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WWTP Capacity vs. Future Growth Purpose: Purpose: To provide an annual update to Council on available capacity at the WWTP To provide an annual update.

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Presentation on theme: "WWTP Capacity vs. Future Growth Purpose: Purpose: To provide an annual update to Council on available capacity at the WWTP To provide an annual update."— Presentation transcript:

1 WWTP Capacity vs. Future Growth Purpose: Purpose: To provide an annual update to Council on available capacity at the WWTP To provide an annual update to Council on available capacity at the WWTP Ensure that planning is ongoing to allow continued growth Ensure that planning is ongoing to allow continued growth Stay up to date with ever changing regulations Stay up to date with ever changing regulations

2 Components of Treatment Capacity Hydraulic Loading: Hydraulic Loading: Amount of water that enters the treatment plant or individual process. Amount of water that enters the treatment plant or individual process. Organic Loadings: Organic Loadings: Pollutants that originate from an organic source and exert a dissolved oxygen demand. This type of pollutant is measured with CBOD analysis. Pollutants that originate from an organic source and exert a dissolved oxygen demand. This type of pollutant is measured with CBOD analysis. Organic/Inorganic Loadings: Organic/Inorganic Loadings: Pollutants that originate from organic and inorganic sources that exert a dissolved oxygen demand. This type of pollutant is measured with COD analysis. Pollutants that originate from organic and inorganic sources that exert a dissolved oxygen demand. This type of pollutant is measured with COD analysis. Solids Loadings: Solids Loadings: Pollutants that are not dissolved in water. They can be organic or inorganic and are removed through sedimentation, filtration, or biologic treatment. Pollutants that are not dissolved in water. They can be organic or inorganic and are removed through sedimentation, filtration, or biologic treatment. Operational Condition of Plant Processes and Equipment Operational Condition of Plant Processes and Equipment

3 Interesting Facts Sidneys WWTP receives 45% of flow and 65% of loading from Industrial customers Sidneys WWTP receives 45% of flow and 65% of loading from Industrial customers Based on flow, Sidney has a population equivalent of a City with nearly 50,800 people. Based on flow, Sidney has a population equivalent of a City with nearly 50,800 people. Based on Loading, Sidney has a population equivalent of a city with nearly 60,200 people. Based on Loading, Sidney has a population equivalent of a city with nearly 60,200 people. Sidneys WWTP operates with a staffing level of about 55-65% of other similar sized treatment plants. Sidneys WWTP operates with a staffing level of about 55-65% of other similar sized treatment plants. The Sidney WWTPs Automation System (SCADA), equipment automation and continuous monitoring is one of the most extensive and complete systems in Ohio. The Sidney WWTPs Automation System (SCADA), equipment automation and continuous monitoring is one of the most extensive and complete systems in Ohio. Sidneys Industrial Pretreatment Program was nominated for a USEPAs Clean Water Award. Sidneys Industrial Pretreatment Program was nominated for a USEPAs Clean Water Award. Sidneys excellent compliance record has resulted in Biannual OEPA inspections rather than Annual inspections. Sidneys excellent compliance record has resulted in Biannual OEPA inspections rather than Annual inspections.

4 Capacity Trends Hydraulic Loading (Flow = MGD Million Gallons per Day) Hydraulic Loading (Flow = MGD Million Gallons per Day) Operating Data Maximum Designed Capacity MGD 5.0 MGD (pre-2002 Upgrade) MGD 5.0 MGD (pre-2002 Upgrade) MGD 7.0 MGD (post-2002 Upgrade) MGD 7.0 MGD (post-2002 Upgrade) MGD YTD MGD YTD

5 Capacity Trends Organic Loading (CBOD – Carbonaceous Biochemical Oxygen Demand = ORGANICS) Organic Loading (CBOD – Carbonaceous Biochemical Oxygen Demand = ORGANICS) Operating DataMaximum Designed Capacity Operating DataMaximum Designed Capacity ,896 lbs/day 11,000 lbs/day (pre-2002 Upgrade) ,896 lbs/day 11,000 lbs/day (pre-2002 Upgrade) ,248 lbs/day15,000 lbs/day (post-2002 Upgrade) ,248 lbs/day15,000 lbs/day (post-2002 Upgrade) ,093 lbs/ day YTD ,093 lbs/ day YTD

6 Capacity Trends Organic/Inorganic Loading (COD – Chemical Oxygen Demand = INORGANIC & ORGANICS) Organic/Inorganic Loading (COD – Chemical Oxygen Demand = INORGANIC & ORGANICS) Operating Data Maximum Designed Capacity Operating Data Maximum Designed Capacity ,306 lbs/day 22,000 lbs/day (pre-2002 Upgrade) ,306 lbs/day 22,000 lbs/day (pre-2002 Upgrade) ,249 lbs/day 30,300 lbs/day (post-2002 Upgrade) ,249 lbs/day 30,300 lbs/day (post-2002 Upgrade) ,098 lbs/day YTD ,098 lbs/day YTD

