BRACEBRIDGE WASTEWATER TREATMENT

Transcription

1 2014 BRACEBRIDGE WASTEWATER TREATMENT ENVIRONMENTAL COMPLIANCE APPROVAL: #6801-7VKNAQ

2 INTRODUCTION The Lagoon Lane Wastewater Treatment Plant is owned and operated by the District Municipality of Muskoka. The plant is located at 1000 Lagoon Lane in the Muskoka Township, Lot 8, Concession 13, now in the Town of Bracebridge serving a population of approximately 7,000 people. The treatment facility consists of 60 acres of facultative lagoons and a membrane filtration treatment plant. The first two lagoons were constructed in They were 23 acres in size. By 1976, additional capacity was required to meet the needs of the town. At that time, an additional 37 acres of lagoons were constructed bringing the total to 60 acres. In 1983, an extended aeration treatment plant was commissioned to provide additional capacity for the growing town. In 2011, a new membrane filtration (MBR) plant was constructed to replace the extended aeration facility. Sternpac is used as the coagulant and disinfection is by ultraviolet lights. The final effluent is discharged to the Muskoka River by way of a diffuser. The new plant was commissioned in November The new MBR plant has a treatment capacity of 8,000 cubic meters per day. Limit criteria for the MBR facility are as follows: Effluent Parameter CBOD Total Suspended Solids Total Phosphorous Total Ammonia Nitrogen Summer (May 15 to September 30) Winter (October 01 to May 14) E. Coli Concentration 10 mg/l 10 mg/l 0.4 mg/l 5.0 mg/l 10.0 mg/l 80 counts/100ml (Monthly Geometric Mean Density) Summary Interpretation Of Monitoring Data All sample results for Raw Sewage and Final Effluent are reported in this section. Other tables in this report include Chemical Usage, Biosolids Quality, and Biosolids Quantity. Raw Sewage The information reported in the Raw Sewage sample results summary table consists of test results of analysis conducted on composite samples of the plant influent flow as required by the plant ECA. Samples are sent for analysis to Lakefield Research, as well as analysis conducted on site using Standard Methods or equivalent. Weekly analysis has been performed and reported as specified under the terms outline in the ECA.

3 Interpretation Of Effluent Analysis The information reported in the Final Effluent sample results summary table #7 consists of test results of analysis conducted on final effluent composite samples. Bacteriological samples, however, consisted of grab samples. Weekly analysis has been performed and reported as specified under the terms outlined in the ECA. Final Effluent Analysis Summary Minimum 4 Week Maximum Annual Loading kg/day CBOD5 (mg/l) Suspended Solids (mg/l) Total Phosphorous (mg/l) Ammonia (mg/l) Not E. Coli (#/100 ml) Applicable Not Min 7.00 Max 8.21 ph Applicable All final effluent samples tested for CBOD5, suspended solids, ammonia, E. Coli, and total phosphorous were below non-compliance limits outlined in the ECA. Overall, the plant treatment processes performed satisfactorily and are deemed to be adequate. All sample test results of the final effluent were within levels outlined in the plant ECA #1308-8VPPZL. In all respects, test results of the treated effluent for the parameters of CBOD5, Suspended Solids, Ammonia, Total Phosphorous, and E. Coli are in compliance with the limits outlined in the Certificate of Approval regarding monthly allowable concentrations and total effluent loading throughout the entire year. Quantity Of Flow Summary The Lagoon Lane WWTP rated capacity is 8,000 m3/d with a peak flow rating of 18,000 m3/d. The Daily Flow did not exceed the rated capacity throughout the reporting period. The Daily Flow was 4,140 m3/day. The 3 year average is 3,641 m3/day which represents 45% of the new facilities capacity. The Max daily flow was 8,951 m3/day which was well below the 18,000 m3/d peak day flow rating. All final effluent sample results for the facility met their established effluent limits. In general, the Lagoon Lane WWTP operated well throughout the reporting period. The Operators strive to maintain and operate the facility such that the Effluent Objectives are not exceeded to ensure superior effluent quality.

