In co-operation with Green Solutions for the Mining Industry

Green Solutions for the

Mining Industry

Dr. Stephan Hüttmann

Harry Ylikangas

In co-operation with

Lab feasibility studies

Custom-maderemediation units

Groundwater flow modelling

Sensor basedEnvironmental monitoring

Molecular biology & Microbial site investigation

Direct image drilling technology

Microbial cultures & Bioaugmentation

Large scale In-Situ RemediationSite Investigation

Solution DesignImplementation

Long-term Operation

Range of Services

Introduction –In-Situ Remediation for contaminated soil- and groundwater

In-Situ Remediation• Injecting safe reagents to the

subsurface

• Triggers and accelerates a biochemical remediation process

• Groundwater quality to meet compliance standards

Applicability examples:• Nitrate, ammonium

• Sulphate

• Metals and metalloids

• Chemicals like Cyanide

Organics and inorganics

Introduction –In-Situ Remediation for contaminated soil- and groundwater

• Sensatec +300 projects track-record

o RSA partner AquaMatters key people decades in groundwater

• Successful in-situ remediation:

o Design: Solution specific data & multidisciplinary analyses

o Operation: Technology based on site characteristics

o Adjustability: On-time information by in-situ sensorsOn-time information and field access

Information flow Sensor monitoring borehole

Some Current Sensatec Customers • Airbus Helicopters• Augean Plc• AXA• Berlin Waterworks(BWB)• BP• Conoco• DEA• Daimler AG• Deutsche Bahn AG• Dow Chemical• Merck KGaA• Municipality of Berlin• Municipality of Hamburg• RWE• Shell• Siemens AG• Vattenfall• Vivo Energy• Volkswagen AG• Zeiss AG• AngloGold Ashanti (Tanzania)• DPMT Tsumeb (Namibia)

About 150 ongoing projects

Case Example –Implementation of a Large Scale Biobarrier in Berlin, Germany

Site: Berlin, GermanyClient: Berlin Water Works (PPP)Year: 2005 – ongoingProblem: Ammonium, Nitrate, Iron

ScopePermeable in-situ remediation barrier, automated process control, monitoring• 900m barrier width• Aerobic/Anaerobic remediation process

Capacity: 30 000 m³ per dayO&M: < EUR 0.06 per m3

Iron concentration in gas curtain

Case Example –Chromium immobilization barrier in Bochum, Germany

Tota

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Tot Cr [mg/l]Oxygen [mg/l]

Nitrate [mg/l]

Site: Bochum, GermanyClient: CDM SmithYear: 2016 – ongoingProblem: Chromium VI, Sulphate,

NitrateScopeCirculation well installations, mobile injection unit, ongoing process monitoring and control• Anaerobic remediation process

Capacity: 1 200 m³ per dayO&M: < EUR 0.15 per m3

Case Examples –Mine water contaminated groundwater in Africa

Site: Tsumeb smelter, NamibiaClient: Dundee Precious Metals TsumebYear: 2020 –Problem: Elevated Arsenic

ScopeDesign and POC Study to prepare for an implementation of a permeable ISR barrier to stop plume from advancing• Readiness achieved to proceed for implementation

Capacity: TBCCosting: TBC

CISR container unit

Monitoring• Sensors / manual• On-time data to devices

In-Situ Remediation • Injection borehole gallery

Proposed solution

Case Examples –Mine water contaminated groundwater in Africa

Site: Geita Gold Mine, TanzaniaClient: AngloGold AshantiYear: 2020 –Problem: Occasionally elevated Sulphate

ScopeDesign and POC Study to prepare for an implementation of a permeable ISR barrier • Readiness to proceed to solution design and

implementation

Capacity: TBCCosting: TBC

SOURCE

Proposed solution

How do we work – No Regret Process

Team work:• In close co-operation with client, consultants and the

regulator

Phased Approach:1. Desktop analysis

2. Design and Proof of Concept Study• Multidisciplinary data collection

• Geological, Hydrogeological• Geochemical, Microbiological

• Lab- and field POC (qualitative)

3. Solution Engineering Design• Hydrogeological, biotechnical, geochemical aspects

4. Solution Detail Engineering and Construction• Plant design, automation

5. Implementation• Operations and maintenance• Biological and chemical monitoring• Adjustments to changing conditions

Aeromagnetic data DGPS data

Geophysical data

Examples of multidisciplinary data collection

Hydrogeolocial data

Microbiological toxicity data Onsite parameters

1. Direct Sensing Technology

2. Contaminant Identification in-situ

• BTEX, chlorinated solvents, Phenols

• Precious metals, REE, Heavy metals

3. EC-logs / CPT / Soil Structure

4. Hydraulic Profiling Tool

Value adding services for mining

CPTU

• Penetration resistance

• Friction

• Pore water pressure

Multi parameter probe:

• Analysis of metal concentrations in-situ AND;

• Soil classification

Direct Image Drilling Technology

MPT – Metal profiling took technology

1. Multivariant statistical analyses• Identification of element concentrations

2. Extraction of core samples from relevant areas

3. Lab analyses of bioleaching

4. 3D – modelling and visualization• Geometry and valuables concentrations

Value adding services for mining

THANK YOU FOR YOUR ATTENTION!

ANY QUESTIONS?

MORE INFORMATION?

Sensatec GmbH

Remediation and

sensor technologies

Headquarter

Friedrichsorter Str. 32,

24159 Kiel, Germany

Tel. +49 (0431) 389009-0

[email protected]

www.sensatec.de

CONTACT SOUTH AFRICA

AquaMatters (Pty) Ltd

Harry Ylikangas

Pretoria, South Africa

Tel. +27 (71) 266-4516

[email protected]

• Since 2005

• > 300 successful projects track-record

• Full multidisciplinary team in-house

• Implementations in Europe, Asia and Africa

➢ Many in mining and processing industry