects and conveys approximately 500 million litres of wastewater daily from municipalities in the eastern area of Metro Vancouver to the Annacis Island Wastewater Treatment Plant located in the City of Delta, British Columbia.
Challenge
In recent years, there have been odour issues related to the South Surrey Interceptor due to population growth and neighborhood density. Metro Vancouver is taking steps to address these odour issues by constructing air management facilities to treat and reduce odour along the pipe route. The air management facilities will also reduce corrosion and extend the service life of the sewer system while also lowering maintenance costs.
Solution
At the Delta Air Management Facility, Evoqua will provide two BTF-Bioscrubber Biological Odour Control Systems, a custom-designed activated carbon scrubber, and ancillary components. The dual-stage system can achieve greater than 99.9% hydrogen sulfide removal while also treating broad-spectrum odours. The activated carbon scrubber will utilize Evoqua’s Midas® OCM high-capacity media, which will provide additional air polishing and redundancy during maintenance events.
Evoqua’s BTF Bioscrubber Biological odour control system is an advanced, non-hazardous biological air treatment system which integrates equipment, media, and the NUCIRC process for optimal performance and flexibility. The NUCIRC process allows operation in recirculation and/or once-through modes to deliver accelerated acclimation that is ideal for odour control and hydrogen sulfide removal.
During the single-stage mode, a recirculation pump continuously circulates the sump liquid over the media beds. In dual-stage mode, the recirculation pump continuously circulates the irrigation over the lower beds (first stage), while a smaller stream of makeup water is intermittently sprayed over the top bed (second stage). This dual-stage process results in the growth of an extremely robust and efficient biomass to achieve very high odour removal capabilities. This process responds more quickly to variations in odour inlet concentrations versus the more common single pass, intermittent irrigation technology available in the industry. The BTF-Bioscrubber biological odour control system can also be operated in intermittent mode for low hydrogen sulfide broad spectrum odour applications.
Evoqua’s biological odour control treatment technologies are proven solutions that will provide the Metro Vancouver region with extremely high odour removal efficiency without the use of hazardous chemicals “
Results
Professional services from Jacobs has supported Metro Vancouver from the beginning of the project and is working closely with Evoqua to finalize the engineering work. The commissioning of the project is expected to occur in mid-2023.
Over the past two decades, Evoqua Water Technologies has been a leader in the development of biological vapor phase odour control technologies and has over three decades of experience providing chemical and dry media odour control scrubbing systems. Evoqua currently has over 2000 vapor phase odour control installations in 45+ countries and is also one of North America’s preeminent liquid phase odour control solution’s provider. Our team of odour control experts can help support municipalities and industrial treatment facilities with optimum odour control solutions to meet the most challenging requirements.