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Advanced Organics Removal for Water & Wastewater Treatment

29th March 2017

UK Onshore Oil & Gas

Birmingham City Centre

Introduction

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By 2030 demand is going to outstrip supply by 60% - significant pressure to change

Source: McKinsey & Company: 2030 Water Resources Group

Arvia Technology

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• Arvia’s technology is a Paradigm shift – cost effectively

• Reducing fresh water contamination - improving discharged water

quality

• Increase the percentage of water that can be reused

• Allowing historically un usable source water to be used

NyexTM – An Adsorbent & Electrode

Adsorption

Energy efficient, trace level, organics destruction with no secondary

waste

Electrochemical Oxidation

• Concentrates organics on a surface

• Achieves low discharge consents

• Destruction of recalcitrant organics

• Chemical free, onsite operation @

room temperature and pressure

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Arvia Organics Destruction Cell (ODC™)

Arvia Organics Destruction Cell (ODC™)

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(video of the process http://bit.ly/1QMAc5A)

ODC™ Benefits

• Energy used proportional to the organics destroyed

• The lower the concentration of organics the more cost-effective!

• No toxic by-products or sludge

• Chemical free and environmentally friendly

• Modular and scalable design

• Low maintenance and minimal operator input

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ODC™ Building Blocks

Single Module ODC 22-100

Flow (Up to) 13,200 L/hrs

Max Inlet COD 2,000 ppm

Typical Operating Current 50 Amps

Expected Operating Voltage 35 - 75 Volts

Foot print 1.2 m x 0.7 m

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Market Positioning

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10

100

1000

10000

0 25 50 75 100

CO

D (

pp

m)

Flow rate (m3/hr)

Biological

Incineration

O3 + H2O2

Wet Air Oxidation

Wet Air Oxidation & Biological

Fentons & Biological

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Case Studies

Refinery wastewater

• Treatment of oil refinery waste

• Removing PTA Purified Terephthalic Acid to meet stringent regulations

• Effluent required treatment of 20ppm COD

• Lab trial showed treatment result achieved

COD in (ppm) COD out (ppm)

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Coal to Gas Wastewater

• Biological wastewater treatment does not achieve permit levels

• COD polishing target of 80 mg/l achieved

• 40% COD removed with energy consumption 20.4 kWh/kg COD

• Scope to improve this value towards theoretical maxima of 8 kWh/kg COD optimising cell

configuration

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80

90

100

110

120

130

140

0 2 4 6 8 10

CO

D (

pp

m)

Time (hrs)

Preferential Treatment of Chemicals

0

0.0002

0.0004

0.0006

0.0008

0.001

0.0012

0.0014

Sample 1Initial

Sample 2 24 hr Sample 3 48 hr Sample 4 72 hr Sample 5 96 hr

Aq

. Co

nc.

mg/

kg

HxCDDs

HxCDFs

PeCDDs

PeCDFs

TCDDs

TCDFs

RCRA Limit

Dioxin and Furans Removal: Selective treatment delivered

despite high background organics (77,500 ppm COD)

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Water Reuse

• Water from Singapore utility treating Reverse Osmosis reject

• Total Organic Concentration (TOC) in reject water was still high at 23.7 mg/l

• Treatment target of below 5 mg/l of TOC was achieved

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Summary

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• Arvia’s system combines the advantages of adsorption and electrochemical oxidation

in a single system

• Delivers removal of trace level organics; including COD, micro-pollutants and colour

• Helps achieve regulatory targets and water reuse

• Achieves this with no secondary waste or chemicals used

Thank youwww.arviatechnology.com

E-mail: info@arviatechnology.com

Tel: +44 (0) 1928 515 315

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Additional Case Studies

Aqueous Hospital Waste

Treatment Issue:

• Aqueous wastes generated by hospital activities were

being high temperature incinerated (HTI)

• Low calorific value of the waste meant that it was a poor

candidate for incineration

• An alternative disposal method was necessary

Treatment & Performance Summary:

• The Arvia ODC delivered required COD removal

• Treatment was shown to require 8-12 kWh/kg COD

• Treatment cost varied according to the organic content

of the waste

• ROI in less than 12 months

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Description COD (mg/L)

CODRemoval

Waste 1 882 ≥ 95%

Waste 2 7150 ≥ 95%

Waste 3 26000 ≥ 95%

Colour Removal from Beverages

What happens to the colour of Coca Cola when treated in Arvia’s lab system?

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0

1000

2000

3000

4000

5000

6000

7000

8000

0 5 10 15 20 25 30 35 40

Pt-

Co

Time (hours)

Coca Cola treatability trial (colour)

Removal of Dye Penetrant

• Heat exchange manufacturer currently trucking batches of

wastewater

• Arvia has provided on-site wastewater treatment eliminating

trucking costs

• Arvia provides a return of investment within two years

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Feed from secondary clarifier

• Colour Reduction over 80%

• COD Reduction 20%

• Energy for regeneration 0.5 kWh/m3

• Treatment of warm wastewater (approximately 30oC)

for re-use, reducing water heating requirements by

nearly 25oC (min 29 kWh/m3)

Pulp & Paper Lignin

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Micro-pollutants in Wastewater

• Pilot plant as part of UK Chemical Investigation Programme

• Measuring for removal of EU Water Framework Directive priority

substances

• Key operational parameters:

o Treatment rate: 600 l/hr

o Energy consumption: 0.6 kWh/m3

o Treatment target: parts per billion level

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Micro-pollutantLab System

Removal efficiency (%)Pilot plant

Removal efficiency (%)

Diclofenac 97 92

Ibuprofen 88 81

Ciprofloxacin 96 84

EE2 100 96

Benzo(a)pyrene 100 92

Tributyltin 96 72

Carbamazepine 97 60

Triclosan 95 68

*Un-optimised pilot plant

Micro-pollutants in Drinking Water

• Metaldehyde is a persistent pesticide used extensively in rape seed farming and avoids

treatment through conventional water treatment facilities

• EU drinking water standards are 0.1 ppb

• 200+ plants fail EU standards in UK

• Trial results showed 96% removal of metaldehyde from water (Pilot plant Feb 2017)

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• Treatment of upland surface waters for 5-200

population centres

• Colour removal ~92%

• The treated water samples were visibly clear

Small Rural Water Treatment

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50

100

150

200

250

0 2 4 6 8 10 12 14 16

Pt-

Co

Time (hours)

Pt-Co

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• Treatment of cleaning wash water from a dry manufacturing process

• COD in raw feed was 510 mg/l and achieved discharge consent of 40mg/l

• Colour initially 664 Pt-Co and reduced to 30 Pt-Co

Tea Wash Water

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