(381aj) Effect of Organic Matters on the Fractional Crystallization Process of High-Saline Wastewater from Coal Chemical Industry | AIChE

(381aj) Effect of Organic Matters on the Fractional Crystallization Process of High-Saline Wastewater from Coal Chemical Industry


Bian, C. - Presenter, East China University of Science and Technology
Chen, H., East China University of Science and Technology
Song, X., East China University of Science and Technology
Yu, J., East China University of Science and Technology
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layout-grid-mode:char"> 125%;mso-fareast-font-family:ËÎÌå;mso-fareast-language:ZH-CN">Effect of organic
matters on the fractional crystallization process of high-saline wastewater
from coal chemical industry

Chao Bian, Hang
Chen†¡ì, Xingfu
Song* font-family:" times new roman zh-cn>†‡¡ì " times new roman zh-cn>, Jianguo Yu font-family:" times new roman zh-cn>†

layout-grid-mode:char"> mso-fareast-font-family:" ms pgothic>† State Environmental Protection Key Laboratory of Environmental
Risk Assessment and Control on Chemical Process and National
Engineering Laboratory for Industrial Wastewater Treatment, East China
University of Science and Technology, Shanghai 200237, China

layout-grid-mode:char"> mso-fareast-font-family:" ms pgothic>¡ì Shanghai Institute of Pollution Control and Ecological Security,
Shanghai 200092, China

*Corresponding author: " ms pgothic>xfsong@ecust.edu.cn


char"> minor-fareast;mso-fareast-language:ZH-CN">High-saline wastewater from coal chemical industry contains a large amount of inorganic
salts and complex organic matters. The direct emission can cause the pollution of environment and the waste of resources ËÎÌå;mso-fareast-language:ZH-CN">. As a result, the
treatment of high-saline wastewater from coal chemical industry has become an
urgent problem to be solved in China. ËÎÌå;mso-fareast-language:ZH-CN"> µÈÏß;mso-fareast-theme-font:minor-fareast">The zero discharge technological
requirement with the core concept of fractional crystallization attracted wide attentions µÈÏß;mso-fareast-theme-font:minor-fareast">, which not only concerns on the water
treatment but also focuses more on the recycle of the dissolved inorganics.

char"> ZH-CN">The typical inorganic system is Na+//Cl-,
SO42-, NO3--H2O. Till
now, a series of researches on the thermodynamics of the quaternary system and
its subsystems have been reported1-5. mso-bidi-font-weight:bold">Based on the abundant thermodynamic data, the
fractional crystallization process was designed and optimized. As shown in Figure 1, " ms pgothic>Na2SO4, Na ZH-CN">Cl and NaNO3 can be successively recycled from the system Na+//Cl-, SO42-, NO3--H2O by the integration of pretreatment, membrane concentration and
fractional crystallization.


layout-grid-mode:char">Figure 1 " ms pgothic>. The schematic diagram of the treatment
process mso-fareast-font-family:" malgun gothic>

line-height:125%;layout-grid-mode:char"> µÈÏß;mso-fareast-theme-font:minor-fareast;mso-bidi-font-weight:bold">A kind of
practical high-saline wastewater of coal chemical plant was treated according
to the route. The analysis results indicate that the purity of all products
meet the index of industrial salt. And the corresponding SEM pictures were
established in Figure 2. However, the concentration of COD in the products is
about 300 mg/L, which has certain restrictions on the subsequent application of
the products. mso-ansi-language:EN;mso-fareast-language:ZH-CN">Moreover, the organic matters
in the wastewater were continuously enriched during the crystallization
process, which may affect the fractional crystallization process, thereby
influencing the morphology and quality of the products. Therefore, it is
necessary to investigate the effect of organic matters on the crystallization
process and clarify the influencing mechanism between organic matters and inorganic


.5gd;text-align:center;line-height:125%;layout-grid-mode:char"> line-height:125%;mso-fareast-font-family:ËÎÌå;mso-fareast-language:ZH-CN">Figure 2. ËÎÌå;mso-fareast-language:ZH-CN"> The SEM pictures of production (a-Na2SO4,
b-NaCl, c-NaNO3)

1.0;line-height:125%;layout-grid-mode:char"> ËÎÌå;mso-fareast-language:ZH-CN">Morphological prediction of the pure crystals
was realized by AE model ËÎÌå;mso-ansi-language:EN;mso-fareast-language:ZH-CN"> using Materials Studio, as
shown in Figure 3. The influencing mechanism of some different types of organic
matters on the products will be studied further through the combination of
experiment and simulation. The research results will provide a theoretical
basis for improving the product quality and optimizing the flowsheet.

