Water Treatment

Innovative Treatment of Acid Mine Drainage-The VitaSOFT Process

Nirvashnee Seetal
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Started by Nirvashnee Seetal on
30 Jan 2015 at 03:09
Manager: Water Technologies Demonstration Programme, Water Research Commission
Know-how: Project Execution, IP and Technology Licensing, Creativity, Innovation, Business Modelling, Technology Demonstration, Innovation
Technology

The VitaSOFT process integrates four biological processes with various chemical processes in order to treat acidic sulphate and metal containing wastewaters, achieving water quality of potable standard.

Sulphates are removed in an active biological sulphate reducing (BSR) process where sulphides and alkalinity are generated, making use of a carbon source such as primary sewage sludge or maize silage. These are used for the precipitation of heavy metals in the feed water, specifically iron.

The remaining sulphides are removed biologically through biological sulphide oxidation to form elemental sulphur, and chemically through iron hydroxide precipitation to form iron sulphide.

Iron sulphide is oxidised in a biological iron oxidising process, regenerating iron hydroxide for use in the sulphide precipitation reaction. A constant source of iron hydroxide is therefore not necessary.

Sufficient alkalinity is generated biologically in the process to remove all the original calcium in the AMD as calcium carbonate after the biological sulphide oxidation process without the addition of an external source of lime. Additional lime is required only for the removal of manganese and magnesium.

The final effluent is polished biologically in a trickling filter for discharge to the environment or for industrial reuse. Alternatively, it can be treated further in a reverse osmosis system to produce ultra pure industrial water or potable water.

To read more visit: http://www.wader.org.za/demo1.php

 

Industry Tags: 
  • WaterTechnologyIndustrial Water Treatment
  • WaterTreatmentBiological Treatment
  • WaterTreatmentIndustrial Wastewater Treatment

Comments

Nirvashnee Seetal
Hi Leonardo
The short answer is yes! The longer answer is that the nature of the organic material, whether it is biodegradable or not, is a determining factor. The “BOD charge” suggests that it is biodegradable.
The actual composition of the metals are also important. For example, there is an indication that molybdenum is very toxic to sulphate reducing bacteria. One can therefore only make an informed statement after looking at various factors.
Leonardo Zanata
Hello Nivarshnee..., do you think this process may be used in regular industrial eflluent, whit BOD charge, Sulphates and metals as well?

tks! Leo.
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