Township of Southgate Dundalk Wastewater Treatment Plant 2017 Annual Report Staff Report PW2018-010 - Dundalk Wastewater Treatment Plant 2017 Annual Report Moved by Councillor Pallister, Seconded by Councillor Frew; Be it resolved that Council receive Staff Report PW2018-010 for information; and That Council approve the Dundalk Wastewater Treatment Plant 2017 Annual Report. Carried. No. 2018-078 Jim Ellis Public Works Manager
Dundalk Wastewater Treatment Plant 2017 Annual Report Table of Contents Wastewater Treatment Plant Annual Overview..1 2017 General Wastewater Information. 4 Loading Report.. 5 Performance Report.. 6 Final Effluent Discharge Report 7 Raw Sewage Parameters and Lab Results. 8 Final Effluent Parameters and Lab Results. 9
Overview: The Dundalk Wastewater Treatment Plant (WWTP) provided treatment in 2017 with all effluent concentrations limits being met on an annual average. The annual average influent daily flow was 1168 m³/day. Project Description: The Dundalk WWTP is a four cell waste stabilization pond facility flowing into an aeration cell pond with a chemical feed system and a flocculation tank with tertiary treatment consisting of sand filters. Plant Facts: Facilities: Design Capacity: Receiver Water: Environmental Compliance Approval: Effluent Requirements: Sampling Requirements: Waste Stabilization Ponds with Tertiary Treatment 1832 m³/day Foley Drain/Grand River 5657-9D9LYE CBOD SS DO T.Phos. when temperature >5 C T.Phos. when temperature <5 C Unionized Ammonia mg/l 10 mg/l 10 mg/l 4 mg/l 0.4 mg/l 0.8 mg/l 0.1 mg/l Sampling criteria for this system is in accordance with Ministry policy and the Environmental Compliance Approval (ECA) Final Effluent: A grab sample is taken twice a month and tested for CBOD, Suspended Solids, Total Phosphorus, Total Ammonia Nitrogen, Ecoli, ph and temperature. On site testing is performed twice a week on final effluent for Total Ammonia to determine Unionized Ammonia through lab testing, ph, temperature and Dissolved Oxygen. Raw Sewage: A grab sample is taken monthly and tested for BOD, Suspended Solids, Total Kjeldahl Nitrogen and Total Phosphorus. Effluent Flows: The total effluent flow treated in 2017 was 420,598 m³. The annual average daily flow was 1230 m³/day, which results in a 25.67% increase of total effluent over 2016. Raw Sewage Quality: Annual average raw sewage BOD concentration to the lagoon system was 113.5 mg/l. Annual average raw sewage suspended solids (TSS) concentration to the lagoon system was 160.6 mg/l. 1
Annual average raw total phosphorus was 2.98 mg/l concentration to the lagoon system. Annual average Total Kjeldahl Nitrogen (TKN) concentration was 28.1 mg/l. Plant Performance and Effluent Quality: The Influent annual flow in 2017 has increased 17.94% over 2016 flows. Annual average effluent CBOD concentration was 5.3 mg/l. Annual average effluent total suspended solids (TSS) concentration was 3.4 mg/l day with a removal efficiency of 97.57% with an annual monthly average loading of 5.0 kg/day. Annual average effluent total phosphorus concentration was 0.07 mg/l day with a removal efficiency of 97.13% with an annual monthly average loading of 0.1 kg/day. Annual average effluent concentration for Ammonia-nitrogen was 1.72 mg/l. Annual average Unionized Ammonia was 0.016295 mg/l. Annual average ph was 8.12. Annual monthly average Ecoli was 34 with the low being 2 and the high being 260. The summary for 2017 of the data for the systems plant operation performance