Seawater Desaliantion

In: Science

Submitted By Maxlovwxiyang
Words 1578
Pages 7
Seawater desalination for sustainable water supply

Contents I. Introduction 2 II. Seawater desalination and its advantages and disadvantages 2 III. Environmental impacts 3 IV. Policy for desalination plant 3 V. Conclusion 4

Student ID: z5084901
Student name: Boheng Zhu
School of Chemical Engineering
The University of New South Wales
April 2016
Introduction
Australia has uncertain rainfall and most parts of it have droughts, and has increasing population in large cities in recent years (Legislative Council Secretariat 2015). These conditions pose a threat to water supply. In addition, it is more and more limited and improper to build water pipes to draw water from dams and reservoirs. Due to these facts, seawater desalination plants have been constructed to ensure the water supply in Australia’s large population urban centers. Seawater desalination mainly uses membrane process to desalinate seawater rather than thermal process, because reverse-osmosis (RO) in membrane process consumes less energy, and in the RO desalination, seawater is divided into two streams: one with very high dissolved salts and the other one with less salts (Gary Crisp, E.A. (Bob) Swinton and Neil Palmer* 2010).
However, seawater desalination has its drawbacks: energy intensive, generation of greenhouse gases, impacts of desalination discharge on marine environment and its high operating costs. These issues are associated with Australia’s environment and economy (Reza Dashtpour and Sarim N. Al-Zubaidy 2012), therefore it is necessary to cope with these problems with the development and improvement of the membrane process technology.
This essay will introduce RO seawater desalination, discuss both advantages and disadvantages, some environmental issues and give policies about how government should regulate seawater desalination plant in Australia.
Seawater…...

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