DC Tillman AWPF Pilot Project Los Angeles Chapter WateReuse Meeting - - PowerPoint PPT Presentation

SLIDE 1

DC Tillman AWPF Pilot Project

Los Angeles Chapter WateReuse Meeting

October 10, 2017

Photo by Lindsay Blake

SLIDE 2

Alternative Advanced Treatment Trains for Pilot Evaluation

Alternative Advanced Treatment Train Alternative Advanced Treatment Train w/Side stream from RO

Limited side stream treatment from RO evaluated for the scenario where it is deemed necessary for meeting TDS or chloride limits:

SLIDE 3

Multiple ple t treatment trains t tested d to ide dentify o

• pt

ptimal appr pproach ch f for f full-sca cale le s system

DCTWRP AWPF Pilot System

Ful ull l Advanc nced T Treatment nt

• Membrane Filtration (MF)
• Two-Stage Reverse Osmosis (RO)
• Closed Circuit Desalination (CCD)
• Advanced Oxidation Process (AOP)

Alternative A e Advanced T ed Treatment

• Ozone
• Biologically Activated Carbon (BAC)
• Advanced Oxidation Process (AOP)
• Soil Columns (Soil Aquifer Treatment)

SLIDE 4

Alternative Treatment Results - Bromate

Pilot results indicate maintaining an

• zone residual under 0.8 – 1.0 mg/L

will prevent bromate formation

SLIDE 5

5

Alternative Treatment Results - NDMA

48% reduction from Tertiary Effluent Below Detection

SLIDE 6

Alternative Treatment Results – Bulk TOC

O3:TOC ratio = 0.7 ~25% removal O3:TOC ratio = 1.0 ~35% removal

SLIDE 7

• Soil Aquifer Treatment via soil columns
• Lowers TOC an additional 50-60% (65-75% overall)

Alternative Treatment Results – Bulk TOC

7

SLIDE 8

1,4-dioxane

Acesulfame K

Ateno lol

Azithromycin

Benzotriazole

Carbamazepin e

Cotinine

DEET

Dilantin

Diphenhydra mine

Estrone

Fluoxetine Gemfibrozil

Ibuprofen

Iopromide

Meprobamate

PFOA

PFOS 1,4-dioxane

Acesulfame K

Atenol

• l

Benzotria zole

Cotinine

DEET

Ibuprofen

Meprobamate PFOA

PFOS 1,4-dioxane

Acesulfame K

DEET

Meprobam ate

1,4-dioxane

Cotinine

DEET

Meprobamate

PFOA

PFOS

1,4-dioxane

Meprobamate

PFOA

PFOS

Primidone

Primidone Primidone

Primidone Primidone

Sucralose

Sucralose

Sucralose

Sucralose

Sucralose

Sulfamethoxazole

Sulfamethoxazole

TCEP TCEP

TCEP

TCEP

Triclosan

Trimethoprim

Alternative Treatment Results – CECs

Ozone BAC

TCPP

UV SAT

28 CECs detected in tertiary effluent 14 CECs detected after

• zonation

12 CECs detected after BAC 10 CECs detected after UV 8 CECs detected after SAT

SLIDE 9

The Remaining CECs

9

CEC O3 O3-BAC AC- UV UV-SAT AT NWRI Ad Advisory Leve vels lsa Health th Ad Advisory Colorado do Rive verd Rang nge (med median) State W Water Projectd Rang nge (med median) Raw Surfa face Wa Watere (95 (95th

th %)

%) 1,4-Dioxane 260

• 1,000b

Meprobamate 67 200,000

• 37

PFOA 27 400,000 70c

• PFOS

3.1 200 70c

• Primidone

11 10,000

• ND-25

ND-4 53 Sucralose 12,000 150,000

• 9,910

TCEP 66 5,000

• ND-71

ND-17 96 TCPP 330

• All units in ng/L. Median value from 3 rounds of testing.

a NWRI 2012, b California notification level, c EPA Advisory Level is 70 ng/L for the sum of

both PFOA and PFOS, d NWRI 2010, e Eaton and Haghani 2016

SLIDE 10

Biodegradable Organic Carbon: Ultimate Dissolved Organic Carbon

BDOC Bioreactor

SLIDE 11

SAT BAC Ozone Tertiary Treatment Product Water UV

Alternat nativ ive A Advanc anced Treatmen tment

Recommended Treatment Approach

• DCTWRP Phase 2 Pilot
• Alternative advanced treatment (O3-BAC-UV) provides

effective TOC removal and attenuation of CECs

• DCTWRP Full Scale Project
• Implement O3-BAC-UV for full scale use by 2023

SLIDE 12

• LA Sanitation
• Roshanak Aflaki
• Michael Ruiz
• Joline Munoz
• Slavica Hammond
• Farzaneh Shabani
• Brown and Caldwell
• Melissa Ingalsbe
• Wendy Broley
• Sunny Wang
• Trussell Technologies
• Shane Trussell
• Teresa Venezia

Acknowledgements

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And Many More!

SLIDE 13

Thank you.

Questions?