TY - JOUR
T1 - Waste-water purification through a countercurrent system driven by supercritical carbon dioxide (SC-CO2). Part I
T2 - Experimental investigation and process evaluation
AU - Jan, Hsing San
AU - Wang, Wei Cheng
N1 - Funding Information:
This project was supported by the Ministry of Science and Technology, Taiwan , through grant 108-2221-E-006 -220 -MY3.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/7/1
Y1 - 2020/7/1
N2 - Wastewater purification has been considered to be a major cost not only for industries but also for society as a whole. Current technologies in the market are both costly and time consuming. This study proposed a supercritical CO2 (SCCO2)-driven countercurrent system for separating the emulsified oil from water (Case 1) and reducing the chemical oxygen demand (COD) from electroplating wastewater (Case 2). The effects of the operating parameters, including temperature, pressure and residence time/CO2 flow rate/CO2-to-feed ratio, were discussed. In addition, a design for recycling CO2 was developed for the purpose of saving CO2 costs. Taking commercialization into consideration, the process was scaled-up to 250 tonnes/day, and the recommended processing fee was $1.12/tonne for a payback period of 1.29 year, based on the process simulation and techno-economic analysis (TEA). Compared to the current process, this technology has advantages including that it is low cost, efficient, and most importantly, environmentally friendly.
AB - Wastewater purification has been considered to be a major cost not only for industries but also for society as a whole. Current technologies in the market are both costly and time consuming. This study proposed a supercritical CO2 (SCCO2)-driven countercurrent system for separating the emulsified oil from water (Case 1) and reducing the chemical oxygen demand (COD) from electroplating wastewater (Case 2). The effects of the operating parameters, including temperature, pressure and residence time/CO2 flow rate/CO2-to-feed ratio, were discussed. In addition, a design for recycling CO2 was developed for the purpose of saving CO2 costs. Taking commercialization into consideration, the process was scaled-up to 250 tonnes/day, and the recommended processing fee was $1.12/tonne for a payback period of 1.29 year, based on the process simulation and techno-economic analysis (TEA). Compared to the current process, this technology has advantages including that it is low cost, efficient, and most importantly, environmentally friendly.
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U2 - 10.1016/j.seppur.2020.116781
DO - 10.1016/j.seppur.2020.116781
M3 - Article
AN - SCOPUS:85081244029
SN - 1383-5866
VL - 242
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 116781
ER -