7 Capacity Trends Solids Loading Solids Loading Operating DataMaximum Designed Capacity ,976 lbs/day 10,700 lbs/day (pre-2002 Upgrade) ,976 lbs/day 10,700 lbs/day (pre-2002 Upgrade) ,328 lbs/day10,700 lbs/day (post-2002 Upgrade) ,328 lbs/day10,700 lbs/day (post-2002 Upgrade) ,455 lbs/ day YTD ,455 lbs/ day YTD

8 Challenges Discharges that exceed the permitted limit of Industrial Users Discharges that exceed the permitted limit of Industrial Users Industrial Discharges that are non-compliant contain pollutants that can cause operational problems, NPDES Permit violations, and/or can be toxic to the WWTP microorganisms. Industrial Discharges that are non-compliant contain pollutants that can cause operational problems, NPDES Permit violations, and/or can be toxic to the WWTP microorganisms. We work closely with the IUs in question to return to compliance. We work closely with the IUs in question to return to compliance. No NPDES Permit violations or significant operational problems attributed to IU discharges. No NPDES Permit violations or significant operational problems attributed to IU discharges. Hydraulic capacity of Solids Treatment Process Hydraulic capacity of Solids Treatment Process Average solids hydraulic loading is at 106% of capacity Average solids hydraulic loading is at 106% of capacity Solids Treatment was not part of 2002 upgrade Solids Treatment was not part of 2002 upgrade Solids Treatment process overall operates well. Solids Treatment process overall operates well. This treatment process will be looked at in the planning study. This treatment process will be looked at in the planning study. Minimal Staffing: Minimal Staffing: Most WWTPs sized MGD have FTE staff members. Most WWTPs sized MGD have FTE staff members. Sidneys WWTP has 8 FTE staff members. Sidneys WWTP has 8 FTE staff members. The Sidney WWTP relies heavily on automation, continuous monitoring, and a well trained and dedicated staff for efficient operation. The Sidney WWTP relies heavily on automation, continuous monitoring, and a well trained and dedicated staff for efficient operation.

9 Challenges Contd Power Losses Power Losses Occasional loss of power has identified the need for additional generator capacity. Occasional loss of power has identified the need for additional generator capacity. Current generator operates influent pumps only. Current generator operates influent pumps only. Planning study will include a detailed look at feasibility of co- generation (heat & electricity) with the use of micro turbines. Planning study will include a detailed look at feasibility of co- generation (heat & electricity) with the use of micro turbines. Process Control Equipment Process Control Equipment Process control equipment that was not replaced during the 2002 expansion is nearing the end of its serviceable life Process control equipment that was not replaced during the 2002 expansion is nearing the end of its serviceable life Many of these items are identified in the capital improvement plan and others are addressed with funding available in the operating budget. Many of these items are identified in the capital improvement plan and others are addressed with funding available in the operating budget. Larger equipment/process replacement items will not be included in either the Five Year Plan or the Operating Budget until after the planning study has been completed. Larger equipment/process replacement items will not be included in either the Five Year Plan or the Operating Budget until after the planning study has been completed. Lack of automation and efficiency in aeration process. Lack of automation and efficiency in aeration process. Diffusers were beyond service life and highly inefficient. Currently being replaced Diffusers were beyond service life and highly inefficient. Currently being replaced Motorized valves in aeration basins are not operating. 3 valves have recently been replaced. The remaining 5 valves are ordered and will be in operation before the end of the year. Motorized valves in aeration basins are not operating. 3 valves have recently been replaced. The remaining 5 valves are ordered and will be in operation before the end of the year.

10 What does it all mean? How much growth can we handle? It depends… What is the expected loadings from the Industrial Customer? How much ORGANIC, INORGANIC, & SOLIDS Loading is expected? What is the flow rate from the potential Industrial Customer? Additional flow can have a negative impact on overall WWTP performance. What is the make-up of the discharge? Some compounds (TKN) are more difficult to break down than others. What will the next NPDES permit contain? There is a possibility that nutrient removal could be required. Nutrients = Nitrogen & Phosphorous Sidneys WWTP currently does not have design considerations for these type of treatment processes

