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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
l Ch
rom
ium
Oxy
gen
/ N
itra
te c
on
ten
t
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
www.sensatec.de
CONTACT SOUTH AFRICA
AquaMatters (Pty) Ltd
Harry Ylikangas
Pretoria, South Africa
Tel. +27 (71) 266-4516
• Since 2005
• > 300 successful projects track-record
• Full multidisciplinary team in-house
• Implementations in Europe, Asia and Africa
➢ Many in mining and processing industry