The First Class A-1 Effluent Permit in Montana Moonlight Basin, Big - - PowerPoint PPT Presentation

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The First Class A-1 Effluent Permit in Montana Moonlight Basin, Big - - PowerPoint PPT Presentation

Dec 31, 2022 204 likes •597 views

The First Class A-1 Effluent Permit in Montana Moonlight Basin, Big Sky Montana Topics Effluent Reuse Treatment Selection Design & Permitting Construction Project Challenges 4/30/2020 The First Class A-1

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The First Class A-1 Effluent Permit in Montana

Moonlight Basin, Big Sky Montana

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Topics

  • Effluent Reuse
  • Treatment Selection
  • Design & Permitting
  • Construction
  • Project Challenges

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Regulation

Montana DEQ Circular DEQ-2, Appendix B Class A-1 Standard

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Moonlight Basin Resort:

  • Original Plant was a trickling

filter system treating septic tank effluent. Disposal to drainfield.

  • An oxidation ditch treatment

plant replaced the original

  • plant. Storage ponds and

disposal to forest irrigation.

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Treatment Selection

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Treatment Selection

Preliminary Engineering Report

  • Make Recommendations For

Wastewater Treatment and Disposal

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Wastewater Treatment Alternatives

  • Single MBR
  • Existing Oxidation Ditch, 2 New Oxidation Ditches
  • Existing Oxidation Ditch, 2 New SBRs
  • Existing Oxidation Ditch, 2 New MBRs

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New Plant Effluent Disposal Options

  • Golf Irrigation
  • Surface Water Discharge
  • Groundwater Discharge
  • Class A-1 Compatible with Each Option

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Wastewater Treatment Selection

  • Existing Oxidation Ditch, 2 New MBRs Selected

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Design Pre-Selection

  • Request for Proposals
  • Solicitation from 3 Manufacturers
  • Conducted Interviews
  • Three Engineers Reviewed and Scored

Proposals

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Design Pre-Selection

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  • Treatment Requirements
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Design Pre-Selection

  • MBR Requirements

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Wastewater Equipment/Process Pre-Selection

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  • Selected Suez (formerly GE)
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Wastewater Equipment/Process Pre-Selection

  • 3 Train Bioreactors and Membrane Basins for Operational Flexibility
  • 4 Stage Process- Pre Anoxic, Aerobic, Post Anoxic, Membrane Basin

(Aerobic)

  • Process Chemical Systems- Sodium Hydroxide, MicroC, and Alum
  • Membrane Chemical Systems- Sodium Hypochlorite and Citric

Acid

  • ZW-500 Reinforced Hollow Fiber PVDF Membranes

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Wastewater Equipment/Process Pre-Selection

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Design- Overall Site Plan

New Plant Existing Oxidation Ditch Pond 3 Existing Effluent Pond

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Design- Plant Site Plan

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Design- Process Flow Diagram

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Design- Hydraulic Profile

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Design- Main Building

Processes Housed Indoors, Separate Headworks, Separate Chemical Rooms, Operator Lab and Offices

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Design-Lower Level Area

Access to Equipment, Flooded Suction for Influent Pump Station, MBR Pumping Systems, NPW and Effluent Pumping Systems

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Design-Solids Handling

Aerobic Digesters Equalization Screw Press Dewatering

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Permitting

  • Plans and Specifications Review

Submittal to DEQ, August 31, 2016

  • Provided Additional

Information About Storage Pond and Golf Irrigation.

  • Approved by DEQ: January 23,

2017

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Permitting

  • Monitoring Requirements

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Year Total Coliform Total Nitrogen BOD5 TSS 1 Weekly Bi-weekly Monthly Monthly 2 Monthly Monthly Quarterly Quarterly 3 Monthly Quarterly Quarterly Quarterly 4 and beyond Quarterly Quarterly Semi-annually Semi-annually

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Construction

  • Bids Due: January 2018
  • Contractor- Dick Anderson

Construction

  • Original Contract Amount: $8.36 M
  • Work began May 2018
  • Completed November 2019
  • Final Amount: $8.63 M

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May 3, 2018

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Construction

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July 3, 2018 August 3, 2018

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Construction

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September 14, 2018 October 30, 2018

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Construction

  • Challenge- Dry In For Work To

Continue Through The Winter

  • Pre-Engineered Steel Buildings

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November 30, 2018

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Construction

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January 7, 2019

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Construction

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August 27, 2019

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Construction

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September 30, 2019

  • Start-Up and Seeding
  • ~32,000 Gallons From Big Sky

County Water & Sewer District

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Construction-Final Completion

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Construction-Final Completion

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Fine Screens Influent Pumps

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Construction-Final Completion

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Bioreactors and UV Bioreactors

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Construction-Final Completion

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Process and Membrane Blowers MBR Pumps

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Construction-Final Completion

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Aerobic Digesters

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Challenges and Approaches

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  • Choosing Treatment and Disposal: Compile a PER to Study

and Recommend a Solution

  • 1st of a Kind Permitting: Research and Communicate with

Regulators

  • Existing Infrastructure: Permitting to Allow a New Use Includes

Inspections, Testing, and Reports

  • Construction: Managing Season and Suppliers
  • Start-Up: Provide Initial Operational Support
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Eric Blanksma, PE eblanksma@m-m.net 406-495-3434

Questions?