Solar
Evaporator with Controlled Salt Precipitation
for Zero Liquid Discharge Desalination
Version 3 2018-10-20, 13:18
Version 2 2018-10-01, 18:25
Version 1 2018-10-01, 18:19
Posted on 2018-10-20 - 13:18
A sustainable supply of clean water
is essential for the development
of modern society, which has become increasingly dependent on desalination
technology since 96.5% of the water on Earth is salt water. Thousands
of desalination plants are producing massive waste brine as byproduct,
and the direct discharge of brine raises serious concerns about its
ecological impact. The concept of zero liquid discharge (ZLD) desalination
is regarded as the solution, but the current ZLD technologies are
hampered by their intensive use of energy and high cost. In this work,
a 3D cup shaped solar evaporator was fabricated to achieve ZLD desalination
with high energy efficiency via solar distillation. It produces solid
salt as the only byproduct and uses sunlight as the only energy source.
By rationally separating the light absorbing surface from the salt
precipitation surface, the light absorption of the 3D solar evaporator
is no longer affected by the salt crust layer as in conventional 2D
solar evaporators. Therefore, it can be operated at an extremely high
salt concentration of 25 wt % without noticeable water evaporation
rate decay in at least 120 h. This new solar evaporator design concept
offers a promising technology especially for high salinity brine treatment
in desalination plants to achieve greener ZLD desalination as well
as for hypersaline industrial wastewater treatment.
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Shi, Yusuf; Zhang, Chenlin; Li, Renyuan; Zhuo, Sifei; Jin, Yong; Shi, Le; et al. (2018). Solar
Evaporator with Controlled Salt Precipitation
for Zero Liquid Discharge Desalination. ACS Publications. Collection. https://doi.org/10.1021/acs.est.8b03300
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AUTHORS (10)
YS
Yusuf Shi
CZ
Chenlin Zhang
RL
Renyuan Li
SZ
Sifei Zhuo
YJ
Yong Jin
LS
Le Shi
SH
Seunghyun Hong
JC
Jian Chang
CO
Chisiang Ong
PW
Peng Wang