Mine Water Treatment
1:00pm - 1:25pm
Refurbishment Of Water Treatment Plant Borna-West – From Lab Over Pilot Scale To Operation Plant Modification
1G.E.O.S. Ingenieurgesellschaft mbH, Germany; 2Lausitzer und Mitteldeutsche Bergbau-Verwaltungsgesellschaft mbH, Germany
In this paper the refurbishment of the water treatment plant Borna-West in Germany is presented.
Experimental resulting from lab tests and a several months lasting on-site pilot test combined with the consideration for other necessary changes in plant operation. This led to the integration of an additional process step and a refurbishment of the plant, while ongoing operation.
1:25pm - 1:50pm
In-situ Hydrogen Peroxide Dosing Trials To Design Semi-Passive Treatment Schemes
The Coal Authority, United Kingdom
The oxidation kinetics of ferrous iron in coal mine water can be increased using hydrogen peroxide solution. To determine hydrogen peroxide demand the Coal Authority used desk top modelling based on a presumption that all mine waters had a similar behaviour for iron oxidation kinetics.
During the early stages of project design trials of hydrogen peroxide dosing were undertaken to study the behaviour in-situ of real mine water rather than in a laboratory with synthetic water. Both trials demonstrated the benefits of using actual mine water because it allowed for efficient and cost effective, semi-passive treatment schemes to be designed.
1:50pm - 2:15pm
Osmodialysis - the Future of Oil Production Water Treatment
fluvicon GmbH, Austria
With Osmodialysis, the Austrian company fluvicon GmbH has developed a continuously operating, extremely robust membrane process based on forward osmosis that is capable of cleanly separating oil and salt water. Fouling and scaling - the two major problems of membrane separation technology - play no role. That enables extremely long membrane service lives despite high oil loads and water hardness. The range of applications extends from the treatment of produced waters, condensate and seepage water in the oil and gas industry, to the purification of contaminated seawater after tanker accidents, shipwrecks and well disasters.
2:15pm - 2:40pm
Prevention of Siltation in Artisanal Small-scale Mining
1Kajaani University of Applied Sciences, Finland; 2Hangasojan Kulta Oy, Consulting company, Finland
Silting of waterbodies caused by sluicing in artisanal small-scale mining is a consquence of sluicing directly into receiving waterbodies. Silting lowers the acceptancy of mining activities by locals. Utilizing flocculants and/or coagulants in circulation ponds quickly reduces the amount of silt and colloids in the water. The flocculant can be applied with low-cost methods and the overall process is economical. The process has been tested in a 3-4 m3/h pilot in the Finnish Lapland.
2:40pm - 3:05pm
Mintek’s Integrated cloSURE(TM) Technology for Treatment of Acid Mine Drainage
Mintek, South Africa
Mintek has developed cloSURETM for treatment of AMD. The process consists of two stages, biological sulfate reduction followed by oxidation for sulfide removal and biosulphur production. The process was demonstrated at laboratory scale and achieved sulfate reduction rates of 196 g/m3/d with 87% sulfate removal, and up to 98% sulphide removal. The pH level increased to 7.5 and metals were found to be within South African target water quality limits for irrigation. The results of the research show that cloSURETM is a potential solution for sustainable treatment of point sources of AMD.