Assessing the wastewater system of hoa phat furniture factory pho noi industrial zone hung yen province

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 Prof 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 Prof 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 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÷12.2), 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 LIST OF TABLES LIST OF ABBREVIATIONS CHAPTER I INTRODUCTION 1.1 Ration ability of the study 1.2 Aims of the study 1.3 Research question and hypothesis 1.4 Research’s requirements 1.5 Limitations 1.6 Definitions CHAPTER II LITERATUREREVIEW 2.1 Scientific basis and legal topics 2.1.1 Scientific basis of the study 2.1.2 The legal basis 14 2.2 The status of the environmental pollution caused by industrial electroplating water in Vietnam 16 2.3 Overview about industrial electroplating wastewater treatment method in the world 17 2.3.1 Chemical method 17 2.3.2 Electrochemical method 21 2.3.3 Ion exchange method 22 2.3.4 Biological method 22 v CHAPTER III SUBJECTS, CONTENT AND METHODOLOGY 24 3.1 Subject and scope 24 3.1.1 Subject 24 3.1.2 Research’s scope 24 3.2 Research contents 25 3.2.1 Overview about Hoa Phat Furniture factory and potential water pollution sources 25 3.2.2 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 25 3.2.3 Assessing the treatment efficiency of the electroplating wastewater treatment system of Hoa Phat Furniture factory 26 3.3 Methods 26 3.3.1 Gathering materials and documentation 26 3.3.2 Water sampling and wastewater analysis 26 3.3.2.1 Water sampling 26 3.3.2.2 Indicators and Methods of wastewater analysis 30 3.3.3 Data analysis and presentation 31 CHAPTER IV RESULTS 32 4.1 Briefly about Hoa Phat furniture Factory and potential wastewater source 32 4.1.1 Location of Hoa Phat furniture Factory 32 4.1.2 Raw materials and products 33 4.1.3 Technological process 34 vi 4.1.4 Potential pollution characteristics of industrial wastewater of Hoa Phat Furniture Factory 38 4.1.4.1 General wastewater characteristics 38 4.1.4.2 Wastewater quality of each wastewater stream NT1, NT2, NT3, NT4 39 4.2 Identifying, assessing the wastewater quality of each wastewater stream before and after the waste water treatment system of Hoa Phat Furniture factory… 40 4.2.1 Assessing the current state of wastewater quality before treatment by the wastewater treatment system 40 4.2.2 Assessing the electroplating wastewater quality after treatment by the waste water treatment system 46 4.2.2.1 Diagram of principle of electroplating wastewater treatment system 46 4.2.2.2 Assessing the electroplating wastewater quality after treatment by the wastewater treatment system 49 4.3 Assessing the treatment efficiency of the wastewater system following to the most important individual indicators to be treated 52 CHAPTER V DISCUSSIONS AND CONCLUSIONS 60 5.1 Discussions 60 5.2 Conclusions 63 5.3 Recommendation 64 REFERENCES 65 vii LIST OF FIGURES Figure 2.1: Diagram Chromium wastewater treatment by chemical precipitation method 19 Figure 2.2: Diagram of Ni, acid wastewater treatment system 20 Figure 4.1: 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 37 Figure4.3: Principle diagram of electroplating wastewater treatment system 46 Figure 4.4: Comparison of pH values before and after treatment of the wastewater treatment system 52 Figure 4.5: The changes of COD value before and after treatment by waste water treatment system 53 Figure 4.6: The changes of Chromium (VI) concentration before and after treatment by the waste water treatment system 54 Figure 4.7: The changes in Nickel concentration before and after treatment in wastewater treatment system 55 Figure 4.8: The changes of Chromium (III) concentration before and after treatment in wastewater treatment system 56 Figure 4.9: The changes of Fe concentration before and after treatment by waste water treatment system 57 LIST OF TABLES Table 2.1: Water pollutants by the industrial sector 11 Table 2.2: Typical parameters of electroplating industrial wastewater 11 Table 3.1: Storage conditions of wastewater samples 29 Table 3.2: Testing method 30 Table 4.1: Chemicals and main raw materials used in day 33 Table 4.2: Result from qualitative indicator analysis of electroplating wastewater before treatment of Hoa Phat Furniture Factory 41 Table 4.3: Result from qualitative indicator analysis of electroplating wastewater after treatment by wastewater treatment system of Hoa Phat Furniture Factory49 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 treatment efficiency, save labor and money More importantly, the phy – chemical method is the most suitable method for the condition of electroplating wastewater source and characteristics of Hoa Phat Factory 5.3 Recommendation The first: With each electroplating line, the waste water quality is different, some output lines is with low concentrations of heavy metals, but some old line output is with high concentrations of heavy metals, water characteristics This leads to wastewater treatment system is very difficult to meet the requirement and high cost The second: some electroplating lines operate intermittently The electroplating wastewater treatment workers is very difficult in the preparation and operation of chemical compound The electroplating wastewater treatment system of Hoa Phat furniture factory is the advanced system using to treat electroplating wastewater with high concentration, high wastewater flow of metals and chemical toxics Therefore, the electroplating wastewater system should be widely replicated for other factories having the same manufacturing process 64 REFERENCES A National Assembly (2014), “environmental 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