is enclosed in this report. Maintenance and Calibration Activities: Regular monthly preventative maintenance and calibration of test equipment and flow meters are performed by municipal staff and outside certified suppliers. In January 2017 5931 m3 effluent discharge flow was added to reflect the average from January 21 to 24, 2017 due to a breaker needing reset. Third party annual calibrations were performed on November 23, 2017. There were no by-pass events to report. There were 5 operator shutdowns in 2017: Filter building for effluent shut down on March 20, 2017 due to Un-Ionized ammonia > 0.1 mg/l. Started back up March 21, 2017, Un-Ionized ammonia < 0.1 mg/l. Filter building for effluent shut down on March 30, 2017 due to Un-Ionized ammonia >0.1mg/L. Started back up on March 31, 2017, Un-Ionized ammonia <0.1mg/L. Filter building for effluent shut down April 3, 2017 due to Un-Ionized ammonia > 0.1 mg/l. Started back up on April 4, 2017, Un-Ionized ammonia < 0.1mg/L. Filter building for effluent shut down April 5, 2017 due to Un-Ionized ammonia > 0.1 mg/l. Started back up on April 6, 2017, un-ionized ammonia < 0.1mg/L. Filter building for effluent shut down April 11, 2017 due to Total Suspended Solids >10 mg/l. The plant re-started April 28, 2017, Total Suspended Solids < 10 mg/l. 2
Discussion: An environmental assessment was initiated for the Dundalk Sewage Works, to determine methods and expansion to meet future development needs. The Bishop Water Technologies Bio Cord pilot project continued in 2017. At the request of Bishop, the reactors were moved from Cell #4 to Cell #2 in August 2017 to identify if Cell #2 provides better analysis and results compared to Cell #4 the winter before. Through the Wastewater Optimization program involving Grand River Conservation Authority and funding from the Ministry of Environment and Climate Change, the Draw the Graph Funding Opportunity was submitted by Southgate to conduct a flow meter verification study for a 4 month period and was accepted. An area-velocity flowmeter (Raven-eye) was installed by ACG Technologies upstream of the Parshall flume on June 7, 2017 to help verify and validate the existing Parshall flume influent flowmeter at the Dundalk lagoons. Some of the conclusions are, both flowrates follow similar trends, the Raven-eye generally shows slightly higher flowrates, for both flowrates peaks occur with precipitation events. The daily average of the Raven-eye flowrates in the analysis period measured 5% higher flows than the Southgate flowrate. A special study was conducted in the summer of 2017 to verify the flow reported by both the Raven-eye flow meter and the Parshall Flume by filling the raw influent wet well in a known period of time. The draw & fill method produced flow rates consistently higher than the Parshall flume. The draw & fill method produces higher flows than the Raven-eye in June and July (based on 10 minute interval data), however those flows are in line with each other when the Raven-eye flows are based on 1 minute interval data. The Parshall flume flows are in line the with the 10 minute interval Raven-eye data in June and July and the Raven-eye flows based on the one minute interval data in August are higher than the reported Parshall flume flows for that period. The Raven-eye flow meter was able to capture peak instantaneous flows to the plant (e.g. captured a high flow event due to rainfall on June 23, 2017, whereas the Parshall flume totalizer did not). The