WWTP Capacity vs. Future WWTP Capacity vs. Future GrowthGrowth

► Purpose:Purpose: To provide an annual To provide an annual

update to Council on update to Council on available capacity at available capacity at the WWTPthe WWTP

Ensure that planning Ensure that planning is ongoing to allow is ongoing to allow continued growth continued growth

Stay up to date with Stay up to date with ever changing ever changing regulationsregulations

Components of Treatment Components of Treatment CapacityCapacity

► 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 Pollutants that originate from an organic source and exert a dissolved

oxygen demand. This type of pollutant is measured with CBOD oxygen demand. This type of pollutant is measured with CBOD analysis.analysis.

► Organic/Inorganic Loadings:Organic/Inorganic Loadings: Pollutants that originate from organic and inorganic sources that Pollutants that originate from organic and inorganic sources that

exert a dissolved oxygen demand. This type of pollutant is measured exert a dissolved oxygen demand. This type of pollutant is measured with COD analysis.with COD analysis.

► Solids Loadings: Solids Loadings: Pollutants that are not dissolved in water. They can be organic or Pollutants that are not dissolved in water. They can be organic or

inorganic and are removed through sedimentation, filtration, or inorganic and are removed through sedimentation, filtration, or biologic treatment. biologic treatment.

► Operational Condition of Plant Processes and Operational Condition of Plant Processes and EquipmentEquipment

Interesting FactsInteresting Facts

► Sidney’s WWTP receives 45% of flow and 65% of loading from Sidney’s WWTP receives 45% of flow and 65% of loading from Industrial customersIndustrial customers Based on flow, Sidney has a population equivalent of a City with Based on flow, Sidney has a population equivalent of a City with

nearly 50,800 people.nearly 50,800 people. Based on Loading, Sidney has a population equivalent of a city Based on Loading, Sidney has a population equivalent of a city

with nearly 60,200 people.with nearly 60,200 people.► Sidney’s WWTP operates with a staffing level of about 55-65% Sidney’s WWTP operates with a staffing level of about 55-65%

of other similar sized treatment plants.of other similar sized treatment plants.► The Sidney WWTP’s Automation System (SCADA), equipment The Sidney WWTP’s Automation System (SCADA), equipment

automation and continuous monitoring is one of the most automation and continuous monitoring is one of the most extensive and complete systems in Ohio.extensive and complete systems in Ohio.

► Sidney’s Industrial Pretreatment Program was nominated for a Sidney’s Industrial Pretreatment Program was nominated for a USEPA’s Clean Water Award.USEPA’s Clean Water Award.

► Sidney’s excellent compliance record has resulted in Biannual Sidney’s excellent compliance record has resulted in Biannual OEPA inspections rather than Annual inspections.OEPA inspections rather than Annual inspections.

Capacity TrendsCapacity Trends► Hydraulic Loading (Flow = MGD Million Gallons per Hydraulic Loading (Flow = MGD Million Gallons per

Day)Day)Operating DataOperating Data Maximum Designed CapacityMaximum Designed Capacity 2005 2005 5.995.99 MGD MGD 5.0 MGD 5.0 MGD (pre-2002 Upgrade)(pre-2002 Upgrade)

2006 2006 5.835.83 MGD 7.0 MGD MGD 7.0 MGD (post-2002 Upgrade)(post-2002 Upgrade)

2007 2007 5.585.58 MGD YTD MGD YTD

0.0

2.5

5.0

7.5

2005 2006 2007

Capacity TrendsCapacity Trends

► Organic Loading (CBOD – Carbonaceous Biochemical Organic Loading (CBOD – Carbonaceous Biochemical Oxygen Demand = ORGANICS)Oxygen Demand = ORGANICS) Operating DataOperating Data Maximum Designed Maximum Designed

CapacityCapacity 2005 2005 9,8969,896 lbs/day lbs/day 11,000 lbs/day 11,000 lbs/day (pre-2002 Upgrade)(pre-2002 Upgrade)

2006 2006 10,24810,248 lbs/day lbs/day 15,000 lbs/day 15,000 lbs/day (post-2002 Upgrade)(post-2002 Upgrade)

2007 2007 11,09311,093 lbs/ day YTD lbs/ day YTD

03,0006,0009,000

12,00015,000

2005 2006 2007

Capacity TrendsCapacity Trends► Organic/Inorganic Loading (COD – Chemical Oxygen Organic/Inorganic Loading (COD – Chemical Oxygen

Demand = INORGANIC & ORGANICS)Demand = INORGANIC & ORGANICS) Operating DataOperating Data Maximum Designed CapacityMaximum Designed Capacity 2005 2005 21,30621,306 lbs/day 22,000 lbs/day lbs/day 22,000 lbs/day (pre-2002 Upgrade)(pre-2002 Upgrade)

