SANITARY WASTEWATER COLLECTION SYSTEM TREATMENT PLANT ODOURS ULTRAVIOLET

SANITARY WASTEWATER COLLECTION SYSTEM & TREATMENT PLANT ODOURS ULTRAVIOLET (UV) BASED ODOUR CONTROL TECHNOLOGY INSTALLATIONS & PERFORMANCES Presented by: Bernie Lambert, Vice President of Sol-Air Systems Inc. (250) 763 -7034 Tom Spenceley, President of Corr Science Inc. (403) 204 -2096 Presented for the: 19 th Annual GPAC Operations & Maintenance Conference and Trade Show The material in this paper reflects the author’s best judgment, in the light of the information available to him, at the time of preparation. Any use which a third party makes of this paper, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. The author accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions taken based on this paper

PRESENTATION OUTLINE ü ü Introduction Odour Control Technology Ultraviolet Based Odour Control Technology Sol-Air Systems • • Installations & Investigations Findings

INTRODUCTION… n n Anaerobic or septic sanitary wastewater emits unpleasant odours – caused by hydrogen sulphide (H 2 S) , and other more complex, volatile reduced sulphur and nitrogen compounds such as mercaptans and amines. H 2 S is a toxic, flammable and corrosive gas. Septic wastewater odour produces a poor working environment Odour nuisance can quickly lead to public negative response

…INTRODUCTION The presence of H 2 S creates an unsafe working environment: Recognition threshold 0. 0047 ppm Borderline concentration for eye irritation 10 -20 ppm Eye damage 50 -100 ppm Paralyzed olfactory nerve, losing sense of smell 150 -250 ppm Pulmonary edema with the possibility of death 320 -530 ppm Strong stimulation of the central nervous system and rapid breathing, leading to loss of breathing 530 -1000 ppm Lethal concentration for 50% of humans (LC 50) for 5 minutes exposition 800 ppm Immediate collapse with loss of breathing > 1000 ppm

ODOUR CONTROL TECHNOLOGY Two main categories: Liquid Phase Control Methods Prevention e. g. Gas Phase Control Methods n Oxygen addition Mitigation n Chemical addition n Microbial supplementation e. g. n Activated carbon n Sediment control adsorption n Control of mass transfer n Liquid scrubbing n Biofiltration n Iron filtration n Control of ventilation

ODOUR CONTROL TECHNOLOGY Ultraviolet (UV) based technology → Gas Phase Control Method 48 UV lamp Sol-Air unit (C 48 LF) By: Sol -Air Systems Inc. , Kelowna , BC

SOL -AIR UV ODOUR CONTROL TECHNOLOGY Banks of UV lamps housed in a Marine Grade Aluminium housing n Odorous air is drawn in to make contact with the UV radiation and discharged with the use of an internally housed fan n OR Atmospheric air is drawn into make contact with the UV radiation and discharged into the contaminated space The UV wavelength frequency of the Sol-Air UV lamps can destruct a wide range of odourous compounds, such as Hydrogen Sulphide (H 2 S) and Mercaptans. n n

SOL -AIR UV ODOUR CONTROL TECHNOLOGY n n n UV Radiation catalyses the breaking of ambient oxygen and water vapour molecules into O+ and OH- radicals. These free radicals oxidize the odourous contaminants in the air. This reaction results in a sequential and instantaneous gas breakdown of the contaminants with minimal byproducts, such as elemental sulfur, CO 2, water vapour, molecular oxygen and trace ozone.

SOL -AIR UV ODOUR CONTROL TECHNOLOGY Sol-Air C 48 XLF Unit ü CSA approved ü Explosion proof (Class I, Division 2) ü Suitable for installation in confined spaces or hazardous areas as defined by the Canadian Electrical Code.

INSTALLATIONS Rooftop Installation on a Trickling Filter (2006) Trickling Filter Installation (circa 2001)

INSTALLATIONS Sanitary Lift Station Installation

INVESTIGATIONS Methodology: Contacting and interviewing the personnel responsible for the selection and ‘hands on’ operation and maintenance of the existing Sol-Air Systems. 1. 2. 3. 4. 5. Community of Field Tertiary MBR WWTP, BC City of Vernon WW Collection System and WWTP, BC CRD North Saanich Penninsula WWTP, BC City Of Kamloops WW Collection System and WWTP, BC North Juarez WWTP Odour Control Project, Mexico

TOWNSITE OF FIELD TERTIARY MBR WWTP APPLICATION: • • Odours from covered MBR/Activated Sludge process Odours from the Headworks / Screening room n These foul odours are all collected in ducts and exhausted into a small sealed odour control room. n The Sol-Air equipment is located in this odour control room, where the foul odours are treated by the n Sol-Air UV technology. n The treated, decontaminated air is then exhausted through a gravity damper to the outside environment.