4 Plant Operational Upsets Or Process Failures Foaming continues to be an issue at the inlet to the plant affecting the level readings prior to the screening process. A temporary spray system was been setup and has had limited success. We are currently considering using stilling wells around the level transducers to lessen this problem. Summary Of Plant Upgrades And Significant Maintenance Upgrades The staff performed routine preventative maintenance from work orders that were generated by the Antero maintenance software. Preventative Maintenance And Calibration Of Monitoring Equipment All monitoring equipment information at the Bracebridge Water Pollution Control Plant is entered into a computer database. From this information, a scheduled preventive maintenance programme has been established. All scheduled maintenance for 2015 will be generated using this method as well. The flow-measuring devices were calibrated in (Reports available upon request). Effluent Quality Assurance Measures In addition to the plant sampling and monitoring protocols required by the ECA, inhouse plant-wide sampling and analysis is also conducted. This in-house sampling program provide assurance that the various treatment processes continue to operate at a high performance level. Efforts And Results Towards Meeting Effluent Objectives A review of the District of Muskoka s infrastructure needs is conducted annually by the Director of Water and Sewer Operations, Area Manager and Chief Operator and recommendations for maintenance, rehabilitation and renewal programs are considered Efforts to eliminate the discharge of untreated or partially treated wastewater to receiving waters are being accomplished by a long term financial commitment to correct excessive infiltration into the wastewater collection system by means of sewer main rehabilitation / replacement, manhole rehabilitation and pumping station rehabilitation programmes. The treatment facility is capable of effective operation during emergencies, maintenance shut downs, and power failures. This is achieved through such measures as preventive maintenance of duty / standby units, the duplication of major treatment components, the provision of standby power sources and extensive use of the SCADA systems. All operators are qualified to operate the systems efficiently and effectively in order to achieve the highest level of treatment at all times; a commitment to provide Operator training and certification is being sustained.

5 Regulatory sampling is carried out to meet the requirements outlined in the ECA. Additional in house operational sampling beyond these regulatory requirements is being performed on a routine basis, These efforts have resulted in an effective treatment process which ensures that effluent discharges consistently meet effluent objectives and are environmentally safe. Biosolids Generation A total of 61,537 m3 of sludge was pumped from the Lagoon Lane WWTP to the Lagoon Cell #3. Sludge in the cell is allowed to break down further in a modified Sutton Process. Eventually sludge will need to be removed and disposed of. Appropriate disposal options will be reviewed at that time. It is not anticipated that there will be a significant increase in the total volume of biosolids produced in Treatment Unit Bypasses There were no bypasses or spills at the Lagoon Lane WWTP throughout the reporting period. Complaints There were no complaints received in 2014.

6 Certification of Reports I certify that the information in this document and all attachments are correct, accurate and complete to the best of my knowledge. Lee Gillan Acting Director of Water and Sewer Operations

7 2014 BRACEBRIDGE WASTEWATER COLLECTION SUMMARY New Sewer Mains During 2014, approximately 50m of new sewer main was installed on a new street called Little Ryan s Way. New Services In 2014, 12 new sanitary services were activated. Sanitary Lateral Blockages District staff was called to deal with 2 sanitary lateral blockages that required excavation and repairs by District staff at a cost of approximately $7, Sewer Pump Stations In 2014 we had five of our residential low pressure pumps stations completely replaced at a cost of approximately $50, Main Line Sewer Blockages We had one main line sewage blockages in Cost of repair was approximately $ Sewer Force Mains We had one small 2 force main that needed repair at a cost of $4, Sewer Flushing & Video Inspection In 2014 the District had 13,800 Meters of sanitary pipe flushed with high pressure equipment then CCTV inspected at an approximate cost of $20,000. This information is invaluable when it comes to discovering infiltration or exfiltration issues within our system. Manhole Rehabilitation We had 26 manholes rehabilitated in 2014 at an approximate cost of $130, Air Release Valves All of our Sewer Air Release Valves were inspected with 11 of them replaced with new stainless steel types at a cost of approximately $66, Locates Field staff addressed 631 locate requests in 2014.

8 TABLE 1: EFFLUENT FLOW SUMMARY District of Muskoka - Lagoon Lane WPCP - Bracebridge Month Plant Monthly Flow (m 3 ) Mechanical Plant Day Flow (m 3 /d) Maximum Day Flow (m 3 /d) Minimum Day Flow (m 3 /d) Lagoons Monthly Flow (m3) Facility Monthly Flow (m3) January 108,196 3,490 5,112 2, ,196 February 83,645 2,987 4,214 2, ,645 March 103,072 3,325 5,374 2, ,072 April 236,246 7,875 8,951 5,330 84, ,122 May 163,148 5,263 8,587 3, ,148 June 117,216 3,907 5,798 2, ,216 July 111,770 3,606 4,824 3, ,770 August 89,604 2,890 3,175 2, ,604 September 96,505 3,217 4,594 2, ,505 October 119,183 3,845 5,930 2, ,183 November 144,773 4,826 8,745 3, ,773 December 137,647 4,440 8,011 3, ,647 Comments Total 1,511,005 Day 4,140 Maximum Day 8,951 Minimum Day 2,385

9 District Municipality of Muskoka Lagoon Lane WPCP - Bracebridge Total Monthly Treated Discharges , , , ,000 M3 150, , ,000 50, ,196 83, , , , ,770 89,604 96, , , ,647 0 January February March April May June July Month August September October November December