11 Realistic Expectations How much growth can we handle? How much growth can we handle? Using existing Industries as a reference: Using existing Industries as a reference: 1.25 additional Industries equivalent to 1.25 additional Industries equivalent to Organic/Inorganic Loading Organic/Inorganic Loading Flow FlowOr 6 additional Industries equivalent to 6 additional Industries equivalent to Flow Flow Local Limits for Metals Local Limits for MetalsOr 3 additional Industries equivalent to 3 additional Industries equivalent to Organic Loading Organic LoadingOr 15 additional Industries equivalent to 15 additional Industries equivalent to Organic Loading Organic Loading

12 WHAT WILL THE FUTURE BRING? Loss of Cargill Protein Loss of Cargill Protein Large user that discharged nearly 250,000 GPD (Gallons per Day) Large user that discharged nearly 250,000 GPD (Gallons per Day) Generated nearly $100,000 year in surcharge fees. Generated nearly $100,000 year in surcharge fees. Actual loss of Cargill surcharge is difficult to quantify. Actual loss of Cargill surcharge is difficult to quantify. Surcharges may be recovered from other parts of the Cargill facility. What will the affects on the WWTP be? Surcharges may be recovered from other parts of the Cargill facility. What will the affects on the WWTP be? Cargill Protein waste is very complex and difficult to break down. Cargill Protein waste is very complex and difficult to break down. Future nutrient limits will be easier and less expensive to achieve Future nutrient limits will be easier and less expensive to achieve Demand of aeration process will be reduced. Demand of aeration process will be reduced. 1 pound of Protein waste requires nearly twice the air as 1 pound of waste from any other user. 1 pound of Protein waste requires nearly twice the air as 1 pound of waste from any other user.

13 WHAT WILL THE FUTURE BRING? Contd 2008 Upgrades 2008 Upgrades Commission of a new 9.0 MGD Raw Water Pump. Commission of a new 9.0 MGD Raw Water Pump. Experimental process with the polymer system that has the potential to improve chemical efficiency by 15% or $13,500/yr. Experimental process with the polymer system that has the potential to improve chemical efficiency by 15% or $13,500/yr. Aeration system will return to completely automated. In conjunction with the diffuser replacement this process will be at 100% efficiency. Aeration system will return to completely automated. In conjunction with the diffuser replacement this process will be at 100% efficiency. Future Wastewater Plant Planning Study Future Wastewater Plant Planning Study Currently in the 5-year plan for 2008 Currently in the 5-year plan for 2008 Scheduled Replacement of Diffusers Scheduled Replacement of Diffusers Diffuser replacement is scheduled in the five year plan to occur annually starting in (2 Aeration Basins each year) Diffuser replacement is scheduled in the five year plan to occur annually starting in (2 Aeration Basins each year) This will optimize efficiency, reduce utility costs, and provide maximum treatment capacity. This will optimize efficiency, reduce utility costs, and provide maximum treatment capacity. Diffusers have a service life of 3 years before efficiency is diminished. Diffusers have a service life of 3 years before efficiency is diminished. It requires nearly 40 man hours to replace the diffusers in one basin. It requires nearly 40 man hours to replace the diffusers in one basin. This year, all basins are in the process of being replaced at a total of 240 man hours. This year, all basins are in the process of being replaced at a total of 240 man hours.

14 WHAT WILL THE FUTURE BRING? Contd Next Upgrade Recommendations: Next Upgrade Recommendations: Increase Solids Treatment Capacity Increase Solids Treatment Capacity Class A Biosolids? Class A Biosolids? Capitalize on beneficial use of methane (cogeneration) Capitalize on beneficial use of methane (cogeneration) Increase Hydraulic Capacity Increase Hydraulic Capacity Increase Organic/Inorganic Capacity Increase Organic/Inorganic Capacity Increase Back-up Generator Capacity Increase Back-up Generator Capacity Replace Chlorine disinfection with UV technology Replace Chlorine disinfection with UV technology Planning Study will identify short & long term needs and feasibility of energy recovery projects. Planning Study will identify short & long term needs and feasibility of energy recovery projects. OEPA has proposed significant changes to the rules concerning land application of biosolids. OEPA has proposed significant changes to the rules concerning land application of biosolids. Could increase disposal costs of biosolids by 300% or more if enacted. Could increase disposal costs of biosolids by 300% or more if enacted.

15 ANNUAL PRESENTATION Staff will be presenting an overview of Capacity vs. Future Growth each September so that Council can be apprised of future needs. This is in conformance with Sidney 2020! Staff will be presenting an overview of Capacity vs. Future Growth each September so that Council can be apprised of future needs. This is in conformance with Sidney 2020! This will also help readily identify our ability to meet the needs of new and existing Industrial Customers. This will also help readily identify our ability to meet the needs of new and existing Industrial Customers.

16 Questions or Comments? Questions or Comments?


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