Assessing Current Situation Of Wastewater From Ha Lam Mine In Ha Long City Quang Ninh Province

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ACKNOWLEDGEMENTS

I would like to express my great appreciation to Msc.Nguyen Thi Bich Hao from

Vietnam Forestry University, my research supervisor, for her enthusiastic encouragement and

useful critiques on this research. Without her thoughtful and patient guidance through every

step of my research and her knowledge on how to correct and analyze the data I collected, this

thesis could not be completed. I also would like to say thanks to lecturers, who have taught us

for more than 4 years, and to the cooperation of Vietnam Forestry University and Colorado

State University, especially, the faculty of Forest Resource and Environmental Management. I

would like to extend my gratefulness to Mr.Le Ngoc Hai, the Vice Director of environmental

company - TKV- Vinacomin for accepting my research in his wastewater treatment station at

Ha Lam mine.

And, I would like to express my gratefulness to Mrs. Tran Thu Ha, the Deputy Head

of Water Resources and Hydrometerology Section, Department of Natural Resources and

Environment, Quang Ninh Province, Vietnam for providing information and documents on

wastewater treatment station at Ha Lam mine.

Xuan Mai, 12th October, 2015

Student

Nguyen Hoa Binh

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CONTENTS

1. INTRODUCTION..............................................................................................................................1

2. GOALS AND OBJECTIVES............................................................................................................3

2.1. Goals.................................................................................................................................................3

2.2. Objectives.........................................................................................................................................3

3. METHODS .........................................................................................................................................4

3.1. Secondary data collections.........................................................................................................4

3.2. Interviewing................................................................................................................................4

3.3. Assessing the wastewater quality ...................................................................................................4

3.3.1. Analyzed indicator selection .........................................................................................................4

3.3.2. Sample locations and sites ............................................................................................................5

3.3.3. Tools and sampling methods.........................................................................................................7

3.3.4. Analysis Methods...........................................................................................................................8

4. RESULTS AND DISCUSSION.................................................................................................. 13

4.1. Assessing the current situation of wastewater in Ha Lam........................................................ 13

4.1.1. Mining activities at Ha Lam mine ........................................................................................... 13

4.1.2. Wastewater treatment systems ................................................................................................ 14

4.1.3. Analyzed results of some indicators for wastewater quality ................................................. 18

Wastewater from mining before treatment at Ha Lam mine .............................................................. 18

Wastewater from mining after treatment at Ha Lam mine................................................................. 20

4.2. Impacts of mining wastewater on surrounding environment at Ha Lam mine ..................... 23

4.2.1. Results of analyzing some water quality indicators at Ha Lam stream.................................... 24

Average values..................................................................................................................................... 24

4.2.2. Impact of wastewater from mining to Ha Lam stream ............................................................. 26

4.3. Solutions to improve effectiveness of the treatment systems.................................................... 27

4.3.1. Reasons of ineffective operation of the wastewater treatment system...................................... 27

4.3.2. Solution to improve effective of treatment system..................................................................... 28

5. CONCLUSION................................................................................................................................ 32

6. REFERENCES................................................................................................................................ 34

7. APENDIXES.................................................................................................................................... 35

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LISTS OF TABLE

Table 3.1. Information on impacts of mining waste water on surrounding environment ..........4

Table 4.1. Quantity of coal exploitation...................................................................................13

Table 4.2. Characteristics of wastewater discharges at Ha Lam mine .....................................16

Table 4.3. Quality of wastewater from mining activities at Ha Lam .......................................19

Table 4.4. The results of analyzed indicators for treated water................................................21

Table 4.5. Analyzed results of surface water............................................................................24

Table 4.6. amount of chemicals used in treatment. ..................................................................27

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LISTS OF FIGURE

Diagram 3.1. Positions of taking water samples..................................................................................6

Diagram 4.1. Coal mining process..................................................................................................... 14

Diagram 4.2. Diagram of wastewater system at Ha Lam mine....................................................... 16

Diagram 4.3. Wastewater treatment system I .................................................................................. 18

Diagram 4.4. Diagram of new system............................................................................................... 30