10 District Municipality of Muskoka Lagoon Lane WPCP - Bracebridge Total Treated Discharges ,600,000 1,400,000 1,511,005 1,200,000 1,382,692 1,000,000 1,102,750 1,094,043 1,092,721 M3 800, , , , Year

11 District Municipality of Muskoka Lagoon Lane WPCP - Bracebridge Day Treated Discharges ,500 4,000 4,140 3,500 3,788 3,000 3,021 2,997 2,994 M3 2,500 2,000 1,500 1, Year

12 TABLE 3: INFLUENT QUARTERLY ANALYSIS SUMMARY District of Muskoka - Lagoon Lane WPCP - Bracebridge Sample Identification Number Weekly 24 Hour Composite Sample Alkalinity (Total as CaCO3) ph Phosphate Sample Date Total BOD5 Phosphorus mg/l mg/l mg/l mg/l mg/l 5-Feb-14 CA May-14 CA Aug-14 CA Nov-14 CA Yearly Maximum Minimum Suspended Solids Weekly 24 Hour Composite Sample Sample Date Total Kjeldahl Nitrate Nitrite Total Ammonia Conductivity Nitrogen Nitrogen Nitrogen Nitrogen Chloride mg/l mg/l mg/l mg/l mg/l mg/l 5-Feb May Aug Nov Yearly Maximum Minimum

13 TABLE 4: CHEMICAL USAGE SUMMARY District of Muskoka - Lagoon Lane WPCP - Bracebridge Dosage mg/l COAGULANT SODA ASH SODIUM HYPOCHLORITE CITRIC ACID Total Dosage Total Dosage Total Dosage Total kg mg/l kg mg/l kg mg/l kg Month January February March April May June July August September October November December Monthly Unit Cost (see note 1) Total Yearly

14 TABLE 7: EFFLUENT LOADING and CONCENTRATION SUMMARY District of Muskoka - Lagoon Lane WPCP - Bracebridge CBOD 5 SUSPENDED SOLIDS TOTAL AMMONIA NITROGEN TKN E-COLI TOTAL PHOSPHOROUS Summer (May 15 to Sep 30) Winter (Oct 01 to May 14) MONTH Maximum Maximum Maximum Maximum Maximum Geometric Maximum Maximum Day Day Day Day Day Mean Day Day mg/l kg/d kg/d mg/l kg/d kg/d mg/l kg/d kg/d mg/l kg/d kg/d mg/l kg/d kg/d #/100 ml #/100 ml mg/l kg/d kg/d January February March April May June July August September October November December Monthly Yearly Effluent Objective <2/100ml 0.30 Non- Compliance /100ml 0.40 Note: Bracketed and Bolded Values indicate non-compliance ( )

15 TABLE 9: LIQUID BIOSOLIDS PRODUCTION SUMMARY District of Muskoka - Lagoon Lane WPCP - Bracebridge No. Date Hauler Shipped To Received From Comments Location Volume M3 Location Volume 1 January Pumped Lagoon Cell February Pumped Lagoon Cell March Pumped Lagoon Cell April Pumped Lagoon Cell May Pumped Lagoon Cell June Pumped Lagoon Cell Baysville STP 75 7 July Pumped Lagoon Cell Baysville STP August Pumped Lagoon Cell Baysville STP September Pumped Lagoon Cell Baysville STP October Pumped Lagoon Cell Baysville STP November Pumped Lagoon Cell Baysville STP December Pumped Lagoon Cell Baysville STP 4 Yearly Total Yearly Maximum Minimum 61,537 5,128 5,787 4,051

16 TABLE 10: BIOSOLIDS QUALITY ANALYSIS District of Muskoka - Lagoon Lane WPCP - Bracebridge Quarterly Analysis Parameter Sampled 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Comments Date Feb May Aug Nov Nitrate mg/l 1 < Mercury mg/l <0.001 < < Chromium mg/l <0.1 Cobalt mg/l <0.05 <.01 <0.01 <0.01 <0.05 Copper mg/l Lead mg/l <0.1 <.1 <0.1 <0.1 <0.1 Molybdenum mg/l <0.1 < <0.05 <0.1 Nickel mg/l < <0.1 Selenium mg/l <0.3 <0.1 <0.1 <0.1 <0.3 Arsenic mg/l <0.3 <.1 <0.1 <0.1 <0.3 Zinc mg/l Cadmium mg/l <0.03 < <0.005 <0.03 Ammonia mg/l Total Kjeldahl Nitrogen mg/l Total Phosphorus mg/l Total Solids mg/l Volatile Solids mg/l Nitrite mg/l PO4 mg/l TSS mg/l