The Firm

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Camp Dresser McKee
Industrial Wastewater Pre-Treatment
Technologies Colorado Industrial User Training
Seminar, October 19, 2000 Tim Holbrook, P.E.,
DEE 303-298-1311
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Why is an industrial wastewater pre-treatment
system like an internet dot.com stock?

• No one you work with understands what they do
• Costs may not be related to value
• Go up and down in performance
• How to make money with either is a mystery

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Increasing or Changing Production?

• Will pre-treatment system be able to take new
  volume or constituents?
• How much will it cost to modify system?
• How much will it increase our surcharge?
• Time critical production at stake
• Space limitations
• Different technology may be applicable

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Back to Basics

• Industrial wastewater NOT like municipal/sanitary
  
• BOD/COD 300 mg/l industrial -5000 mg/l
• Physical characteristics
• Flow rates highly variable
• REPRESENTATIVE SAMPLES /FLOWs are a MUST!

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Technology Overview

• Physical
• Chemical
• Biological
• Mythical

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Physical

• equalization
• sceening/filtration
• mixing
• flocculaiton/settling
• GAC
• membranes
• evaporation, solidification

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Chemical

• gas transfer - aeration, air stripping, steam
  stripping
• adsorption
• oxidation, thermal destruction

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Biological

• aerobic
• anaerobic
• nitrification
• land treatment

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Technologies for Zero Discharge

• Biological oxidation
• Centrifuges
• Chemical oxidation
• Ion exchange
• Membrane Separation

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Biological Treatment
Process Influent
Application Source Reduction
Water Treatment Recycle
Treatment Cost 40 to 500 per million gallons
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Centrifuge
Polymer
Centrifuge Separation
Water for reuse
Process Influent
Thickened Sludge
Application Source Reduction X
Water Treatment Recycle X



Treatment Cost 60 to 2,000 per million
gallons
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Chemical Oxidation
Process Influent
Application Source Reduction
Water Treatment X Recycle
Treatment Cost 200 to 10,000 per million
gallons
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Ion Exchange
Regeneration Chemicals
Backwash Water
Process Influent
Spent Regenarant
Backwash Waste
Application Source Reduction X
Water Treatment X Recycle
X

Treatment Cost 250 to more than 1,000 per
million gallons
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Membrane Separation
Process Influent
Application Source Reduction X
Water Treatment X Recycle X

Treatment Cost 30 to more than 2,000 per
million gallons
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Update on Membranes for Industrial WW Treatment

• Chlorine tolerant
• New spiral wound and tubular configurations
• Better strength and versatility
• New coatings, better biofouling control

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Beverage Industry Example

• Soft drink bottler
• Installation Date- 1996
• Design Flow Rate- 120,000 gpd
• Design Feed COD- 4500 mg/l (Actual- 7000 mg/l)
• Permeate COD- lt 75 mg/l
• 3 food industry WWTP installations to date

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Vibratory Shear Enhanced Process

• High throughput while attaining high
  concentrations of suspended solids
• single pass
• unique patented membrane filtration process
• Vibrating membrane shears solids off surface to
  prevent fouling
• low horsepower consumption
• Wastewater treatment or product dewatering

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Membranes for Industrial Applications - Warning

• Pilot testing required
• Operator re-training required
• Membrane compatibility - all wastes
• Lead time for delivery may be long
• Limited vendors
• New technology will have growing pains

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Practical Considerations

• solid design basis
• mass balances critical
• building, electrical, mechanical CODES
• get it in writing from the vendor
• hydraulics
• residuals

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Recommendations

• Characterize waste stream focused on cost drivers
  
• Collect representative samples for analysis
• Brainstorm reuse, recycle, resell ideas
• Focused engineering feasibility studies,
  treatability tests
• Bench/pilot scale testing to develop accurate
  costs, schedules

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Plan-It STOATTM
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Features Include

• Steady state
• Process and hydraulic modeling
• Predictive and sizing calculations
• Plan view
• Cost comparison
• Online reference book
• Customized Web site

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Process Calculator

• Contains all common unit processes
• Calculates the mass balance
• Calculates by various methods
• Complex mechanistic effluent generation
• Simple empirical sizing models

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Create Plant Alternatives (Works) for Each Project
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Use a Template or Start from Scratch to Build
Schematic of Treatment Process
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Results Are Available

• On screen
• Bar chart (default)
• Process and hydraulics
• Printed reports
• Outside of program (Export file)

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Summarize Dimensions
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Create Hydraulic Profile
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Cost Comparison

• Capital and OM cost comparisons for all unit
  processes
• Cost indices can be changed by user
• Compatible with latest version of TR61
• COST A B (Cost Descriptor)C

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Benefits of Plan-It STOAT

• Unique, accurate, and rapid planning tool
• Allows works managers to check capacity of works
  at any time to improve efficiency
• Calculates efficiency savings
• process/hydraulics/costs
• Ability to rapidly compare asset costs
• Quickly differentiates between various upgrade
  schemes