THAI NGUYEN UNIVERSITY UNIVERSITY OF AGRICULTURE AND FORESTRY DOAN THI TUOI TOPIC TITLE: ASSESSING THE ELECTROPLATING WASTEWATER TREATMENT SYSTEM OF HOA PHAT FURNITURE FACTORY - PHO NOI INDUSTRIAL ZONE - HUNG YEN PROVINCE BACHELOR THESIS Study Mode : Full-time Major : Environmental Science and Management Faculty : International Training and Development Center Batch : 2010-2015 Thai Nguyen - 2015 i ACKNOWLEDGEMENT I would like to express my sincere gratitude to my research supervisor, Assoc. Nguyen The Hung, for supporting me all the way through this thesis. His invaluable encouragement interesting viewpoints and constructive comments on this thesis have been highly appreciated. Therefore, I have completed the project on time.
Further, I am very grateful to the general-director, Ms. Dang Xuan Thuong, manager of material department Mrs. Nguyen Thi Bich and all staffs who have supported me through the thesis in Viet Sing environmental joint stock company, giving me many good ideas and helping me in all time of internship, research and writing of this thesis. I am also thankful to staffs working on an operating wastewater system at Hoa Phat Furniture Company, have directly facilitated and helped me during investigation fieldwork in this study area.
Thank you for your time and willingness to share your experience with me. Finally, I would like to thank all my friends, my classmates, especially my family for their great support. Thai Nguyen, September 30, 2015 The implementation Doan Thi Tuoi ii Thai Nguyen University of Agricultural and Forestry Degree program Bachelor of Environmental Science and Management Student name Doan Thi Tuoi Student ID DTN1153110081 Thesis title Assessing the wastewater system of Hoa Phat Furniture Factory - Pho Noi industrial zone - Hung Yen province Supervisors Assoc. Nguyen The Hung General-director: Ms Dang Xuan Thuong Manager of material department Mrs.
Nguyen Thi Bich Abstract: Hoa Phat Furniture Factory is one of the biggest factories in Pho Noi A Industrial Zone-Hung Yen province. The major field production of Hoa Phat Furniture factory is the electroplating industry. Electroplating technology has a very important contribution to the industry. However, waste water from the electroplating process is a very worrying problem by changing the pH from low to high levels, especially containing heavy metal ions (Cr, Ni, Zn, and Cu) causing serious pollution on the ecological environment, seriously affecting human health.
The main goals of the study were: (1) to assess the manufacturing processes and the manufacturing technology related to the wastewater streams of Hoa Phat Furniture Factory;(2) to assess the wastewater quality and characteristics of each wastewater stream before and after treatment by the wastewater treatment system and (3) to assess the treatment efficiency of wastewater treatment system - Hoa Phat Furniture Factory. Wastewater sampling were collected from 04 different sources before treatment and 01 final source after iii treatment with frequency 1 time/month. The indicators in wastewater were analysis: pH, TSS, Cr6+, Cr3+, Ni, COD, NH4+, total mineral oil from the electroplating manufacturing process. There are drastic variations for pH (2.2), hexavalent Chromium (91÷389 mg/l), trivalent Chromium (117÷139 mg/l), COD (35÷750 mg/l), Nickel (1÷46 mg/l), Fe (30÷32 mg/l) level at different sampling time and different sources.
Water parameters were higher than the standard of column A of QCVN 40:2011/BTNMT for industrial wastewater quality many times. Viet Sing Environmental Joint Stock Company has been installing and designing this wastewater treatment system for wastewater from electroplating manufacturing process of Hoa Phat Furniture Factory. After being treated by the wastewater treatment system, all indicators of electroplating wastewater meet the demand of standard of column A of QCVN 40:2011/BTNMT for industrial wastewater quality. Key words: Wastewater treatment system, electroplating wastewater, Hoa Phat Furniture Factory, Viet Sing environmental joint stock Company Number of pages: 64 Date of submission: September 30, 2015 Sign of supervisor iv TABLE OF CONTENTS LIST OF FIGURES.
