La. Food Processors Conference Facility Upgrade and Expansion Considerations for Treatment of Process Waste - PowerPoint PPT Presentation

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La. Food Processors Conference Facility Upgrade and Expansion Considerations for Treatment of Process Waste

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Title: La. Food Processors Conference Facility Upgrade and Expansion Considerations for Treatment of Process Waste


1
La. Food Processors ConferenceFacility Upgrade
and Expansion Considerations for Treatment of
Process Waste
  • Todd Farrar, P.E.M.
  • General Engineering Environmental Companies,
    Inc.

2
Topics
  • Considerations For Upgrade or Expansion of
    Process Waste Treatment Facilities
  • Wastewater
  • Solid Waste

3
Should You Treat Your Wastewater or Not?
  • Wastewater Disposal Options
  • Discharge Directly to Waterbody with Treatment
  • Discharge to Publicly Owned Treatment Works
    (POTW) without Treatment
  • Discharge to POTW with Pre-Treatment

4
Discharging Directly to Waterbody
  • Advantages
  • Only choice if facility is not close to POTW
    collection system
  • There are no surcharges to pay
  • DisAdvantages
  • Operation and Maintenance of system can be costly
  • Much lower effluent limits than POTW (Typically
    30 or 45 mg/l BOD5 and TSS)
  • Requires NPDES Permit

5
Discharging to POTW without Treating Wastewater
  • Advantages
  • No Capital Cost for Treatment Facilities
  • No Operation and Maintenance Costs
  • Disadvantage
  • Expensive Surcharges

6
Discharging to POTW with Pre-Treatment
  • Advantages
  • Lower or No Excess Sewerage Strength Surcharges
  • Disadvantages
  • Initial Capital Expenditure
  • Higher Operations and Maintenance Costs

7
Typical POTW Surcharges
  • Sewerage and Water Board of New Orleans
  • Excess Sewerage Formula
  • Charge (Volume in million gallons x 8.34) x
    (0.2092(Actual BOD5 285 mg/l)
    (0.1397(Actual TSS 395 mg/l)

8
Example Surcharge
  • 1 Million Gallons of Wastewater
  • BOD5 of 600 mg/l TSS of 500 mg/l
  • Calculations
  • (1.0 x 8.34) x (0.2092 x (600 285)
  • (0.1397 x (500 395) 8.34 x (65.90
  • 14.67) 671.96

9
Wastewater Reduction
  • Recycle Wastewater
  • POTWs base Surcharges on Water Usage
  • Wastewater can be treated and reused
  • Typically water cost about 2,000.00 per million
    gallons (depending on location)
  • Process changes to reduce usage
  • Isolate Clean or non-process wastewater to be
    directed to Stormwater system

10
Solid Waste
  • Only other significant source of pollution in
    Seafood Processing
  • Recycled for use in mulches
  • Alternative uses
  • Chitosan derived from Chitin found in crustacean
    shells has been used for
  • Clean stormwater
  • Fat-blockers in diet pills
  • Thicken food, paint and makeup
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