โ Scribed by Bernt Ericsson; Bengt Hallmans
No coin nor oath required. For personal study only.
Some Polish coal mines are reviewed with respect to the disposal of saline wastewater into rivers and its environmental impact. The drainage water from mines has a daily contribution of, in the order of magnitude, 6,500 tons chlorides (Cl-) and 0.5 tons sulphates (SOd2-) to the rivers Wisla and Odra. The river Wisla contributes to about 55 % of the water resources in Poland. This report is based on a part of a commission for the Ministry of Environmental Protection, National Resources and Forestry of Poland by COWLVBB VIAK joint venture.
Different treatment and disposal schemes are described and compared from a technical-economical point of view, out of which methods for desalination with zero discharge as well as deep well injection are the most promising ones.
The desalination methods include reverse osmosis (RO) plant, thermal powered desalination and crystallization plant as well as facilities for dewatering and drying of sodium chloride (NaCl) to be sold in Poland and/or on the export market. The valuable main products are potable water, boiler feed water and sodium chloride. A special problem in this connection may be the radioactivity in the wastewater from some of the mines. Special treatment methods for radioactivity removal in the selected treatment and disposal scheme for the mine wastewater are discussed with respect to the effects of radioactivity on the saleability of the recovered salt.
๐ SIMILAR VOLUMES
The drainage water from mines in Poland has a daily contribution of, in the order of magnitude, 6,500 tons of chlorides and 0.5 ton of sulphates to the rivers Vistula (Wisla) and Oder (Odra). The largest amounts of these salts, about 78%, derive from 18 mines located mainly in the Katowice mine dist
A short evaluation of the development of desalination from standpoint of waterresources;protection is presented, A few cases ofmanagemexit,disposal or utilizatioxi of saline mine tiaters are discussed.
Eflvifonment (pollution, health protection, safety) 97102376 Recultivation of a tailings dump from brown coal open-pit mining Toth. S. ef ul. Agrokem. Tdaltan, 1995, 44, (X-4). 552-556. (In Hungarian) Reclamation of a tailings dump when inner area was seeded with crops and the outer area reforested