Collingwood Wastewater Treatment Plant 2016 Annual Compliance Report

Transcription

1 Collingwood Wastewater Treatment Plant 2016 Annual Compliance Report

2 Table of Contents Definitions...2 Wastewater System General Information...3 Executive Summary...4 Section 1.0 The Facility...5 Section 2.0 Annual Average Performance Evaluation Effluent Quality Assessment Effluent Sampling Requirements Monitoring & Reporting Capacity Assessment...9 Section 3.0 Biosolids Management...9 Section 4.0 Bypass Occurrences Section 5.0 Maintenance Section 6.0 Complaints Section 7.0 Other Projects WWTP Expansion/Upgrade Cogeneration/ Odour Control EPS OXI-G Unit Installation Capital Improvement Projects Appendix A WWTP Sampling Program Appendix B Monthly Flow and Process Quality Data Monthly Final Effluent Flows Monthly Average Concentration Final Effluent CBOD WWTP Final Effluent Total Phosphorous Monthly Average Concentration Final Effluent TSS Appendix C Sludge Management Overview Appendix D Bypass and Spills Report Wastewater Treatment Annual Report

3 Definitions BOD CBOD 5 Cfu C of A COD DO ECA Hg FP HP Kg kw mg/l Ml/d m 3 /d NH 3 NO 2 NO 3 SPS STF SVI TBOD TKN TP TS TSS UV VFA VS WWTP Biochemical Oxygen Demand Carbonaceous Biochemical Oxygen Demand Colony Forming Units Ministry of the Environment Certificate of Approval Chemical Oxygen Demand Dissolved Oxygen Environmental Compliance Approval Mercury Filtered Phosphorous Horsepower Kilograms Kilowatt Milligrams per litre Mega litres per day Cubic metres per day Ammonia Nitrites Nitrates Sewage Pump Station Sewage Transfer Station Sludge Volume Index Total Biochemical Oxygen Demand Total Kjeldahl Nitrogen Total Phosphorous Total Solids Total Suspended Solids Ultraviolet Volatile Fatty Acids Volatile Solids Wastewater Treatment Plant Wastewater Treatment Annual Report

4 Wastewater System General Information This annual report has been presented and approved by the Town of Collingwood Council. A notice has been placed in local newspapers notifying the public and any interested authority that the Collingwood Wastewater System s 2016 Annual Compliance Report can be viewed on the website shown below or upon request, a copy will be made available free of charge. The Wastewater System 2016 Annual Report can be viewed and downloaded in PDF format from the following website: Wastewater System Name Collingwood Wastewater Treatment Plant Wastewater Works Number Wastewater System Owner Wastewater System Category Town of Collingwood Class III Certification Period being Reported January 1, 2016 to December 31, 2016 Plant Certificate of Approval & Amendments: The Plant operates under the Certificate of Approval Number TLQB2 dated the 17 th day of December Wastewater Treatment Annual Report

5 Executive Summary This report has been compiled in accordance with the reporting requirements of the Certificate of Approval (C of A) TLQB2, Condition 10 (6). The report is broken down into sections for simplicity. Additional information may be contained in each section over and above that which is required to support and substantiate the required content. If further clarification is required please contact: Mr. Glenn Price, Manager of Wastewater Treatment Ext Wastewater Treatment Annual Report

6 Section 1.0 The Facility The Collingwood WWTP, owned and operated by the Town of Collingwood, is a conventional activated sludge plant with alum addition for phosphorus removal. Treated effluent from the plant is discharged to Collingwood Harbour, which is situated in Georgian Bay on the south shore of Nottawasaga Bay. The plant is located at the northern limit of Birch Street in Collingwood. The plant was first constructed in 1958 to provide primary treatment of the Town's domestic and industrial wastewater. The primary plant was expanded in Secondary treatment was added in The rated flow capacity is 24,548 m 3 /day with a peak flow rate of 60,900 m 3 /day. Wastewater from the serviced area flows to the plant by gravity, although seven (7) pumping stations at Minnesota Street, St. Clair Street, Paterson Street, Cranberry Trail, Black Ash Creek, Pretty River Estates and Silver Glen boost the flow throughout the area. Major unit operations at the Collingwood WWTP include the following: Headworks - provides the following preliminary process treatments: o Emergency plant bypass o Automated mechanical raked raw sewage screen o Manual raked bypass raw sewage screen o Raw sewage pumping station o Grit removal o Bio scrubber for headwork s odour control o Septic/leachate handling Primary Sedimentation Activated Sludge with Alum addition for Phosphorus Removal Secondary Clarification Disinfection with UV Effluent discharge to Collingwood Harbour Thickening of waste activated sludge by Dissolved Air Flotation Anaerobic Sludge Digestion Liquid Digested Sludge Land Utilization Disposal Sludge Storage Lagoon (off site) Standby power source (diesel driven generator) Wastewater Treatment Annual Report

7 Section 2.0 Annual Average Performance Evaluation 2.1 Effluent Quality Assessment 1. Effluent Objectives - Condition 6 (1) of the C of A states the requirements for effluent objective quality. The Owner shall use best efforts to operate the treatment system within these effluent limits. The effluent objective concentrations are summarized below in Table 1. Effluent Parameter Table 1-Effluent Objectives Concentration Objectives (milligrams per litre unless otherwise indicated) CBOD Total Suspended Solids 15.0 Total Phosphorus 0.8 E.Coli Monthly Geometric Mean Density 100 organisms per 100ml ph of the effluent maintained between 6.5 to 9.5, inclusive, at all times 2. Effluent Limits - For the purposes of determining compliance with and enforcing concentrations and readings in Table 2, see Condition 7(2) of C of A. Effluent Compliance limits are what the system must achieve. Effluent Parameter Table 2-Effluent Limits Average Concentration (milligrams per litre unless otherwise indicated) Average Waste Loading (kilograms per day unless otherwise indicated) CBOD Total Suspended Solids Total Phosphorus ph of the effluent maintained between 6.0 to 9.5, inclusive, at all times a. The Annual Average Concentration of Carbonaceous Biochemical Oxygen Demand (CBOD 5 ) and Total Suspended Solids named in Column 1 of Table 2 shall not exceed the corresponding maximum concentration set out in Column 2 of Table 2. b. The Monthly Average Concentration of Total Phosphorus named in Column 1 of Table 2 shall not exceed the corresponding maximum concentration set out in Column 2 of Table 2. c. The Annual Average Loading of a parameter named in Column 1 of Table 2 shall not exceed the corresponding maximum waste loading set out in Column 3 of Table 2. d. The ph of the effluent shall be maintained within the limits outlined in Table 2 at all times. Wastewater Treatment Annual Report

8 e. Notwithstanding Condition 7(1), the Owner shall operate and maintain the works such that the effluent is continuously disinfected so that the monthly Geometric Mean Density of E.coli does not exceed 200 organisms per 100 millilitres of effluent discharged from the works. f. Only those monitoring results collected during the corresponding time period shall be used in calculating the Annual Average Concentration/Monthly Average Concentration/Annual Average Loading for this Certificate. Monitoring results for 2016 are summarized in Appendix B. A summary of compliance is listed below: The annual average effluent concentrations for CBOD 5, and TP fell within the applicable objectives. The monthly average effluent concentrations for TP fell within the applicable objective. The annual average effluent concentrations for CBOD 5, and TSS fell within the applicable compliance limit. The monthly average effluent concentration for TP fell within the applicable compliance limit. The annual average effluent loadings for CBOD 5, TSS, and TP, all fell within the applicable compliance limits. The ph values have fallen within the 6.0 to 9.5 range permitted under the certificate. The monthly geometric mean densities of E-Coli bacteria in the final effluent met the compliance criteria for all months. The monthly geometric mean densities of E-Coli bacteria in the final effluent met the objective criteria for all months except January. 2.2 Effluent Sampling Requirements Monitoring & Reporting 1.0 Compliance Testing and Analysis Monitoring requirements are specified under Condition 9 (3) of the C of A. Twenty-four (24) hour composite samples of raw sewage are required to be collected quarterly and analyzed for CBOD 5, TSS, TP and TKN. Twenty four (24) hour composite samples of final effluent are required to be collected monthly and analyzed for CBOD 5, TSS. Twenty four (24) hour composite samples of final effluent are required to be collected weekly and analyzed for TP and total ammonia nitrogen. Grab samples of final effluent are required to be collected weekly for analysis for E-Coli bacteria. Lastly, the temperature and ph of the final effluent is required to be tested three times each week. The plant s current regular monitoring program exceeds these minimum requirements. Compliance sampling and analysis of raw sewage is carried out quarterly. Twenty four (24) hour composite samples are collected using an automatic sampler for analysis of CBOD 5, TSS, TP and TKN. Compliance sampling and analysis of final effluent is carried out weekly. Twenty four (24) hour composite samples are collected using a refrigerated automatic sampler for analysis of CBOD 5, TSS, TP, and TKN, total ammonia nitrogen, nitrite and nitrate. Grab samples of final effluent are also collected weekly for analysis of E.Coli bacteria. Lastly, grab samples are collected daily (Monday to Friday) and tested for ph and temperature. With the exception of the samples collected for ph and temperature testing, analysis for all compliance samples is carried out by our external contract laboratory, ALS Environmental Laboratory, in Waterloo, Ontario. Wastewater Treatment Annual Report

