Economic assessment of an integrated memberane system UF/RO for effluent secondary treatment for appropriately selected uses a case study: Hoya Glass Disk Vietnam Co.,ltd :Master's thesis - Major : Sciences and management of the environment

THE JOINT ACADEMIC PROGRAM OF EXECUTIVE MASTER IN

SCIENCES AND MANAGEMENT OF THE ENVIRONMENT BETWEEN

INDUSTRIAL UNIVERSITY OF HOCHIMINH CITY

AND LIÈGE UNIVERSITY

TRAN MANH TIN

Economic Assessment of an Integrated Membrane

System UF/RO for Effluent secondary treatment for

appropriately selected uses

A case study: Hoya Glass Disk Vietnam Co., LTD

Major: EXECUTIVE MASTER IN SCIENCES AND MANAGEMENT OF

THE ENVIRONMENT

MASTER’S THESIS

HOCHIMINH CITY, YEAR 2018

The project was completed at The Industrial University of Hochiminh City

Supervisor’s name:…………………………………………………………………

(Write full name and signature)

The thesis was taken at The Industrial University of Hochiminh City date 23rd April

2018

Committee members (name):

1. ......................................................................... - Committee Chair

2. ......................................................................... - Commissioner

3. ......................................................................... - Secretary

(Write full name and signature)

COMMITTEE CHAIR DEAN OF INSTITUTE OF ENVIRONMENTAL

SCIENCE, ENGINEERING AND MANAGEMENT

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ACKNOWLEDGEMENTS

First of all, I wish to give my special thanks to Prof. Jean-Luc VASEL, my Lecturer of

Water pollution and water treatment module. I wish to give my deep gratitude to

Assoc.Prof. Mai Tuan Anh and Prof. Jean-Luc VASEL, my thesis advisors for their

valuable instruction for written version of this thesis. I am very grateful of my

classmate and my friends for their mental encouragement and practical suggestions

during the draft research process.

Secondly, I would like to express my sincere thanks to The Institute Of Science For

Environmental Management of Industrial University of Ho Chi Minh City who co￾funded my studies at Industrial University of Ho Chi Minh City. I would also like to

thank my dear colleagues for their encouragement and helpful advice.

Thirdly, I give many thanks to the people from Hoya Glass Disk VietNam Co., Ltd.

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ABSTRACT

It is estimated that 22% of worldwide water is used in industry. Major industrial users

include hydroelectric dams, thermoelectric power plants, which use water for cooling,

ore and oil refineries, which use water in chemical processes, and manufacturing

plants, which use water as a solvent. Discharge of untreated water from industrial

uses is pollution. Pollution includes discharged solutes (chemical pollution) and

increased water temperature (thermal pollution). Industry requires pure water for

many applications and utilizes a variety of purification techniques both in water

supply and discharge. Most of this pure water is generated on site, either from natural

freshwater or from municipal city water.

In Viet Nam, spiraling demand for high quality water, for example city water supply

shortage in Thang Long Industrial zones, has stimulated the search for alternative

sources and water treatment methods. The gap between supply and demand can be

bridged primarily by implementing major strategic directions: to further develop non￾conventional water sources—which under specific conditions allow treating the water

to acceptable use levels. Potential extra water treatment methods, including the use of

membrane technology, are primarily for saline and seawater upgrading. At first

glance, membrane treatment of domestic effluent appears attractive, since effluent is a

stable water source.

Extra treatment stages are required to polish the effluent for unrestricted reuse,

primarily for supplying soft water for washing raw material, for boiler and chiller

system. Improved technology for the removal of particles, turbidity, bacteria and

cysts, without the use of disinfectants is based on UltraFiltration (UF) membrane

technology and in series with Reverse Osmosis (RO) for dissolved solids removal.

Field experiments were conducted using a UF and RO membrane unit at a capacity of

around 25.0 m3/hr. Technological constraints refer primarily to the longevity of the

membrane and their performance. Final treatment cost (the objective function)

includes investment, operation and maintenance expenses, UF pretreatment, RO

treatment. The profit includes city water cost and discharge waste water discharge

cost. The project evaluation shows that this case study project is profitable.

In this thesis, we will discuss how to reuse wastewater as a source of water for the

Thang Long I Industrial Zone.

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TABLE OF CONTENTS

LIST OF TABLE..................................................................................................................... 5

LIST OF FIGURES.................................................................................................................... 6

LIST OF ABBREVIATIONS ................................................................................................ 7

INTRODUCTION ................................................................................................................... 8

1.The necessity of the topic ............................................................................................ 8

2.Objective ...................................................................................................................... 9

3. Scope........................................................................................................................... 9

4.Importance ................................................................................................................... 9

CHAPTER 1 OVERVIEW OF THE FIELD OF THE STUDY...................................... 10

1.1 Literature review..................................................................................................... 10

1.1.1 In the Word .......................................................................................................... 10

1.1.2 In Vietnam ........................................................................................................... 14

1.2 Review of Chemical Parameter of water – Major Items ........................................ 15

1.2.2 Conductivity......................................................................................................... 16

1.2.11 Total Iron ........................................................................................................... 20

1.2.12 Sulfate ................................................................................................................ 20

1.3 Review of Physical Parameter of water.................................................................. 20

1.3.1 Turbidity .............................................................................................................. 21

1.3.2 Total Solids Suspended (TSS)............................................................................. 21

1.4 Review of recycle water treatment technologies................................................... 22

1.4.1 Nanofiltration (NF).............................................................................................. 22

1.4.3 Ultrafiltration (UF)............................................................................................... 23

1.4.4 Reverse Osmosis (RO)......................................................................................... 24

CHAPTER 2 METHODS OF THE STUDY ..................................................................... 26

2.1 Basic design ............................................................................................................ 26

2.2 Technology used ..................................................................................................... 27

2.2.1 Ultrafiltration ....................................................................................................... 27

2.2.1.1 Applications...................................................................................................... 27

2.2.1.2 Membrane specifications.................................................................................. 28

2.2.1.3 Process .............................................................................................................. 29

2.2.2 Reverse osmosis (RO) ......................................................................................... 30

2.3 Process description.................................................................................................. 33

2.3.1 Filtered water tank V-126B ................................................................................. 34

2.3.2 UF Unit ................................................................................................................ 34

2.3.3 Buffer tank for UF filtered water......................................................................... 35

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2.3.4 Purification in RO equipment.............................................................................. 35

2.3.5 Buffer tank RO water........................................................................................... 35

CHAPTER 3 APPLICATION OF THE STUDY.............................................................. 36

3.1 Existing condition at HOYA.................................................................................. 36

3.1.1 Treatment Outline Low SS W.W......................................................................... 36

3.1.2 Treatment Outline High SS W.W........................................................................ 37

3.2 Start up date of recycle system line 4 ..................................................................... 39

3.3 Project Evaluation................................................................................................... 41

3.3.1 Project Financial Evaluation................................................................................ 41

3.3.1.1 Method of Financial Evaluation ....................................................................... 41

3.3.1.2 Financial Information ....................................................................................... 42

3.3.1.3 Analysis of Financial Feasibility ...................................................................... 46

3.3.2 Project Risk Evaluation...................................................................................... 477

3.3.2.1 Effect of City water and Wastewater Discharge............................................... 47

3.3.2.2 Effect of RO Cleaning Frequency .................................................................... 49

3.3.2.3 Effect of RO & UF Replacement Frequency.................................................... 50

CONCLUSION AND RECOMMENDATION................................................................. 52

REFERENCES....................................................................................................................... 54