1 LIST OF TABLES. 2 LIST OF ABBREVIATIONS. Ration ability of the study. Aims of the study.
Research question and hypothesis. Scientific basis and legal topics. Scientific basis of the study. The legal basis.
The status of the environmental pollution caused by industrial electroplating water in Vietnam. Overview about industrial electroplating wastewater treatment method in the world. Ion exchange method. SUBJECTS, CONTENT AND METHODOLOGY.
Subject and scope. Overview about Hoa Phat Furniture factory and potential water pollution sources. Identifying, assessing the quality of wastewater, characteristics of each wastewater stream before and after treatment by the waste water treatment system of Hoa Phat Furniture factory. Assessing the treatment efficiency of the electroplating wastewater treatment system of Hoa Phat Furniture factory.
Gathering materials and documentation. Water sampling and wastewater analysis. Indicators and Methods of wastewater analysis. Data analysis and presentation.
Briefly about Hoa Phat furniture Factory and potential wastewater source. Location of Hoa Phat furniture Factory. Raw materials and products. Potential pollution characteristics of industrial wastewater of Hoa Phat Furniture Factory .1 General wastewater characteristics.
Wastewater quality of each wastewater stream NT1, NT2, NT3, NT4. Identifying, assessing the wastewater quality of each wastewater stream before and after the waste water treatment system of Hoa Phat Furniture factory…. Assessing the current state of wastewater quality before treatment by the wastewater treatment system. Assessing the electroplating wastewater quality after treatment by the waste water treatment system.
Diagram of principle of electroplating wastewater treatment system. Assessing the electroplating wastewater quality after treatment by the wastewater treatment system. Assessing the treatment efficiency of the wastewater system following to the most important individual indicators to be treated. DISCUSSIONS AND CONCLUSIONS.
65 vii LIST OF FIGURES Figure 2.1: Diagram Chromium wastewater treatment by chemical precipitation method.2: Diagram of Ni, acid wastewater treatment system .1: Location of Hoa Phat Furniture Factory in Pho Noi industrial zone 32 Figure 4.2: Block Diagram of Cr-Ni-plated lines with waste water stream .3: Principle diagram of electroplating wastewater treatment system .4: Comparison of pH values before and after treatment of the wastewater treatment system.5: The changes of COD value before and after treatment by waste water treatment system .6: The changes of Chromium (VI) concentration before and after treatment by the waste water treatment system.7: The changes in Nickel concentration before and after treatment in wastewater treatment system .8: The changes of Chromium (III) concentration before and after treatment in wastewater treatment system .9: The changes of Fe concentration before and after treatment by waste water treatment system. 57 1 LIST OF TABLES Table 2.1: Water pollutants by the industrial sector.2: Typical parameters of electroplating industrial wastewater .1: Storage conditions of wastewater samples .1: Chemicals and main raw materials used in 1 day.2: Result from qualitative indicator analysis of electroplating wastewater before treatment of Hoa Phat Furniture Factory .3: Result from qualitative indicator analysis of electroplating wastewater after treatment by wastewater treatment system of Hoa Phat Furniture Factory49 2 LIST OF ABBREVIATIONS BTNMT Ministry of Natural Resources & Environment COD Chemical Oxygen Demand PAC (Aln(OH)mCl3n-m) Poly Alumina Chlorua PAM (Coagulation) Poly Acrylamide QCVN National technical standards SetS Settable Solids TCXD Construction Standard TDS Total Dissoled Solids TSS Total Suspended Solids 3 CHAPTER I INTRODUCTION 1. Ration ability of the study Nowadays, environmental protection has become a very urgent problem of all countries in the world because it relates to the survival issue of humanity. Vietnam is no exception to that trend.
Viet Nam industrialization is growing very fast. Electroplating technology has a very important contribution to the industry. Electroplating applications in the manufacturing industry are very wide, such as in the field of production of consumer goods, mechanical engineering industry, motorcycle parts manufacturing, and automobile. However, waste water from the electroplating process is a very worrying problem by changing the pH from low to high levels, and especially containing heavy metal ions (TSS, TDS, Cr6+, Cr3+, Ni, COD, BOD, NH4+) causing serious pollution to the ecological environment, seriously affecting human health.
