7/31/2019 Carbon Enhanced MBRs
1/20
CARBON ENHANCED MBRs
William Conner P.E., DEE
7/31/2019 Carbon Enhanced MBRs
2/20
Outline
Oily WW Treatment Challenges
Treatment OptionsBiological IWWTP & GAC Columns
PACT WWTP
MBR & GAC Columns
PAC MBR (Carbon Enhanced MBR)
Conclusion / Summary
7/31/2019 Carbon Enhanced MBRs
3/20
Problem
Refinery / Oil Processing Wastewater
High Temp (> 50 C)Bio Difficult
High Chlorides (->1,000 mg/L )
V. High TDS Variability
High Ammonia/Phenol ConcentrationsFrequent Flow interruptions
Refractory Organics
High Maintenance Sensitivity Water Conservation Important
7/31/2019 Carbon Enhanced MBRs
4/20
Main Concern
- Refractory Organics -
Conventional WWTPNot FeasibleCarbon Adsorption Required
7/31/2019 Carbon Enhanced MBRs
5/20
Treatment Options
Oil/Water Sep. & Conventional IWWTP
Conventional IWWTP & GAC Columns
PACT IWWTP
Oil/Water Separation & MBR
MBR & GAC Columns
PAC MBR (Carbon Enhanced)
7/31/2019 Carbon Enhanced MBRs
6/20
Conventional Biological Treatment& GAC Columns
To Effluent
Lagoons
StormWater
Basin
WalnutShell
FiltersActivated
Sludge with
DAF???
Refinery Stormwater,
Process Wastewater,
Oil to Slop
Oil System
ChillerPolymer
Methanol &
pH Control
Biosludge
ThickeningDewatered Biosludge
to Disposal
SanitaryWastewater
API
Separators
EQ
Tanks
GACM
Phosphate
Chlorination
7/31/2019 Carbon Enhanced MBRs
7/20
PACT Biological Treatment
WalnutShell
FiltersPACT
Activated
Sludge withDAF???
Refinery Stormwater,
Process Wastewater,
To Effluent
Lagoons
Oil to Slop
Oil System
ChillerPolymer
Methanol &
pH Control
Biosludge
ThickeningDewatered Biosludge
to Disposal
SanitaryWastewater
API
Separators
EQ
Tanks
M
Phosphate
Chlorination
StormWater
Basin
7/31/2019 Carbon Enhanced MBRs
8/20
Conventional Biological TreatmentAdvantages / Disadvantages
Advantages Most common system
Disadvantages Biomass unstablefeed fluctuations = upsets
Solids wont settle in Clarifier Cant meet effluent requirements w/o GAC Ammonia may be toxic Extensive plot area required to accommodate
equipmentSpace Limitations
7/31/2019 Carbon Enhanced MBRs
9/20
MBR & GAC Process Design
WW fromPrimary
Treatment
MBR
Marine Discharge
GAC
7/31/2019 Carbon Enhanced MBRs
10/20
MBR & GACAdvantages / Disadvantages
Advantages No Clarifier = No Settling Problems Smaller Footprint More Stable Biomass
Disadvantages Membrane Fouling High Cost for GAC
7/31/2019 Carbon Enhanced MBRs
11/20
PAC MBR Process Design
PAC MBR
Marine DischargeMarine Discharge
WW fromPrimary
Treatment
7/31/2019 Carbon Enhanced MBRs
12/20
PAC MBR (Carbon Enhanced)Advantages / Disadvantages
Advantages No Clarifier = No Settling Problems Smaller Footprint More Stable Biomass Lower Cost for Carbon No Fouling Reuse Possible
Disadvantages Membrane Abrasion
7/31/2019 Carbon Enhanced MBRs
13/20
PAC MBR COD Removal
Refinery WW - COD Removal
PAC PetroMBR
0
200
400
600
800
1000
1200
1400
11/19/2006 12/9/2006 12/29/2006 1/18/2007 2/7/2007 2/27/2007 3/19/2007
Date
COD,mg/L
Feed COD Effluent COD
7/31/2019 Carbon Enhanced MBRs
14/20
MBR & PAC MBR Comparison
Feed MBR
Removal %
PAC MBR
Removal %
BOD ~400 mg/L (~4 mg/L)
99%
(~5 mg/L)
99%
COD ~750 mg/L (151 mg/L)81%
(46 mg/l)92%
TOC ~200 mg/L (27 mg/L)86%
(11 mg/L)94%
7/31/2019 Carbon Enhanced MBRs
15/20
Effluent Comparison
7/31/2019 Carbon Enhanced MBRs
16/20
Membrane Comparison
7/31/2019 Carbon Enhanced MBRs
17/20
MBRPAC MBR RO Comparison
MBR PAC MBR
Silica - Total 1.1 mg/L
7/31/2019 Carbon Enhanced MBRs
18/20
MBR & GAC vs. PAC MBR
MBR & GAC PAC MBR
High Op. Cost for GAC Lower Op. Cost
Higher Capital Cost Lower Capital Cost
Slow Acclimation Immediate Acclimation
Susceptible to Upsets Tolerant to Upsets
Frequent Cleaning Less Frequent Cleaning
Poor Refractory Removal Ex. Refractory Removal
Slow Drying Sludge Better Dewatering Sludge
Effluent Fouled RO RO Acceptable Effluent
Long Term Fouling?? Long Term Abrasion??
7/31/2019 Carbon Enhanced MBRs
19/20
Summary
Conventional IWWP
Not Stable MBR & GAC Columns
Stable Operation
Fouling Problems PAC MBR
Stable Operation
No Fouling ProblemsEconomicalLower Cap & Op. Expenses
Abrasion
7/31/2019 Carbon Enhanced MBRs
20/20
Thank You