BIOENERGY FOR MINES

RECLAIM TO REMEDIATE

 

Rehabilitation 

Returning a disturbed environment to a socially, economically and environmentally acceptable condition which is similar to its original condition or better.

Reclamation

Implementing processes to return the land to a sustainable useable condition.

 

Mine impacted land has very little or no economic value as it is not suitable for food or feed crops and it negatively impacts on the environment as follows;

  • Reduction of landscape & visual amenity
  • Impacts on receiving environments such as land, air, surface water and groundwater
  • Impacts on local flora and fauna
  • Impacts on health and hygiene of local populations.

 

Has the potential for legacy costs through future latent & residual impacts

  • Need to monitor & maintain the site
  • Prevent further point source pollution

 

Selectra’s strategy is RECLAIM to REMEDIATE in the belief that an effective reclamation programme will lead to remediation.

 

Our sustainable solution is to cultivate energy crops on impacted land. The application of Biocomplex, a completely natural bio-activator, promotes bioremediation which is aided by the energy crops taking up contaminants and heavy metals through a process call phytoremediation. These contaminants and heavy metals are deposited in the H2E Anaerobic Digester as a concentrated mineral sludge for further processing or disposal. High quality biogas is a by-product of the process and this energy source is deployed in the mine processing plant to displace higher cost fuels.

 

Key elements of Selectra’s approach are;

  • Selectra process
  • EKO GEA biological activation of plants and soils through application of Biocomplex natural bio-activator
  • Crop selection

 

 

 

 

 

 

EKO GEA BIOLOGICAL ACTIVATION

 

Biological activation of soils and plants is a critical step towards establishing the plantation. This is achieved by application of Biocomplex, a completely natural bio-activator that promotes bioremediation.

 

What It Is:

  • Pure Ascophyllum nodosum marine algae after a unique extraction process that maintains the essential characteristics in the mother plant.
  • Polyuronic acid that imparts natural ion exchange capacity Binds and sequesters heavy metals at a molecular level
  • Negatively charged and "offer" negative ions to cation (positively-charged) elements in the soil (Cadmium, Chromium, Copper, Lead, Nickel, Mercury, Zinc)
  • Promotes and rapid depolymerisation of organic substances

 

Oligosaccharides, the essential sugars that stimulate microbial activity, and a complete range of pro-biotic compounds, trace elements and micro-nutrients, that are chelated, colloidal, and optimally balanced for ready uptake by the plant.

 

How It Works:

EKO GEA's proprietary treatment:

  • Provides complex nutrients to soils and plants
  • Stimulates intensive root growth to better hydrate plants and enhance nutrient absorption
  • Conditions soil and increases water retention capacity Restores micro-climate - beneficial microbes which builds humus
  • Activates the natural compost cycle
  • Allows for better water and nutrient retention
  • Restores symbiosis thereby promoting the systemic health of the soil eco-system

 

 

Root Concentrate: Provides unique protection and growth stimulation during early growth.

Foliar Spray: A general treatment to stimulate plant growth in developing plants.

 

CROP SELECTION

 

Crops for mine impacted areas are selected for specific traits, which suit the site where they are to be utilised, and range from high input [water and fertiliser], high yield crops to low input, lower yield crops.

 

The goal is to select energy crops that can be cultivated in the harsh conditions associated with impacted land with key requirements of scalability, reliability, and consistency that results in inexpensive feedstock supply. This is achieved by crop selection using the following guiding principles;

  • Non-Food Crop – crops grown on impacted land can assimilate heavy metals and other contaminants
  • High Yields – in terms of dry matter (DM) yield
  • Low Operating Costs – low management intensity, can be easily planted & harvested
  • Hydrophobic – important for crops that need to be stored as the crop structure permits natural drying and ensiling
  • Suitable – must meet the requirements of the energy production pathway
  • Salt Tolerant (Halophyte) - tolerance to high salinity levels allows for growth on marginal land and irrigation with wastewater.
  • Resilient – tolerate extreme climate occurrences
  • Sterile – should not be invasive
  • Environmentally Beneficial - carbon neutral while not creating other environmental impacts

 

 

SELECTRA PROCESS

The Selectra Process is all about organisation of the biophysical aspects (the overlap of physical, chemical and biological aspects of the local environment) in the development of the Agronomic Strategy.

Selectra retains the services of DR Johan Van Tol of Hydropedological Solutions as lead consultant.

Copyright © 2014. Selectra. All rights reserved.   SELECTRA CC Reg No 1987/026411/23