Hoa Phat Furniture Factory is one of the biggest factories in Pho Noi A Industrial Zone - Hung Yen province. The major field production of Hoa Phat Furniture Factory is the electroplating industry. Several years ago, the residents in the area suffered from direct factory discharge of wastewater in the locality and that is the reason why soil and water is seriously polluted. Water systems of channels suffered daily yellow wastewater flows while rice and vegetables in the field often lost revenue.
Wastewater treatment systems of this factory was built in 2008, it has a capacity of 10m3/h, whereas 744 by decision of the Ministry of Natural 4 Resources and Environment. However, in the investment plans, at the end 2014, factories will have one more electroplating line and move an electroplating line from Nhu Quynh to the factory. Therefore, Pho Noi factory has: 02 electroplating lines with wastewater rate flow of 720m3/day (equal 30m3/h). The issue of the factory depends on the old wastewater treatment system to improve and complete technology design, enhancing the old system to become the new system with a total capacity of 30m3/h.
To learn about the properties and processing technology, assess the performance and the capacity of wastewater systems in electroplating wastewater, though the most general comments on the system to be able to apply electroplating wastewater treatment systems to Hoa Phat Furniture factory and add personal knowledge, the authors selected topics: “Assessing the electroplating wastewater treatment system of Hoa Phat furniture factory - Pho Noi industrial zone - Hung Yen province” 1. Aims of the study - Investigating and assessing the manufacturing processes and the manufacturing technology related to the wastewater streams of Hoa Phat Furniture Factory. - Identifying and assessing the wastewater quality and characteristics of each wastewater stream from the production process on both before and after treatment by the wastewater treatment system - Hoa Phat Furniture Factory. - Assessing the treatment efficiency of wastewater treatment system - Hoa Phat Furniture Factory.
Research question and hypothesis 5 Research question: - What are the applied manufacturing processes and the manufacturing technology of Hoa Phat Furniture Factory? - What are of wastewater quality and characteristics each wastewater stream before and after treatment by a wastewater treatment system - Hoa Phat Furniture Factory? - What are the fundamental parameters: pH, TSS, TDS, Cr6+, Cr3+, Nickel, COD, BOD, NH4+, total mineral oil from the manufacturing process? - What kinds of methods and technologies to treat the wastewater stream? - What is the treatment efficiency of the wastewater treatment system? 1. Research’s requirements - Investigate and gather information; analyze fundamental parameters: pH, Chromium, Nickel, ammonium, COD, TSS, Zn and total mineral oil in waste water from the manufacturing process. - Gathering information and documents about Hoa Phat Furniture Factory. - Gathering information and data about the waste water flow, such as its composition, concentration, and flows.
Limitations The restrictions during the research process include inadequate support devices, equipment and lack of practical experiences. Definitions The concept of environment According to UNESCO’s declaration (1981), the environment may refer to the entire natural systems and systems due to humans creating its 6 surroundings, in which people survive by their labor, exploit the natural or man- made resources, to meet their needs. Concept of sources of wastewater Source of wastewater is a source resulting from wastewater and it is a source of environmental pollution. Categories: There are many ways classifying sources of wastewater, according to Hoang Van Hung (2009), sources of wastewater discharged is classified as follows (Hung, 2009).
Classification according to sources of water pollution. - Source of industrial wastewater. - Source of agricultural waste water. - Source of natural waste water.
- Source of domestic wastewater. 7 CHAPTER II LITERATURE REVIEW 2. Scientific basis and legal topics 2. Scientific basis of the study Definition of environment According to the first clause of Article 3 of the Law on Environmental Protection Vietnam 2014, environment is defined as follows: “Environment is a system of natural and man-made physical factors that surround human beings and affect life, production, the existence and development of human beings and living organisms.