2022 Stanković, Velizar Gorgievski, Milan Božić, Dragana Bogdanović, Grozdanka info:eu-repo/semantics/article Keywords: biosorption, biomass combustion, green energy, heavy metal ions, mine water. Ključne reči: biosorpcija, sagorevanje biomase, zelena energija, joni teških metala, rudnička voda. Chemical Industry & Chemical Engineering Quarterly volume: 28 number: 4 startpage: 255 endpage: 264 eng Abstract: A new process for mine water purification has been proposed, based on biosorption followed by burning the loaded biosorbents. Wheat straw and sawdust of trees are convenient as biosorbents in the proposed process. Biosorption was performed in two stages: a cross-flow regime between the mine water and the biosorbent. The achieved copper adsorption degree was > 95%. Based on the mine water volume and its chemical composition, the estimated amount of the biosorbent was 60.000 t/year. The cogenerative mode of the loaded biosorbent combustion was considered for green energy production. For the recovery of metals concentrated in the ash, they must be processed separately. Several possibilities for ash processing were proposed and discussed. For an annual volume of mine water and the copper content in it, the mass and energy balances of the process were estimated, giving some economic data on the process efficiency. The analysis of the revenues and costs, based only on the energy value produced by the combustion of the biosorbent, has shown that the process can economically be viable regardless of the value of the recovered metal. Apstrakt: Predložen je novi proces za prečišćavanje voda rudnika bakra, koji bazira na objedinjavanju dva procesa – biosorpciji iza koje sledi proizvodnja energije sagorevanjem zasićenog biosorbenta. Pšenična slama i trina dobijena mlevenjem sečke drveća se već koriste kao biomasa u proizvodnji energije, a pokazali su i dobre adsorpcione osobine prema jonima bakra. Proces obuhvata biosorpciju, koja se izvodi u dva stupnja, u unakrsnom režimu tokova faza, čime se postiže stepen adsorpcije jona bakra > 95 %. Za razmatranu količinu rudničke vode i njen hemijski sastav, bilo bi potrebno oko 60.000 t/god biosorbenta. Analizirano je sagorevanje ove količine zasićenog biosorbenta i kogenerativna proizvodnja zelene energije, pri čemu bakar i ostali adsorbovani teški metali bivaju koncentrisani u pepelu, koji treba da se posebno procesira. Nekoliko mogućnosti prerade pepela, radi dobijanja bakra, su predložene i razmatrane. Procenjen je takođe bilans mase i energije predloženog procesa, za tretman određene godišnje zapremine rudničke vode i dobijanja bakra koji ona nosi. Uz to, dati su neki ekonomski pokazatelji efikasnosti procesa, bazirani na procenjenim prihodima i troškovima procesa. Ekonomska analiza je pokazala da bi proces bio održiv čak i samo na bazi energije proizvedene sagorevanjem biosorbenta, te da dobijeni metal predstavlja dodatni prihod, pri čemu je emisija CO2 gotovo jednaka nuli što, pored prečišćene vode, dodatno doprinosi čistijoj okolini. https://unilib.phaidrabg.rs/o:5961 doi:10.2298/ciceq210617037s cobiss:138168841 ISSN: 1451-9372 Mine waters purification by biosorption coupled with green energy production from wood and straw biomass Biosorpcija jona teških metala iz rudničkih voda na slami i trini i dobijanje zelene energije sagorevanjem tako zasićene biomase application/pdf 373555 bytes http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode