HomeMy WebLinkAbout04.b. (Handout) Marathon Presentation (Handout)
Item 4.b.
PRELIMINARY EVALUATION OF POSSIBLE DISCHARGE OF
VARIOUS STREAMS OF MARATHON MARTINEZ REFINERY
TO CENTRAL SAN WASTEWATER TREATMENT PLANT
Jean-Marc Petit, Director of Engineering &Technical Services
Real Estate, Environmental, and Planning Committee Meeting
SEPTEMBER 21, 2020
MARATHON PROJECT TIMELINE
• Received request from Marathon to potentially discharge industrial waste to Central San
• Met with Marathon Refinery Representative on 9/3/20 videoconference call
• Follow up correspondence regarding industrial waste discharge permit
• Issued task order to HDR under As Needed Treatment Plant to evaluate impact of various strength on
existing WWTP
• Follow up meeting with Marathon afternoon of 9/21/20
Finalizing
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Applications 8 of Approvals to Capacity online at
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MARATHON MARTINEZ FACILITY
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Renewable Diesel
,To PTU
Corn Cil
Renewable biodiesel is a drop-in for fossil diesel. Renewable is fully de-oxygenated
and considered superior to biodiesel.
PTU: Pre-Treatment Unit _ ` s
POSSIBLE DISCHARGE STREAMS PROVIDED BY
MARATHON MARTINEZ REFINERY
Conceptual Wastewater Stage 1:New WWTP Stage 2:Existing WWTP
Treatment Alternatives I— — — — — — — — — — — - '— — — — — — — I
2 Recovered Oils/Fats
I I
IF: II
%..l...... 1A 4
I
FlotationDissolved Air
...... 3
. IMoving Bed
I I
IBiofilm. ReactorII I
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2
PRELIMINARY WATER QUALITY OF VARIOUS STREAMS
PROVIDED BY MARATHON MARTINEZ REFINERY
Stream 1 and 1A Stream 3 Stream 5
Flowrate gpm 350-400 350-400 350-400
COD mg/L 12,000—15,000 TBD TBD
COD Ib/d 50,000-72,000 TBD TBD
BODS mg/L 5,000—7,500 TBD TBD Estimate based on a 0.5 BOD:COD ratio
(awaiting lab data)
BOD5 Ib/d 21,000-36,000 TBD TBD
TSS mg/L >200 <50 TBD Nearly 100%are volatile
Oil and Grease -- TBD <50 TBD
pH S.U. 3-4 7-8 7-8 Could be adjusted
(Ammonia
mperature OF 135-180 90 TBD Could be reduced(if needed)
hophosphate mg P/L 200-300 TBD TBD
al Phosphorus mg P/L 200-300 TBD TBD
mgN/L 50-75 TBD TBD
N mg N/L 200-400 TBD TBD s
SAN
CFNTPAI
OBJECTIVES OF PRELIMINARY EVALUATION
1. Evaluate the capacities of Central San treatment plant processes based upon the
simulation (BioWin Modeling) and current operation of the treatment plant
performance
2. Evaluate the impact on Central San treatment plant processes with the addition of the
Steam 1 (Stream 1 is of high BOD load stream) of Marathon Martinez Refinery
3. Evaluate the impact on Central San treatment plant processes with the addition of the
Steam 5 (Stream 5 is assumed to be of similar wastewater quality as of Central San
wastewater influent) of Marathon Martinez Refinery
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3
BIOWIN MODELING IS PERFORMED TO DETERMINE
POSSIBLE DISCHARGE OF VARIOUS STREAMS OF
MARATHON MARTINEZ REFINERY
Model Calibration
Calibration Runs Capacity Curves
Historical Flows and
Loads(2017-2019+)
.......:..................:...................i;........,........................
r Z
Mixed Liquor Suspended Solids
Solids Loading Rates
WAS, PSL,Cake
Oxygen Demand
Others
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CENTRAL SAN HISTORICAL FLOWS AND LOADS (2017-2019)
Averaging Period
Average Dry Weather Flow 35 246 296 37 0.3 8.7
(Assume it is July-Sept.)
Max Month for Dry Season 38 252 305 37 0.3 7.3
(May-Sept.)
Average Annual 40 203 253 32 0.3 6.3 Suggest using Average Annual for this
iteration(most typical levels)
Max Month for Year Round 57 255 305 38 0.3 7.7
*Data limited to 2019 intensive sampling (based on PE samples which are anticipated to be similar to raw influent)
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STREAM 1 IS OF HIGH BOD LOAD STREAM & STREAM rJ IS ASSUMED TO BE OF SIMILAR
WASTEWATER QUALITY AS OF CENTRAL SAN WASTEWATER INFLUENT
. .
I® Stream 5CMatch Central San Infl
Flowrate gpm 400 400
COD mg/L 15,000 406 MBBR:Mainly BOD reduced;5C based on a 0.5 BOD:COD ratio
COD Ib/d 72,000 --
BOD5 mg/L 7,500 203 Estimate based on a 0.5 BOD:COD ratio(awaiting lab data).
HDR anticipates a lower ratio(e.g.,0.25)
BOD5 Ib/d 36,000 --
TSS mg/L 500 253 Nearly 100%are volatile;MBBRs grow volatile solids
Oil and Grease -- TBD Central San Infl
pH s.u. 3-4 7.5 Could be adjusted
Temperature OF 135 90 Could be reduced(if needed)
Orthophosphate mg P/L 300 --
Total Phosphorus mg P/L 300 -- Based on TSS;negligible removal in MBBR
Ammonia mg N/L 75 32 MBBR convert organic N to Ammonia
NOx mg N/L - --
TKN mg N/L 400 48 Based on a 0.67 ammonia:TKN ratio for 5C
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CENTRALSAN
QUESTIONS?
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