2006 2006 22,24922,249 lbs/day lbs/day 30,300 lbs/day 30,300 lbs/day (post-2002 Upgrade)(post-2002 Upgrade)

2007 2007 25,09825,098 lbs/day YTD lbs/day YTD

06,000

12,00018,00024,00030,000

2005 2006 2007

Capacity TrendsCapacity Trends

► Solids LoadingSolids LoadingOperating DataOperating Data Maximum Designed CapacityMaximum Designed Capacity 2005 2005 6,9766,976 lbs/day lbs/day 10,700 lbs/day 10,700 lbs/day (pre-2002 Upgrade)(pre-2002 Upgrade)

2006 2006 7,3287,328 lbs/day lbs/day 10,700 lbs/day 10,700 lbs/day (post-2002 Upgrade)(post-2002 Upgrade)

2007 2007 7,455 7,455 lbs/ day YTDlbs/ day YTD

02,5005,0007,500

10,000

2005 2006 2007

ChallengesChallenges► Discharges that exceed the permitted limit of Industrial Discharges that exceed the permitted limit of Industrial

UsersUsers Industrial Discharges that are non-compliant contain Industrial Discharges that are non-compliant contain

pollutants that can cause operational problems, NPDES pollutants that can cause operational problems, NPDES Permit violations, and/or can be toxic to the WWTP Permit violations, and/or can be toxic to the WWTP microorganisms. microorganisms.

► We work closely with the IUs in question to return to We work closely with the IUs in question to return to compliance.compliance.

► No NPDES Permit violations or significant operational problems No NPDES Permit violations or significant operational problems attributed to IU discharges.attributed to IU discharges.

► Hydraulic capacity of Solids Treatment ProcessHydraulic capacity of Solids Treatment Process Average solids hydraulic loading is at 106% of capacityAverage solids hydraulic loading is at 106% of capacity Solids Treatment was not part of 2002 upgradeSolids 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 5.0-7.0 MGD have 11-13 FTE staff Most WWTPs sized 5.0-7.0 MGD have 11-13 FTE staff

members.members. Sidney’s WWTP has 8 FTE staff members.Sidney’s WWTP has 8 FTE staff members. The Sidney WWTP relies heavily on automation, continuous The Sidney WWTP relies heavily on automation, continuous

monitoring, and a well trained and dedicated staff for monitoring, and a well trained and dedicated staff for efficient operation.efficient operation.

Challenges Cont’dChallenges Cont’d► Power LossesPower Losses

Occasional loss of power has identified the need for additional Occasional loss of power has identified the need for additional generator capacity.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-Planning study will include a detailed look at feasibility of co-

generation (heat & electricity) with the use of micro turbines. generation (heat & electricity) with the use of micro turbines.

► Process Control EquipmentProcess Control Equipment Process control equipment that was not replaced during the 2002 Process control equipment that was not replaced during the 2002

expansion is nearing the end of its serviceable lifeexpansion is nearing the end of its serviceable life► Many of these items are identified in the capital improvement Many of these items are identified in the capital improvement

plan and others are addressed with funding available in the plan and others are addressed with funding available in the operating budget.operating budget.

► Larger equipment/process replacement items will not be Larger equipment/process replacement items will not be included in either the Five Year Plan or the Operating Budget included in either the Five Year Plan or the Operating Budget until after the planning study has been completed.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. Diffusers were beyond service life and highly inefficient.

Currently being replacedCurrently being replaced Motorized valves in aeration basins are not operating. 3 Motorized valves in aeration basins are not operating. 3

valves have recently been replaced. The remaining 5 valves have recently been replaced. The remaining 5 valves are ordered and will be in operation before the end valves are ordered and will be in operation before the end of the year.of the year.

What does it all mean?What does it all mean?► How much growth can we handle?How much growth can we handle?

It depends…It depends…► What is the expected loadings from What is the expected loadings from

the Industrial Customer?the Industrial Customer? How much ORGANIC, INORGANIC, & How much ORGANIC, INORGANIC, &

SOLIDS Loading is expected?SOLIDS Loading is expected?► What is the flow rate from the What is the flow rate from the

potential Industrial Customer?potential Industrial Customer? Additional flow can have a negative Additional flow can have a negative

impact on overall WWTP impact on overall WWTP performance.performance.

► What is the make-up of the What is the make-up of the discharge?discharge?

Some compounds (TKN) are more Some compounds (TKN) are more difficult to break down than others.difficult to break down than others.

► What will the next NPDES permit What will the next NPDES permit contain? contain?

There is a possibility that nutrient There is a possibility that nutrient removal could be required.removal could be required.