results of these studies would appear that the flume and the Raven-eye are close for average day flow so they may each be over or under estimating in the high and low flow ranges but come out to the same average day flow over the test period. The data collected during this short study, while limited, will be shared with the consultant undertaking the EA. The more frequent flow monitoring may provide some useful information on peak instantaneous and peak hourly flows to the plant, which are important for sizing future infrastructure such as pumps. A continuous influent flow meter can provide useful data such as peak day, peak hourly and instantaneous flows and better technology may be implemented in the future. 3
Township of Southgate - Village of Dundalk 2017 General Wastewater Information Plant # : 0-101006-67 ECA # : 5657-9D9LYE Population: 1703 (Village of Dundalk) Flows Design 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 Capacity: 208,500 - - - - - Influent Average Daily: - m3 1,168 986 728 996 2,221 1,183 1,164 1,020 1,217 1,482 Annual Influent Flow: 668,600 m3 424,727 360,118 265,878 364,601 808,274 434,232 425,447 372,117 444,350 542,455 Influent Maximum Daily: - m3 6,362 4,820 2,458 2,873 3,991 3,926 4,453 4,390 4,258 4,577 Effluent Average Daily: 1,832 m3 1,230 1,090 1,181 1,636 1,394 1,136 1,332 1,245 1,466 1,631 Annual Effluent Flow: - m3 420,598 334,685 389,776 494,185 505,962 369,351 435,622 434,339 535,214 597,173 % Discharge vs. Total Capacity: - 62.9% 50.1% 58.3% 73.9% 75.7% 55.2% 65.2% 65.0% 80.0% 89.3% Influent Increase 2017 over 2016: - 17.94% 35.44% -27.08% -54.89% 86.14% 2.06% 14.33% -16.26% -18.09% 35.54% Effluent Increase 2017 over 2016: - 25.67% -14.13% -21.13% -2.33% 36.99% -15.21% 0.30% -18.85% -10.38% 62.28% 4
Township of Southgate Loading Report - Dundalk Wastewater Plant Municipality: Township of Southgate Year: 2017 Plant: Dundalk Wastewater Treatment Lagoons & Collection System Plant # : 0-101006-67 Works # : 110001471 System Description : Faculative Lagoons & Sand Filters Loading Influent Effluent Loading Effluent Effluent Effluent BOD SS T Phos. CBOD SS T Phos. Month kg/day kg/day kg/day kg/day kg/day kg/day January 101.7 132.2 3.2 5.6 3.7 0.1 February 270.7 294.4 4.2 7.6 4.8 0.2 March 141.7 201.4 3.6 15.5 13.1 0.1 April 67.5 233.6 3.7 16.5 20.0 0.2 May 94.1 200.6 1.4 4.3 4.3 0.1 June 121.6 116.7 3.0 3.3 4.1 0.1 July 44.4 114.7 1.5 1.8 1.4 0.1 August 80.5 148.5 1.9 1.3 1.0 0.0 September 66.6 101.8 2.3 0.4 0.4 0.0 October 162.4 198.4 4.7 0.5 0.8 0.0 November 182.2 179.7 4.0 2.6 3.2 0.1 December 102.1 113.1 2.7 3.8 3.1 0.0 Total 1435.5 2035.1 36.3 63.1 60.1 1.1 Average 119.6 169.6 3.0 5.3 5.0 0.1 Maximum 270.7 294.4 4.7 16.5 20.0 0.2 5
Municipality: Township of Southgate Plant: Dundalk Wastewater Treatment Lagoons & Collection System Year: 2017 Plant # : 0-101006-67 Receiver: Foley Drain - Grand River Works # : 110001471 Design Average Day Flow (m3): 1832 System Description : Faculative Lagoons & Sand Filters January 52530 1695 3080 57566 31 60.0 3.0 95.00% 78.0 2.0 97.44% 1.90 0.08 95.79% 260 7.5 16.8 2.90 0.013947 5.6 3.7 0.1 February 50879 1817 5754 53463 28 149.0 4.0 97.32% 162.0 2.5 98.46% 2.30 0.09 96.09% 122 0.5 21.5 8.60 0.028056 7.6 4.8 0.2 March 46249 1492 4296 46377 30 95.0 10.0 89.47% 135.0 8.5 93.70% 2.40 0.07 97.08% 5 1.9 23.0 6.20 0.065161 15.5 13.1 0.1 April 54758 1825 3227 16499 8 37.0 8.0 78.38% 128.0 9.7 92.42% 2.00 0.08 96.00% 2 7.2 21.2 2.03 0.068874 16.5 20.0 0.2 May 55039 1775 