CITY OF VERNON WW COLLECTION SYSTEM and WWTP APPLICATION: To provide treatment for various areas of the WWTP producing strong odours and H 2 S emissions; headworks, covered primary clarifiers, solids handling facilities etc.

CRD NORTH SAANICH PENNINSULA WWTP APPLICATION: n Pretreatment of foul air from all sources of strong odours and H 2 S emissions in the WWTP; Headworks; Primary Clarifiers; Solids Handling etc. n Sol-Air equipment treated air being ducted to an Activated Carbon Odour Control / Scrubber System n The Sol-Air equipment has increased the Activated Carbon Media life by a factor of 4 n Media cost prior to introducing the Sol-Air system were reported to be unsustainable

CITY OF KAMLOOPS WW COLLECTION SYSTEM APPLICATION: n Treatment of the foul air in a large submersible lift station wet well on the collection system. n The station is close to a condo development whose residents were seriously impacted by the foul odors and H 2 S emissions from the station, prior to the introduction of the Sol-Air treatment.

NORTH JUAREZ WWTP ODOUR CONTROL PROJECT, MEXICO Hydrogen Sulphide Emission Control by: APPLIED ENVIRONMENTAL SERVICES INC. El Paso, Texas APPLICATION: Treatment of various sources of foul air and H 2 S emissions from within the WWTP; Archimedes influent screw pumps; channels; headworks; primary clarifiers etc.

FINDINGS All existing installations reported that: n Sol-Air equipment was effective in treating the foul air and H 2 S gas emissions n Sol-Air units were performing to meet the operator and owner’s requirements, mitigating and successfully addressing the odour complaints from the public received prior to or in the absence of the Sol-Air equipment being in operation. n Effectiveness was rated from “satisfactory” to “very effective”. n Total Juarez project was approved and paid for by the US Environmental Protection Agency

ON SITE TESTING n Benchmark test at Vernon WWTF n To test the effectiveness of Sol-Air technology to destroy H 2 S n Equipment: • C 16 unit with 6” ducting • RAE systems Qrae+ toxic gas detector with O 2 and H 2 S sensor

ON SITE TESTING n H 2 S Concentration readings from gas detector n Airflow = 250 cfm n UV lamps are OFF from t = 0 to 430

ON SITE TESTING n At t = ~400, a large concentration of H 2 S is observed, due to activity in a lift station. n At t = 430, UV lamps are switched off and on at intermittent intervals Detailed view of t = 400 to 700 from previous graph Conclusion: H 2 S is destroyed by Sol-Air technology.

O&M n The O&M labour requirements were characterized as “minimal” at each location listed above. n Operation involves turning on the number of UV lamps one requires and setting the speed of the equipment fan to achieve the desired air flow through the UV banks. n A Sol-Air unit fitted with an intake filter requires regular cleaning of the filter. The UV lamps need to be kept clean using a soft cloth and a 50/50 alcohol and water solution in a spray bottle. Sol-Air’s proprietary lamps should be changed after 9, 000 hours of use or 1 year after lamp installation.

TECHNICAL SPECIFICATIONS (SOL-AIR C 48 XLF) LAMPS CONTROL HEAD AIR MOVEMENT • • 48 UV lamps 48 electronic ballasts 48 quartz sleeves 9, 000 hours life • Variable output configuration • Quartz hour meter • Optional 1, 000 cfm fan with variable speed control CONSTRUCTION • Marine-Grade Aluminium DIMENSIONS • 24”(W) x 57. 5”(L) x 42. 75” (H)

TECHNICAL SPECIFICATIONS (SOL-AIR C 48 XLF) WEIGHT UNIT COOLING WIRING • 462 lbs (210 kgs) • Forced air electrical cooling system (3 fans) • CSA certified: Class I, Div 2 • Moisture proof • 120 V/30 A or 240 V/15 A POWER CONSUMPTION • 58. 75 A (Max) on 120 V power WARRANTY • 1 year from delivery supply

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