WEF Capstone Project

Technical Drawings

Decision Matrices

Project Abstract

NAU WEF Capstone 2020

Abstract

The Kyrene Water Reclamation Facility (KWRF) was designed to be a scalping plant which pulled a portion of wastewater from the Guadalupe Road Sewer Line. The facility opened in 1991, was expanded in 2006 to handle an average flow of 9 million gallons per day (MGD), and subsequently taken offline in 2010. Before the facility was shut down, the plant had an average capacity of 9 MGD and was able to produce Class A+ effluent. The City of Tempe plans on construction completion and site start-up by the year 2025. This start-up entails a projected average daily flow of 3.0 MGD of Class A+ effluent. Half of this effluent is planned on being used as irrigation for the Ken McDonald Golf Course and for cooling water at Salt River Project’s Kyrene Generating Station while the remaining half is geared towards being available for groundwater recharge.

The retrofit of this facility was designed to be completed in a three-phase expansion. Phase 1 consists of the demolition and reconstruction of all necessary features for the plant to start-up. Phase 2 consists of the implementation and profiting of the biosolids system. Phase 3 consists of the addition of energy efficiency improvements regarding solar panels placed strategically around the facility in order to incorporate the use of green energy. The enclosed report consists of an existing technology assessment, influent and effluent analysis, proposed effluent usage, technology upgrade options, technology downsizing options, economic analysis, and future recommendations regarding the proposed technology improvements.

Constraints

The constraints and limitations associated with this project revolve around the limited space on-sit. The boundaries for the facility cannot be expanded so all renovations must consider that space is limited and that the addition of new structures must still allow for efficient and effective day to day operations. Another constraints/ limitation is the cost associated with the rehabilitation and start-up of this facility.

Decision Matrices

NAU WEF Capstone 2020

Preliminary Treatment Decission Matrix

Preliminary Treatment Decision Matrix shows, the treatment process labeled alternative 2 was deemed optimal. It is then recommended that the three current VFD submersible pumps be replaced with 2 Dry-Well pumps. The pumps are recommended to be Robocco turbine pumps series 14JHE.

Primary Treatment Decission Matrix

The Primary Treatment Decision Matrix, the treatment process labeled alternative 2 scored the highest. This alternative includes a reduced equalization basin and the addition of ballasted flocculation. The flow equalization basin is to be located downstream of the headworks. The reduced flow equalization basin will require three new pumps to compensate for the change in flow since pumps are designed to run near their point of highest efficiency. Two of the three pumps will be running while the other is on standby.

Secondary Treatment Decission Matrix

Alternative 2: Anammox Reactor received the highest score and was deemed optimal. Three VFD turbine pumps series 12JMO from Robocco Pumps in the recycle pump station replace the three existing pumps.

Advanced Treatment Decission Matrix

Advanced Treatment Decision Matrix: The treatment which scored the highest was alternative 2, which is a combination of VigorOX WWTII Wastewater Chemical Disinfectant followed by treatment through an array of UV reactor trains. The cleaning and electrical methods of the UV system will stay the same, while the addition of VigorOX will provide a secondary service of reducing scale build up and algae presence in and before the UV lamps. The pumps are recommended to be Robocco turbine pumps series 14JMO.

Biosolids Handling Decission Matrix

the alkaline stabilization process in the form of Synagro’s Bio-Fix. The design and operational requirements for the bio-fix system is based on Mark Girovich’s Biosolids Treatment and Management: Process for Beneficial Use.

Project Tasks

NAU WEF Capstone 2020

Task 1: Research Preparation
Task 1.1: Application Process
Task 1.2: Treatment Technology Research
Task 2: Site Assessment
Task 2.1: Site Research
Task 2.2: Site Visit
Task 3: Treatment Design
Task 3.1: Plant Requirements
Task 3.1.1: Source Water Characteristics
Task 3.1.2: Population Estimation
Task 3.1.3: Codes and Effluent Limits
Task 3.2: Preliminary Treatment
Task 3.2.1 Screen Design Decision
Task 3.2.2: Grit Chamber Design Decision
Task 3.3: Primary Treatment
Task 3.3.1 Sedimentation Basin Design
Task 3.3.2 Coagulation and Flocculation
Task 3.3.3 Primary Sludge Handling
Task 3.4: Secondary Treatment
Task 3.4.1: Organic Matter and BOD Removal
Task 3.4.2: Disinfection
Task 3.5: Tertiary Treatment
Task 3.6: Sludge/Biosolids Management
Task 4: Cost/ Economics Task 4.1: Life Expectancy
Task 4.2: Construction Costs
Task 4.3: Maintenance Costs
Task 4.4: Operation Costs
Task 5: Project Impacts
Task 5.1: Social Impacts
Task 5.2: Economic Impacts
Task 5.3: Regulatory Impacts
Task 5.4: Environmental Impacts
Task 6: Project Deliverables
Task 6.1: Reports
Task 6.1.1: 30% Progress Report
Task 6.1.2: 60% Progress Report
Task 6.1.3: 90% Progress Report
Task 6.1.4: Final Report
Task 6.2: Presentations
Task 6.2.1: 30% Progress Presentation
Task 6.2.2: 60% Progress Presentation
Task 6.2.3: 90% Progress Presentation
Task 6.2.4: Final Presentation
Task 6.2.5: UGRAD Presentation
Task 6.3: Website
Task 6.4: Competition Submittals
Task 7: Project management
Task 7.1: Meetings
Task 7.2: Schedule Management
Task 7.3: Resource Management