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Title: Analysis of membrane distillation crystallization system for high salinity brine treatment with zero discharge using Aspen flowsheet simulation
Authors: Wang, Rong
Wicaksana, Filicia
Yang, Xing
Fane, Anthony Gordon
Guan, Guoqiang
Keywords: DRNTU::Engineering::Environmental engineering::Water treatment
Issue Date: 2012
Source: Guan, G., Wang, R., Wicaksana, F., Yang, X., & Fane, A. G. (2012). Analysis of membrane distillation crystallization system for high salinity brine treatment with zero discharge using Aspen flowsheet simulation. Industrial & engineering chemistry research, 51(41), 13405-13413.
Series/Report no.: Industrial & engineering chemistry research
Abstract: An environmentally friendly membrane distillation crystallization (MDC) system is proposed to treat high salinity reverse osmosis (RO) brine with zero discharge. The raw brine from RO desalination plants is concentrated in direct contact MD to produce pure water, and the concentrate is then crystallized to produce solid salts without secondary disposal. A comprehensive analysis on the MDC system has been performed by Aspen flowsheet simulation with a user customized MD model, which was verified by our previous experiments. Simulation results reveal that the total energy consumption is negligibly changed by integration of a crystallization unit into the system, as over 97.8% of the energy was consumed by the heater of the MD subsystem. Higher inlet temperatures of both the feed and permeate streams in the MD module can improve the thermal efficiency. The introduction of a heat recovery unit in the MDC system, to recover the heat in the permeate for feed preheating, can increase the gain output ratio (GOR) by 28%. Moreover, it is shown that in a hollow fiber MD module, the permeate yield is a linear function of the length-to-radius ratio of the membrane module, and a longer MD module can reduce the specific energy consumption. A relatively high feed flow rate is preferred to avoid the potential problem of crystal blockage in the MD module.
DOI: 10.1021/ie3002183
Schools: School of Civil and Environmental Engineering 
Rights: © 2012 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by Industrial & Engineering Chemistry Research, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI:].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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