6362 67133 31 53.0 2.0 96.23% 113.0 2.0 98.23% 0.80 0.05 93.75% 2 12.6 5.6 0.10 0.001647 4.3 4.3 0.1 June 21196 707 1325 49773 30 172.0 2.0 98.84% 165.0 2.5 98.48% 4.30 0.08 98.14% 2 19.7 42.5 0.10 0.008321 3.3 4.1 0.1 July 21169 683 1502 21921 31 65.0 2.5 96.15% 168.0 2.0 98.81% 2.20 0.10 95.45% 5 22.3 20.6 0.10 0.003844 1.8 1.4 0.1 August 16201 523 685 15833 31 154.0 2.5 98.38% 284.0 2.0 99.30% 3.70 0.09 97.57% 2 21.0 40.8 0.10 0.002178 1.3 1.0 0.0 September 16486 550 694 6423 30 121.0 2.0 98.35% 185.0 2.0 98.92% 4.20 0.06 98.57% 2 19.4 38.9 0.15 0.001575 0.4 0.4 0.0 October 26630 859 1433 8188 31 189.0 2.0 98.94% 231.0 3.0 98.70% 5.50 0.04 99.27% 2 13.4 46.6 0.20 0.001426 0.5 0.8 0.0 November 37438 1248 1853 38516 30 146.0 2.0 98.63% 144.0 2.5 98.26% 3.20 0.04 98.75% 2 3.3 29.5 0.10 0.000211 2.6 3.2 0.1 December 26152 844 1665 38906 31 121.0 3.0 97.52% 134.0 2.5 98.13% 3.20 0.03 99.06% 2 0.5 30.1 0.10 0.000300 3.8 3.1 0.0 Average 35394 1168 35050 113.5 3.6 95.27% 160.6 3.4 97.57% 2.98 0.07 97.13% 34 10.8 28.1 1.72 0.016295 5.3 5.0 0.1 Maximum 55039 1825 6362 67133 189.0 10.0 284.0 9.7 5.50 0.10 260 22.3 46.6 8.60 0.068874 16.5 20.0 0.2 Township of Southgate Performance Report - Dundalk Wastewater Plant Flows Discharge Bio-Chemical Oxygen Demand Suspended Solids Phosphorus E Coli Temperature Nitrogen Series Loading Raw Effluent Duration Avg. Raw Avg Effluent Percent Avg. Raw Avg. Effluent Percent Avg. Raw Avg. Effluent Percent average < 5 C. TKN Avg. Effluent Unionized Effluent Effluent Effluent Total Flow Avg. Flow Max. Flow Total Flow BOD CBOD Removal SS SS Removal T. Phos T. Phos Removal Effluent or NH3 + NH4 Ammonia CBOD SS T Phos. Month m3 m3 m3 m3 Days mg/l mg/l mg/l mg/l mg/l mg/l Count > 5 C. mg/l mg/l mg/l kg/day kg/day kg/day Total 424727 420598 342.0 6
Township of Southgate Annual Report - Dundalk Wastewater Plant Plant: Dundalk Wastewater Treatment Lagoons & Collection System Works: 110001471 Year: 2017 Location Type: Final Effluent Discharge Report Discharge Total Total Average Average Average Average Average E Coli Average Average Average Duration Effluent Coagulant Coagulant CBOD SS T. Phos. NH3 + NH4 average ph Temp. D.O. Month Days m3 Used (kg) Dosage (mg/l) mg/l mg/l mg/l as N (mg/l) Count Lab Reports C mg/l January 31 57566 1.55 17.5 3.0 2.0 0.08 2.90 260 8.11 7.50 13.83 February 28 53463 1.40 17.0 4.0 2.5 0.09 8.60 122 7.88 0.50 12.70 March 30 46377 1.50 21.0 10.0 8.5 0.07 6.20 5 8.16 1.90 11.96 April 8 16499 0.40 15.8 8.0 9.7 0.08 2.03 2 8.06 7.20 9.57 May 31 67133 1.55 15.0 2.0 2.0 0.05 0.10 2 8.22 12.60 9.17 June 30 49773 1.50 19.6 2.0 2.5 0.08 0.10 2 9.20 19.70 6.92 July 31 21921 1.55 46.0 2.5 2.0 0.10 0.10 5 8.51 22.30 6.24 August 31 15833 1.55 63.6 2.5 2.0 0.09 0.10 2 7.85 21.00 7.27 September 30 6423 1.50 151.8 2.0 2.0 0.06 0.15 2 7.77 19.40 6.93 October 31 8188 1.55 123.0 2.0 3.0 0.04 0.20 2 7.36 13.40 9.53 November 30 38516 1.50 25.3 2.0 2.5 0.04 0.10 2 8.15 3.30 14.72 December 31 38906 1.55 25.9 3.0 2.5 0.03 0.10 2 8.22 0.50 14.14 Total 342 420598 17.10 Average 35050 1.43 45.13 3.58 3.43 0.07 1.72 34 8.12 10.78 10.25 Maximum 67133 10 9.7 0.1 8.6 260 9.20 22.30 14.72 7
