Study on the recovery of high salinity wastewater from zinc hydrometallurgy process
SEN Wei1, ZHANG Ying-jie1, DONG Peng1, SUN Hong-yan2
1. Key Laboratory of Advanced Battery Materials of Yunnan Province, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2. College of Science, Honghe University, Mengzi 661100, China
Abstract：In this paper, the experimental study on recovering high salinity wastewater from zinc oxide dust industry was carried out by the combination technology of "pretreatment for separating impurities-evaporation-salinity separation and crystallization". By adopting this technique, the results showed that the qualified production water, anhydrous sodium sulfate and sodium chloride were recovered respectively from the high salinity wastewater. The high salinity wastewater was recycled completely. After evaporation and concentration at high temperature (95~100), the anhydrous sodium℃ sulfate was crystallized from the neutralized wastewater, and the content was 98.79%, which reached to the quality standard of anhydrous sodium sulfate. The electric conductivity of condensed water obtained Ⅱ by evaporation is less than 48μS/cm, which reached to the standard of production water. At the last period of high temperature evaporation, the sodium chloride was concentrated in residual liquid. Then sodium chloride was crystallized when keep evaporating at low temperature (60), which was comprised of 83.82% NaCl.℃
森维, 张英杰, 董鹏, 孙红燕. 湿法炼锌高盐废水的综合回收实验研究[J]. 中国环境科学, 2018, 38(5): 1774-1778.
SEN Wei, ZHANG Ying-jie, DONG Peng, SUN Hong-yan. Study on the recovery of high salinity wastewater from zinc hydrometallurgy process. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(5): 1774-1778.
Lefebvre O, Moletta R. Treatment of organic pollution in industrial saline wastewater:A literature review[J]. Water Research, 2006,40:3671-3682.
[2]
Pernetti M, Dipalma L. Experimental evaluation of inhibition effects of saline wastewater on activated sludge[J]. Environment Technology, 2005,26:695-703.
[3]
Kim H C, Choi W J, Chae A N, et al. Evaluating integrated strategies for robust treatment of high saline piggery wastewater[J]. Water Research, 2016,89(1):222-231.
[4]
Bahar R, Hawlader M N A, Woei L S. Performance evaluation of a mechanical vapor compression desalination system[J]. Desalination, 2004,166:123-127.
[5]
Jorfiab S, Pourfadakarib S, Ahmadi M. Electrokinetic treatment of high saline petrochemical wastewater:Evaluation and scale-up[J]. Journal of Environmental Management, 2017,24:221-229.
[6]
Zejli D, Ouammi A, Sacile R, et al. An optimization model for a mechanical vapor compression desalination plant driven by a wind/PV hybrid system[J]. Applied Energy, 2011,88(11):4042-4054.
Pérez-González A, Ibáñez R, Gómez P, et al. Nanofiltration separation of polyvalent and monovalent anions in desalination brines[J]. Journal of Membrane Science, 2015,473:16-27.
[18]
Liang L, Han D, Ma R, et al. Treatment of high-concentration wastewater using double-effect mechanical vapor recompression[J]. Desalination, 2013,314(2):139-146.
[19]
Zhao D, Xue J, Li S, et al. Theoretical analyses of thermal and economical aspects of multi-effect distillation desalination dealing with highsalinity wastewater[J]. Desalination, 2011,273:292-298.
[20]
Ettouney H. Design of single-effect mechanical vapor compression[J]. Desalination, 2006,190(1):1-15.
[21]
Nafey A S, Fath H E S, Mabrouk A A. Thermceconomic design of a multi-effect evaporation mechanical vapor compression (MEE-MVR) desalination process[J]. Desalination, 2008,230:1-15.
[22]
Cacace D, Antonio R. Mechanical and thermal vapour recompression in liquid food concentration by evaporation[J]. Industria Conserve, 2003,78(2):183-193.
DiPippo M M, Sako K, Tester J W. Ternary phase equilibria for the sodium chloride-sodium sulfate-water system at 200 and 250 bar up to 400℃[J]. Fluid Phase Equilibria, 1999,157(2):229-255.
[26]
Marliacy P, Schuffenecker L, Solimando R. Vapor pressure and dissolution enthalpy measurements in ternary {H2O+NaCl+Na2SO4} system between 298K and 363K[J]. Journal of Chemical and Engineering Data, 2003,58(2):241-248.
[27]
Sirbu F, Iulian O, Ion A C, et al. Activity coefficients of electrolytes in the NaCl-Na2SO4-H2O ternary System from potential difference measurements at (298.15, 303.15, and 308.15) K[J]. Journal of Chemical and Engineering Data, 2011,56(12):4935-4943.
[28]
Lu H, Wang J, Yu J, et al. Phase equilibria for the pseudo-ternary system (NaCl+Na2SO4+H2O) of coal gasification wastewater at T=(268.15 to 373.15) K[J]. Chinese Journal of Chemical Engineering, 2017,25(7):955-962.