9 The plant also complies with Guideline F-10-1 concerning sampling and analysis requirements which satisfies Condition 9 (4) (a). The temperature and ph of the final effluent is taken in the field at the time of sampling for Total Ammonia Nitrogen so as we can calculate the concentration of un-ionized ammonia as set out in Condition 9 (5). The Collingwood WWTP external sampling program is attached as Appendix A WWTP Sampling Program. All external laboratory analysis results are reported in the R1 and R2 Municipal Utility Monitoring forms which are submitted electronically to the Barrie District Office and are used in generating the annual plant performance report. 2.0 In-House Testing and Analysis for Process Control Twenty four (24) hour composite samples are collected Monday through Friday on influent, primary effluent and final effluent. Grab samples are also obtained for other process streams as required for process control purposes. All samples are analyzed on-site using standard method techniques or using approved methods for HACH DR/2010 Spectrophotometer. The Collingwood WWTP internal sampling program is attached as Appendix A WWTP Sampling Program. Samples are analyzed using procedures from the most current edition of Standard Methods or HACH DR/2010 spectrophotometer methods. The time and day of the samples is determined by the Laboratory Technician so as to equalize the workload while maintaining representative operations data. The Technician is responsible for obtaining proper and sufficient samples through co-ordination with the process operators. 3.0 Flow Measurement Flows at the Collingwood WWTP are continuously measured at the raw sewage pumps and at the final effluent weir. Raw sewage flows are monitored by ultrasonic flow measuring devices on pumps 1 and 3 and an electromagnetic device (magmeter) on pump 2. All devices are installed on the discharge side of the pumps. Final effluent flows are continuously monitored by means of rectangular weir with an ultrasonic flow monitor. A 24-hour chart recorder records the final effluent flow. Both the influent and final effluent flows are trended through the SCADA system. The meters are calibrated annually for accuracy (must be +/- 15%of flow rate) to satisfy Condition 9 (7) of the C of A. June 1, 2016 Date Equipment Calibrated/Maintenance Influent X 3, Raw Sludge Flow, Sludge Loading, TWAS and Final Effluent Company Performing Calibration/ Maintenance V. Nowik Instrumentation and Controls Wastewater Treatment Annual Report

