Concentrating and recycling of high-concentration printing and dyeing wastewater by a disc tube reverse osmosis-Fenton oxidation/low temperature crystallization process

2021 ◽  
pp. 118583
Author(s):  
Xinjun Jing ◽  
Junsheng Yuan ◽  
Daniu Cai ◽  
Bin Li ◽  
Dongliang Hu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Reverse Osmosis ◽  
Crystallization Process ◽  
Fenton Oxidation ◽  
Dyeing Wastewater ◽  
High Concentration ◽  
Printing And Dyeing Wastewater ◽  
Low Temperature Crystallization ◽  
Temperature Crystallization

Improved calcium sulfate recovery from a reverse osmosis retentate using eutectic freeze crystallization

2013 ◽  
Vol 67 (1) ◽  
pp. 139-146 ◽  
Author(s):  
D. G. Randall ◽  
R. Mohamed ◽  
J. Nathoo ◽  
H. Rossenrode ◽  
A. E. Lewis
Keyword(s):  
Low Temperature ◽  
Reverse Osmosis ◽  
Calcium Sulfate ◽  
Crystallization Process ◽  
Eutectic Temperature ◽  
Water Recovery ◽  
Recovery Rates ◽  
Low Temperature Crystallization ◽  
Operating Temperatures ◽  
Temperature Crystallization

A novel low temperature crystallization process called eutectic freeze crystallization (EFC) can produce both salt(s) and ice from a reverse osmosis (RO) stream by operating at the eutectic temperature of a solution. The EFC reject stream, which is de-supersaturated with respect to the scaling component, can subsequently be recycled back to the RO process for increased water recovery. This paper looks at the feasibility of using EFC to remove calcium sulfate from an RO retentate stream and compares the results to recovery rates at 0 and 20 °C. The results showed that there was a greater yield of calcium sulfate obtained at 0 °C as compared with 20 °C. Operation under eutectic conditions, with only a 20% ice recovery, resulted in an even greater yield of calcium sulfate (48%) when compared with yields obtained at operating temperatures of 0 and 20 °C (15% at 0 °C and 13% at 20 °C). The theoretical calcium recoveries were found to be 75 and 70% at 0 and 20 °C respectively which was higher than the experimentally determined values. The EFC process has the added advantage of producing water along with a salt.

Study of Very Low Temperature Crystallization Process in Ethylene/α -Olefin Copolymers

2009 ◽  
Vol 282 (1) ◽  
pp. 175-184 ◽  
Author(s):  
E. Tarasova ◽  
T. Poltimäe ◽  
A. Krumme ◽  
A. Lehtinen ◽  
A. Viikna
Keyword(s):  
Low Temperature ◽  
Crystallization Process ◽  
Low Temperature Crystallization ◽  
Temperature Crystallization ◽  
Very Low Temperature

Fabrication of Self-Aligned Aluminum Gate Polysilicon Thin-Film Transistors Using Low-Temperature Crystallization Process

1994 ◽  
Vol 33 (Part 1, No. 1B) ◽  
pp. 635-638 ◽  
Author(s):  
Eizo Ohno ◽  
Atsushi Yoshinouchi ◽  
Takeshi Hosoda ◽  
Masataka Itoh ◽  
Tatsuo Morita ◽  
...  
Keyword(s):  
Thin Film ◽  
Low Temperature ◽  
Thin Film Transistors ◽  
Crystallization Process ◽  
Low Temperature Crystallization ◽  
Temperature Crystallization

Thermographic Study of Elastomers III. Peculiarities of Crystallization of Natural Rubber

1967 ◽  
Vol 40 (2) ◽  
pp. 458-462
Author(s):  
B. Ya Teitel'baum ◽  
N. P. Anoshina
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Natural Rubber ◽  
Crystallization Process ◽  
Crystallographic Form ◽  
Sharp Difference ◽  
Thermographic Study ◽  
Low Temperature Crystallization ◽  
Temperature Crystallization

Abstract Thermographic (DTA) study reveals two independent melting regions of natural rubber crystallites and a gap between them which is determined by a sharp difference in the rates of the crystallization process. Crystallites formed at a low temperature (− 25° C) and at room temperatures are distinguished by the degree of development, but pertain to the same crystallographic form. High temperature crystals play the role of seed in low temperature crystallization. During the melting of low temperature crystallites of natural rubber, they recrystallize with a rise in the melting point (without reaching, however, room temperatures). The appearance of this phenomenon on the thermograms is determined by the relation between rates of crystallization and of heating in the course of the experiment. The rate of crystallization of natural rubber and the relative amount of crystallites formed at − 25° C were studied by DTA; the effect of rubber plasticization on these magnitudes was noted.

Photo-assisted low temperature crystallization of solution-derived LiCoO2 thin film

2021 ◽  
Vol 138 ◽  
pp. 111241
Author(s):  
Boseon Yun ◽  
Tan Tan Bui ◽  
Paul Lee ◽  
Hayeong Jeong ◽  
Seung Beom Shin ◽  
...  
Keyword(s):  
Thin Film ◽  
Low Temperature ◽  
Low Temperature Crystallization ◽  
Temperature Crystallization

scholarly journals Particle Size Distribution Based Occurrence Features of Organic Components in Printing and Dyeing Wastewater Under a Treatment Process

2019 ◽  
Vol 118 ◽  
pp. 04009
Author(s):  
Yuan Li ◽  
Jie Liu ◽  
Yibiao Yu ◽  
Hao Zhu ◽  
Zheng Shen ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Reverse Osmosis ◽  
Treatment Process ◽  
Dyeing Wastewater ◽  
Wastewater Treatment Process ◽  
Printing And Dyeing Wastewater ◽  
Sedimentation Tank ◽  
The Relationship

A more detailed occurrence features of organic matters in the printing and dyeing wastewater, based on its particle size distribution (PSD) and along with a wastewater treatment process, was conducted to provide a support for advanced treatment. Results suggested that, (1) In the dyeing wastewater, the occurrence characteristic of COD was: soluble>supra colloidal>colloidal>settleable; However, for protein, the supra colloidal was dominant, followed by the soluble. The feature of the polysaccharide was consistent with COD’s. In the wastewater, 29.66% of COD could be attributed to proteins and 3.45% of the COD could be attributed to polysaccharides. (2) The relationship among the forms of COD in the primary sedimentation tank, aerobic tank, secondary sedimentation tank, and reverse osmosis-treated concentrated effluent was consistent, that was: soluble>colloidal>supra colloidal>settleable. (3) In the primary sedimentation tank, the settleable COD was almost completely removed; In the aerobic tank, the residual super colloidal COD was not much; After MBR-RO treatment, the COD in the reverse osmosis concentrated water was almost dissolved and only a little presented in other forms.

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