Township of Southgate - Village of Dundalk Annual Report - Dundalk Wastewater Plant Plant: Dundalk Wastewater Treatment Lagoons & Collection System Year: 2017 Works: 110001471 Population Served: 1703 Classification: Class 1 Wastewater Collection & Class 1 Wastewater Treatment Receiver Foley Drain to Grand River Raw Sewage Parameters January February March April May June July August September October November December Summary Average 60 149 95 37 53 172 65 154 121 189 146 121 114 BOD Minimum 60 149 95 37 53 172 65 154 121 189 146 121 114 mg/l Maximum 60 149 95 37 53 172 65 154 121 189 146 121 114 Suspended Average 78 162 135 128 113 165 168 284 185 231 144 134 161 Solids Minimum 78 162 135 128 113 165 168 284 185 231 144 134 161 mg/l Maximum 78 162 135 128 113 165 168 284 185 231 144 134 161 Average 16.8 21.5 23 21.2 5.6 42.5 20.6 40.8 38.9 46.6 29.5 30.1 28.1 TKN Minimum 16.8 21.5 23.0 21.2 5.6 42.5 20.6 40.8 38.9 46.6 29.5 30.1 28.1 mg/l Maximum 16.8 21.5 23.0 21.2 5.6 42.5 20.6 40.8 38.9 46.6 29.5 30.1 28.1 Total Average 1.9 2.34 2.38 2 0.82 4.30 2.20 3.70 4.20 5.50 3.20 3.20 2.98 Phosphorus Minimum 1.90 2.34 2.38 2.00 0.82 4.30 2.20 3.70 4.20 5.50 3.20 3.20 2.98 mg/l Maximum 1.90 2.34 2.38 2.00 0.82 4.30 2.20 3.70 4.20 5.50 3.20 3.20 2.98 8
Plant: Dundalk Wastewater Treatment Lagoons & Collection System Year: 2017 Works: 110001471 Population Served: 1703 Classification: Class 1 Wastewater Collection & Class 1 Wastewater Treatment Receiver Foley Drain to Grand River Final Effluent Parameters January February March April May June July August September October November December Summary Average 3.0 4.0 10.0 7.5 2.0 2.0 2.5 2.5 2.0 2.0 2.0 3.0 3.5 CBOD Minimum 2.0 4.0 5.0 6.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 mg/l Maximum 4.0 4.0 15.0 9.0 2.0 2.0 3.0 3.0 2.0 2.0 2.0 4.0 15.0 Suspended Average 2.0 2.5 8.5 8.5 2.0 2.5 2.0 2.0 2.0 3.0 2.5 2.5 3.3 Solids Minimum 2.0 2.0 6.0 5.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 mg/l Maximum 2.0 3.0 11.0 12.0 2.0 3.0 2.0 2.0 2.0 4.0 3.0 3.0 12.0 Average 2.9 8.6 6.2 1.9 0.1 0.1 0.1 0.1 0.2 0.2 0.1 0.1 1.71 NH3 + NH4 Minimum 0.70 8.10 5.20 0.50 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 mg/l Maximum 5.10 9.10 7.20 3.20 0.10 0.10 0.10 0.10 0.20 0.30 0.10 0.10 9.10 Average 3.75 9.50 6.85 2.95 0.55 0.55 0.60 0.70 0.75 0.80 0.65 0.70 2.36 TKN Minimum 1.40 9.00 5.90 1.40 0.50 0.50 0.60 0.70 0.60 0.70 0.60 0.60 0.50 mg/l Maximum 6.10 10.00 7.80 4.50 0.60 0.60 0.60 0.70 0.90 0.90 0.70 0.80 10.00 Total Average 0.08 0.10 0.07 0.08 0.05 0.08 0.10 0.09 0.06 0.04 0.04 0.03 0.07 Phosphorus Minimum 0.06 0.09 0.05 0.06 0.03 0.06 0.09 0.08 0.05 0.03 0.04 0.03 0.03 mg/l Maximum 0.09 0.10 0.09 0.10 0.06 0.10 0.11 0.10 0.06 0.05 0.04 0.03 0.11 Average 260.00 122.00 5.00 2.00 2.00 2.00 5.00 2.00 2.00 2.00 2.00 2.00 34 Ecoli Minimum 2 70 2 2 2 2 2 2 2 2 2 2 2 Maximum 518 174 8 2 2 2 8 2 2 2 2 2 518 Average 8.11 7.88 8.16 7.99 8.22 9.20 8.51 7.85 7.77 7.36 8.15 8.22 8.12 ph Minimum 7.90 7.82 8.14 7.77 8.00 9.11 8.32 7.58 7.51 7.15 7.78 8.18 7.15 Maximum 8.31 7.94 8.18 8.21 8.43 9.29 8.69 8.11 8.02 7.56 8.52 8.25 9.29 Average 13.75 12.20 11.95 9.20 9.45 6.70 6.85 7.30 7.10 9.60 14.55 13.80 10.20 DO Minimum 12.90 10.80 10.00 6.50 7.60 5.00 5.40 6.50 5.90 7.20 12.60 13.10 5.00 mg/l Maximum 14.60 13.60 13.90 11.90 11.30 8.40 8.30 8.10 8.30 12.00 16.50 14.50 16.50 Unionized Average 0.016294 0.030156 0.085673 0.083842 0.002338 0.013545 0.005950 0.004950 0.001750 0.003520 0.000300 0.000150 0.020706 Ammonia Minimum 0.006189 0.014267 0.021664 0.014856 0.000000 0.000000 0.000400 0.000500 0.000400 0.000040 0.000000 0.000000 0.000000 mg/l Maximum 0.026398 0.046046 0.149681 0.152827 0.004676 0.027090 0.011500 0.009400 0.003100 0.007000 0.000600 0.000300 0.152827 Township of Southgate - Village of Dundalk Annual Report - Dundalk Wastewater Plant 9