10 2.3 Capacity Assessment The Certificate of Approval specifies that the plant is rated to treat an average daily flow of 24,548 m 3 /d and a peak flow of 60,900 m 3 /d. Design Current Year ADF in m 3 /d 24,548 16,879 Maximum daily flow in m 3 /d 60,900 60,310* The annual average daily flow has fallen within these limits for this reporting period. *The peak single day max daily design flow was exceeded; approximately 50,000m 3 was bypassed during an extreme weather event in addition to the max daily design flow that went through the plant. The annual average performance data is summarized in Appendix B. Section 3.0 Biosolids Management The WWTP currently stabilizes its biosolids (sludge) through anaerobic digestion comprised of two (2) primary digesters, each with a capacity of 1,223m 3, one (1) secondary digester for separation of digested sludge and collection and storage of gas, with a capacity of 1,223m 3 and one (1) sludge holding tank with continuous air supply and a capacity of 990m 3. A waste gas burner with a rated capacity of 560m 3 /hr is connected to the system. Stabilized biosolids are spread on licensed agricultural land as a nutrient and soil conditioner. Sludge produced at the Collingwood WWTP meets the quality criteria specified in the Ontario Guidelines for Sewage Sludge Utilization on Agricultural Lands. Sludge is applied in accordance with these guidelines and the conditions set out in the site Certificate of Approvals. Sludge disposal through direct utilization on land is not practical during winter months, during periods of inclement weather and when agricultural fields are inaccessible. The provincial guidelines for biosolids utilization on land recommends municipalities provide 6 months sludge storage facilities. The Town of Collingwood currently owns & operates a 5,000 m 3 STF located on Part Lot 48, Concession 12 in the Town of Collingwood and contracts two 6,800 m 3 STF from Region of Huronia Environmental Services Ltd. to achieve this guideline. Sludge disposal operations are currently contracted to a private hauler, Region of Huronia Environmental Services Limited, R. R. #1, New Lowell, Ontario, L0M 1N0 A total volume of 26,303.4m 3 of biosolids was disposed of from the Collingwood facility in Samples of anaerobic sludge are collected twice monthly and sent for metals, E.coli, and nutrient analysis to ALS Environmental, Waterloo, Ontario, N2V 2C5. Appendix C provides a detailed summary report of sites utilized for sludge disposal in Original reporting analysis is available at the plant for viewing. Wastewater Treatment Annual Report

11 Section 4.0 Bypass Occurrences There was one bypass occurrence during this reporting period on March 28, 2016 due to an extreme weather event. Flow to the plant went beyond the peak capacity of 60,900 m 3 /d. This was due to extreme weather condition which saw a high amount of snow melt and rain water reach the WWTP. Approximately 50,000 m 3 was bypassed directly to Georgian Bay. The WWTP ORO contacted the Ministry of Environment and Climate Change, Spills Action and the Ministry of Health as required and provided a detailed summary of the event. A summary of the event is attached as Appendix D. Section 5.0 Maintenance A record log is kept for each piece of equipment at the Collingwood WWTP. These logs are available for inspection at the plant. In 2016, we continued with the Continuous Service Program performed by Ainsworth Electric Co. Limited. This program utilizes such tools as thermography, voltage, load and harmonic checks, vibrations analysis etc. and has been designed using predictive and preventative maintenance to increase safety, reduce down time, reduce maintenance costs, protect asset value and extend equipment life. Regarding electrical inspections, the WWTP and seven pumping stations are being reviewed under the Electrical Safety Authority. The associated logbook at the site is available for review. All boiler and pressure vessels were inspected by personnel from the Boiler Inspection and Insurance Company of Canada. Signs of small leakage in the heat exchanger were noted and a full boiler re-tube was performed. The boiler was placed back into service with minimal downtime with no effect on plant performance. All primary and secondary clarifiers were taken out of service for inspection and repairs implemented as required (e.g. damaged flights replaced, drive chains changed, etc.). UV lamps on the disinfection system were changed out before the 5000 hour limit. Yearly inspection/maintenance was performed by Toromont CAT on standby power equipment at the main plant and all pumping stations. Gas monitoring equipment was calibrated and serviced as original equipment manufacturer s recommendation. Section 6.0 Complaints The report below outlines each complaint received in The documented versions of these complaints are held at the Collingwood WWTP and are available for review on request. Wastewater Treatment Annual Report