.5gd;text-align:center;line-height:125%;layout-grid-mode:char"> mso-no-proof:yes">




text-indent:0cm;mso-char-indent-count:0;line-height:125%;mso-list:l0 level1 lfo3;
layout-grid-mode:char"> 10.5pt;line-height:125%;mso-fareast-font-family:" times new roman en>(a)      mso-ansi-language:EN;mso-fareast-language:ZH-CN">                       (b)                    

.5gd;text-align:center;line-height:125%;layout-grid-mode:char"> line-height:125%;mso-fareast-font-family:ËÎÌå;mso-fareast-language:ZH-CN">Figure 3. ËÎÌå;mso-fareast-language:ZH-CN"> Morphological prediction of the crystals by AE
model (a-Na2SO4, b-NaCl, c-NaNO3)

1.0;line-height:125%;layout-grid-mode:char"> normal">Keywords: high-saline
wastewater, fractional crystallization, organic matters, influencing mechanism,
ZH-CN">morphological prediction

1.0;line-height:125%;layout-grid-mode:char"> normal"> ZH-CN">Reference

1.0"> mso-fareast-theme-font:minor-fareast">[1] Lu, H.; Wang, J.; Yu, J.; Wu, Y.; Wang, T.; Bao, Y.;
Ma, D.; Hao, H., Phase equilibria for the pseudo-ternary system (NaCl+Na minor-fareast">2SO minor-fareast">4+H minor-fareast">2O) of
coal gasification wastewater at mso-fareast-font-family:µÈÏß;mso-fareast-theme-font:minor-fareast">T=(268.15 to 373.15) K. Chin. J. Chem. Eng.
2016, 25 (7), 955-962.

1.0"> mso-fareast-theme-font:minor-fareast">[2 mso-fareast-font-family:µÈÏß;mso-fareast-theme-font:minor-fareast">] Zhang, X.; Huang, X. L., Study on the
phase equilibria of the quaternary system Na+//Cl-, SO42-,
NO3-H2O at low temperatures. Huaxue Tongbao
2015, 78 (4), 337-341.

1.0">[3] Cao, J.; Ren, Y. S.; Zhu, Q. N.;
Ma, Y. L., Investigation of Solid¨CLiquid Equilibria on the Na+//Cl¨C, NO3¨C,
SO42¨C-H2O System and the Na+//NO3¨C,
SO42¨C¨CH2O System at 313.15 K. J. Chem. Eng. Data bold">2019, 64
(3), 1209-1221.

1.0"> mso-fareast-theme-font:minor-fareast">[4 mso-fareast-font-family:µÈÏß;mso-fareast-theme-font:minor-fareast">] Bian, C.; Chen, H.; Song, X.; Jin, Y.; Yu,
J., Stable phase equilibria of the quaternary system Na+//Cl¨C,
NO3¨C, SO42¨C-H2O at
353.15 K. J. Chem. Eng. Data 2018, 63 (9), 3305-3314.

1.0"> mso-fareast-theme-font:minor-fareast">[5 mso-fareast-font-family:µÈÏß;mso-fareast-theme-font:minor-fareast">] Yang, J.; Wang, Y.; Shu, M.; Yang, L.;
Zhu, L.; Zhao, X.; Sha, Z., Solid-liquid equilibrium of Na+//Cl,
NO3, SO42--H2O
quaternary system at 373.15 K. Fluid Phase Equilib. 2017, 445, 7-13.

1.0">[6] Dillon D. Effect of Organic
Modifier and Preparation Method on the Morphology and Crystalline Structure of
Poly(vinylideneflouride)-Montmorillonite Nanocomposites[J]. Aiche Journal,
2005, 42(4):1077¨C1087. mso-fareast-font-family:ËÎÌå;color:#040407;letter-spacing:-.05pt">