► Nutrients = Nitrogen & Nutrients = Nitrogen & PhosphorousPhosphorous

► Sidney’s WWTP currently does Sidney’s WWTP currently does not have design considerations not have design considerations for these type of treatment for these type of treatment processesprocesses

Realistic ExpectationsRealistic Expectations► How much growth can we handle?How much growth can we handle?

Using existing Industries as a Using existing Industries as a reference:reference:

► 1.251.25 additional Industries additional Industries equivalent toequivalent to

Organic/Inorganic LoadingOrganic/Inorganic Loading Flow Flow

OrOr

► 66 additional Industries equivalent to additional Industries equivalent to FlowFlow Local Limits for Metals Local Limits for Metals

OrOr

► 33 additional Industries equivalent to additional Industries equivalent to Organic LoadingOrganic Loading

OrOr

► 1515 additional Industries equivalent additional Industries equivalent toto

Organic LoadingOrganic Loading

WHAT WILL THE FUTURE BRING?WHAT WILL THE FUTURE BRING?

► Loss of Cargill ProteinLoss of Cargill Protein Large user that discharged nearly 250,000 GPD Large user that discharged nearly 250,000 GPD

(Gallons per Day)(Gallons per Day) Generated nearly $100,000 year in surcharge Generated nearly $100,000 year in surcharge

fees.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 Surcharges may be recovered from other parts of the Cargill facility. What will the affects on the WWTP be?Cargill facility. What will the affects on the WWTP be?

Cargill Protein waste is very complex and difficult Cargill Protein waste is very complex and difficult to break down.to break down.

► Future nutrient limits will be easier and less expensive Future nutrient limits will be easier and less expensive to achieveto 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 1 pound of Protein waste requires nearly twice the air as 1

pound of waste from any other user. pound of waste from any other user.

WHAT WILL THE FUTURE BRING?WHAT WILL THE FUTURE BRING?Cont’dCont’d

► 2008 Upgrades2008 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 Experimental process with the polymer system that has the potential

to improve chemical efficiency by 15% or $13,500/yr.to improve chemical efficiency by 15% or $13,500/yr. Aeration system will return to completely automated. In conjunction Aeration system will return to completely automated. In conjunction

with the diffuser replacement this process will be at 100% efficiency.with the diffuser replacement this process will be at 100% efficiency.

► Future Wastewater Plant Planning StudyFuture Wastewater Plant Planning Study Currently in the 5-year plan for 2008Currently in the 5-year plan for 2008

► Scheduled Replacement of DiffusersScheduled Replacement of Diffusers Diffuser replacement is scheduled in the five year plan to occur Diffuser replacement is scheduled in the five year plan to occur

annually starting in 2010. (2 Aeration Basins each year) annually starting in 2010. (2 Aeration Basins each year) This will optimize efficiency, reduce utility costs, and provide maximum This will optimize efficiency, reduce utility costs, and provide maximum

treatment capacity.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 This year, all basins are in the process of being replaced at a total of 240

man hours.man hours.

WHAT WILL THE FUTURE BRING?WHAT WILL THE FUTURE BRING?Cont’dCont’d

► Next Upgrade Recommendations:Next Upgrade Recommendations: Increase Solids Treatment CapacityIncrease Solids Treatment Capacity

► Class A Biosolids?Class A Biosolids?► Capitalize on beneficial use of methane Capitalize on beneficial use of methane

(cogeneration)(cogeneration) Increase Hydraulic CapacityIncrease Hydraulic Capacity Increase Organic/Inorganic CapacityIncrease Organic/Inorganic Capacity Increase Back-up Generator Capacity Increase Back-up Generator Capacity Replace Chlorine disinfection with UV technologyReplace Chlorine disinfection with UV technology Planning Study will identify short & long term needs Planning Study will identify short & long term needs

and feasibility of energy recovery projects.and feasibility of energy recovery projects.

► OEPA has proposed significant changes to the OEPA has proposed significant changes to the rules concerning land application of biosolids.rules concerning land application of biosolids. Could increase disposal costs of biosolids by 300% or Could increase disposal costs of biosolids by 300% or

more if enacted.more if enacted.

ANNUAL PRESENTATIONANNUAL PRESENTATION

Staff will be presenting an overview of Staff will be presenting an overview of Capacity vs. Future Growth each Capacity vs. Future Growth each September so that Council can be September so that Council can be apprised of future needs. This is in apprised of future needs. This is in conformance with Sidney 2020!conformance with Sidney 2020!

This will also help readily identify our This will also help readily identify our ability to meet the needs of new and ability to meet the needs of new and existing Industrial Customers.existing Industrial Customers.

► Questions or Comments?Questions or Comments?