12 Date Complaint Action/Observations November 14, 2016 Complainant said waste gas burner was out. Upon arriving at plant, burner was going. Called complainant and advised that equipment was running. Section 7.0 Other Projects WWTP Expansion/Upgrade Conestoga Rovers and Associates (CRA) (now operating as GHD Canada) completed a Class Environmental Assessment (Class EA) related to the next expansion phase for the Collingwood Wastewater Treatment Plant in May The Class EA was initiated at a time when treatment flows were close to 80% of the WWTP average day capacity. The Class EA selected a preferred expansion concept that included maintaining the current conventional activated sludge treatment process, and an expansion utilizing compact secondary and tertiary technology with the ability for phased implementation. With the completion of infiltration/inflow improvements in the collection system and the loss of industry demands in the Town, current flows indicate an expansion is not required in the near future. In 2016, the WWTP ADF was operating at 69% of design ADF. Cogeneration/ Odour Control Following the completion of a feasibility study on economic and technical options for using the digester gas, the Town decided to move forward with the installation of a co-generation plant. A micro turbine will use digester gas to create electricity which will be fed back into the plant behind the hydro meter, reducing the amount of electricity needed at the WWTP. This project will reduce the carbon footprint of the WWTP and is a beneficial way to utilize digester gas that is produced from the treatment process. Included in the project is the installation of a cover over the primary clarifiers and the installation of a gas conditioning skid to treat gas released during the transfer of digested sludge. This combined project received approval in 2016 for Small Communities Funding, a funding partnership between the Government of Canada, the Province of Ontario and the Town of Collingwood. Construction of the co-generation and odour control systems commenced in July The project is expected to be commissioned by August EPS OXI-G Unit Installation The WWTP received a minimal amount of odour complaints in Odour control at the WWTP will be further improved in 2017 following the installation of an OXI-G unit in the headworks building. This revolutionary and proprietary unit will be installed in the headworks building and will operate in conjunction with the existing bioscrubber. This unit oxidizes chemicals in the gas stream, converting ambient air into pure ozone and hydroxide radicals. The unit will remove odours with a predicted 99% efficiency. The installation of this Canadian design in Collingwood will be the first full scale application of this product Capital Improvement Projects A number of improvement projects will be advanced in included in the 2017 budget: Feasibility study on the options for UV unit replacement. The following projects have been Wastewater Treatment Annual Report

13 Engineering design and commence construction of upgrades at the Black Ash Creek & Minnesota Sewage Pump Stations, as identified through the asset management plan. Purchase and installation of variable frequency drives on pump motors for increased efficiency. Completion of design specifications for the replacement of existing brick facades. Wastewater Treatment Annual Report

14 Appendix A WWTP Sampling Program Samples are analyzed using procedures from the most current edition of Standard Methods or HACH DR/2010 spectrophotometer methods. The time and day of the samples is determined by the Laboratory Technician so as to equalize the workload while maintaining representative operations data. The Technician is responsible for obtaining proper and sufficient samples through co-ordination with the process operators. COLLINGWOOD EXTERNAL SAMPLING PROGRAM Unit Process Type Sample Parameters Tested Frequency Raw Sewage Composite CBOD 5, TSS, TP, TKN Quarterly Primary Effluent Composite NH 3,TKN, VFA, NO 3, CBOD 5, Biweekly NO 2, Final Effluent Composite Grab NH 3, TKN, TP, NO 3, CBOD 5, SS, TBOD 5, NO 2, Bacti (E-coli) Weekly Weekly Biosolids Grab when truck TS, anions, ICP, Hg, TKN, TP, 2x/month (Anaerobic sludge) loaded VS & E-coli Influent 24 hr. composite ph, SS, TP, FP, Temperature, COD, BOD 5, Daily M-F WTF Primary Effluent 24 hr. composite SS, TP, FP, COD, BOD 5 Daily M-F W,Th,F Final Effluent 24 hr. composite ph, SS, TP, FP, Temperature. COD, NH 3, BOD 5, Daily M-F W,Th,F Aeration mixed liquor Grab Daily M-F return sludge Grab Grab - half hour settling - SS - Calculate SVI - DO (as required to check against on-line readings) SS Daily M-F Daily M-F (iii) waste activated SS sludge Thickening Grab TS, VS in thickened sludge 4 X/week Raw Sludge Grab TS, VS 4 X/week Digested Sludge Grab TS, VS Weekly Digester Supernatant Grab TS, VS, BOD 5, TP, alkalinity Volatile acids, ph As process requires Wastewater Treatment Annual Report

15 Appendix B Monthly Flow and Process Quality Data Plant Collingwood WWTP Region Central Effluent Objectives Municipality Town of Collingwood District Simcoe CBOD5 15mg/L Works Number Operating Authorit Municipal TSS 15mg/L Treatment Conventional Activated Sludge Watercourse Collingwood Harbour TP 0.8 mg/l Phosphorus Removal Minor Basin Huron E-Coli 100 organisms/ 100mL Design Capacity (1000 m3/d) Major Basin Great Lakes ph 6.5 to 9.0 Population Served Annual average Annual average Average 2016 Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec concentration Loading daily flow FLOWS (m3/d) Monthly ADF Month Total Max day Min day CBOD5 (mg/l) Compliance is Compliance is Influent mg/l kg/d Effluent Final Effluent Objective concentration is 15 mg/l SS(mg/L) Compliance is Compliance is Influent mg/l kg/d Effluent Final Effluent Objective concentration is 15 mg/l TP (mg/l) Compliance is Influent kg/d Effluent Monthly average concentration:objective is 0.8mg/L, compliance limit is1.0mg/l and an annual average loading of 24.5 kg/d TKN (mg/l) Influent Effluent TAN (mg/l) Influent Effluent ph of Final Effluent Min (6.0) Max (9.5) Compliance means maintaining the the ph of the final effluent within the limits 6.0 to 9.5(objective is 6.5 to 9.0) E-Coli Final effluent Monthly geometric mean density of E-Coli: objective is100organisms/100ml,compliance is 200 organisms /100mL Wastewater Treatment Annual Report

16 2016 Monthly Final Effluent Flows Town of Collingwood WWTP Monthly Average Final Effluent Flows m3/day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Design Daily m3/day Average Daily Wastewater Treatment Annual Report

17 2016 Monthly Average Concentration Final Effluent CBOD5 Town of Collingwood WWTP 2016 Monthly Average Concentration Final Effluent CBOD mg/l Compliance Annual Average 25mg/l 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Operating Objective 15mg/l CBOD5 mg/l Wastewater Treatment Annual Report

18 2016 WWTP Final Effluent Total Phosphorous Town of Collingwood WWTP Final Effluent Total Phosphorous mg/l 0.6 Compliance Annual Average 1.0mg/l Operating Objective 0.8mg/l Jan Feb Mar Apr Ma y Jun Jul Aug Sep Oct Nov Dec Total Phosphorous mg/l Wastewater Treatment Annual Report

19 2016 Monthly Average Concentration Final Effluent TSS Wastewater Treatment Annual Report

20 Appendix C Sludge Management Overview Contaminan Arsenic Cadmium Cobalt Chromium Copper Mercury Molybdenum Nickel Lead Selenium Zinc Ammonia Nitrate Nitrite Kjeldahl-N Phosphorus Potassium Total Solids E-Coli Volatile Solids Sampling As Cd Co Cr Cu Hg Mo Ni Pb Se Zn NH3 NO3 NO2 TKN TP K TS VS Date mg / L mg / L mg / L mg / L mg / L mg / L mg / L mg / L mg / L mg / L mg / L mg / L mg / L mg / L mg / L mg / L mg / L % cfu/g % 6-Jan Jan Feb Feb Mar Mar Mar Apr Apr May May Jun Jun Jul Jul Aug Aug Aug Sep Sep Oct Oct Nov Nov Dec Dec Wastewater Treatment Annual Report

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32 Appendix D Bypass and Spills Report The report below outlines any bypasses in The original document is held at the Collingwood WWTP and is available for review upon request. Pumping Station And Plant Bypass Monthly Summary Primary Bypass Secondary Bypass Month No. of days Duration Volume Duration Volume (hrs) (1,000 m 3 No. of days ) (hrs) (1,000 m 3 ) Jan 0 0 Feb 0 0 Mar ,000m3 0 Apr 0 0 May 0 0 Jun 0 0 Jul 0 0 Aug 0 0 Sep 0 0 Oct 0 0 Nov 0 0 Dec 0 0 Total ,000m3 0 All the information supplied within this document is correct and complete to the best of the authors knowledge. If further information is required please do not hesitate to contact the author: Mr. Glenn Price, Manager of Wastewater Treatment Ext gprice@collingwood.ca Wastewater Treatment Annual Report