Assessing current state and proposing solutions to improve waste water treatment effectively in ha bac export garment joint stock company

MINISTRY OF AGRICULTURE AND RURAL DEVELOPMENT VIETNAM FORESTRY UNIVERSITY STUDENT THESIS ASSESSING CURRENT STATE AND PROPOSING SOLUTIONS TO IMPROVE WASTE WATER TREATMENT EFFECTIVELY IN HA BAC EXPORT GARMENT JOINT STOCK COMPANY Major: Natural Resources Management Code: D850101 Faculty: Forest Resources and Environmental Management Student: NGUYEN CONG DAI Class: K59B Natural Resources Management Student ID: 1453091084 Course: 2014 - 2018 Advanced Education Program Developed in collaboration with Colorado State University, USA Supervisor: Assoc Prof Tran Quang Bao, Ph.D Hanoi, 2018 ACKNOWLEDGEMENT During months conducted this study, I received lots of help and encouragement from many people without whom this study would have never happened First and foremost, I would like to express my sincere gratitude to my advisor Dr Tran Quang Bao for the continuous support of my student thesis study and research, for his motivation, enthusiasm, and immense knowledge His guidance helped me in all the time of research and writing of this thesis Beside my advisor, I would like to thank the administration of Vietnam Forestry University, Faculty of Forest Resources and Environmental Management, Center for Environmental Analysis and Application of Geospatial Technology with enthusiasm to impart valuable knowledge for us Next, I also would like to thank Mrs Nguyen Thi Ngoc Bich and teachers who helped me analyze waste water samples to complete student thesis worked at building T7 in Vietnam Forestry University My sincere thanks also goes to many people for their contribution to this research; Mr Dang Van Long- Director of Ha Bac Industrial Washing Joint Stock Company; the Staves in Ha Bac Industrial Washing Joint Stock Company who provided me many useful knowledge about washing process, wastewater treatment process and create some great opportunities for me visit to operation areas of these processes I also would like to thank Ha Bac Export Garment Joint Stock Company Finally, I would further like to thank my family: my parents who always support to me and my friends who helped me in my research Hanoi, 30 September 2018 Nguyen Cong Dai ABSTRACT Topic of student thesis: “Assessing Current State And Proposing Solutions To Improve Waste Water Treatment Effectively In Ha Bac Export Garment Joint Stock Company” Student: Nguyen Cong Dai Student ID: 1453091084 Supervisor: Assoc Prof Tran Quang Bao, Ph.D Objectives:  Evaluating the quality of wastewater in Ha Bac Export Garment Joint Stock Company  Suggesting solutions for improving wastewater quality in the company Research contents: The production process of the plant, the nature of the waste water source (inputs, outputs, production processes, discharge stages ) Evaluate the efficiency of the waste treatment and the environmental management system of the plant Results: Ha bac export garment joint stock company is one of the 50 largest garment enterprises in Vietnam Now, the company includes factories (2 garment factories and industrial washing factory) and manufacture over 13 million products/ year The company also has the necessary investment for environmental protection but the efficiency is not high Identify sources of waste (solid waste, waste gas, waste water) of the company and their impact on the environment Analysis of the sampling results from the site shows that the wastewater of the company is within the permitted level of QCVN 40: 2011 / BTNMT However, there are some indicators that exceed the allowed QCVN are organic substances containing parameters: TSS, turbidity The Environmental Quality Control Department is responsible for planning the environmental protection of the company and for controlling the quality and quantity of the company's wastewater before it is released into the environment The company is interested in waste treatment and has invested in equipment and machinery in the production process, waste water treatment process but compared to the present, the production and processing technology is quite old should not be as high as desired Therefore, the company should upgrade and update the advanced production and processing technology in the world to achieve high economic efficiency while saving energy and protecting the environment LIST OF TABLES Table 2.1: Parameters: pre-treatment wastewater quality…………………………………….17 Table 3.1: Sampling locations……………………………………………………………… 24 Table 5.1: The main waste water source in company……………………………………… 40 Table 5.2: Data form of the results of analyzing necessary indicators in wastewater from Ha Bac Export Garment Joint Stock Company………………………………………………… 50 Table 5.3: Results of waste water analysis from washing process of Ha Bac industrial washing Joint Stock Company…………………………………………………………………………51 LIST OF FIGURES Figure 2.1: The diagram of process technology MBRR wastewater treatment………………12 Figure 2.2: Aerobic tank …………………………………………………………………… 14 Figure 2.3: Anaerobic tank……………………………………………………………………14 Figure 2.4: The diagram of the processing technology for water treatment in textile and garment industry…………………………………………………………………………… 19 Figure 3.1: Wastewater collection tank………………………………………………………24 Figure 3.2: Sediment tank…………………………………………………………………….24 Figure 3.3: Sampling diagram in Ha Bac Industrial Washing Joint Stock Company……… 25 Figure 3.4: Some photos visiting the workspace in the company…………………………….26 Figure 4.1: Geographic location map of Ha Bac export garment joint stock company………31 Figure 4.2: Ha bac export garment joint stock company organization chart…………………34 Figure 4.3: Organization chart of washing factory………………………………………… 35 Figure 4.4: Organization chart of factory 1………………………………………………… 35 Figure 4.5: Organization chart of factory 2………………………………………………… 36 Figure 6: Rate of products in company…………………………………………………….37 Figure 4.7: Kind of products and the markets of company………………………………… 37 Figure 5.1: Diagram of production technology in factory……………………………………39 Figure 5.2: The drainage plan for rainfall chart………………………………………………41 Figure 5.3: The amount of water for daily activities chart……………………………………42 Figure 5.4: The amount of water for production chart……………………………………… 42 Figure 5.5: Diagram of drainage system, canal, ditch after treatment to receiving source… 44 Figure 5.6: Operation diagram of wastewater treatment system…………………………… 45 Figure 5.7: Diagram of areas in sedimentation tank………………………………………….46 Figure 5.8: Diagram of decomposition of surfactant and colorant separated from flotation device…………………………………………………………………………………………48 Figure 5.9: Diagram of floatation tower…………………………………………………… 49 Figure 5.10: Temperature value of wastewater from Ha Bac industrial washing Joint Stock Company………………………………………………………………………………….… 53 Figure 5.11: pH value of wastewater from Ha Bac industrial washing Joint Stock Company…………………………………………………………………………………… 53 Figure 5.12: TSS value of wastewater from Ha Bac industrial washing Joint Stock Company…………………………………………………………………………………… 54 Figure 5.13: COD value of wastewater from Ha Bac industrial washing Joint Stock Company…………………………………………………………………………………… 55 Figure 5.14: N-NH4+ value of wastewater from Ha Bac industrial washing Joint Stock Company…………………………………………………………………………………… 56 Figure 5.15: P-PO43- value of wastewater from Ha Bac industrial washing Joint Stock Company…………………………………………………………………………………… 56 Figure 5.16: Cl- value of wastewater from Ha Bac industrial washing Joint Stock Company…………………………………………………………………………………… 57 Figure 5.17: pH value of treated wastewater from Ha Bac industrial washing Joint Stock Company…………………………………………………………………………….……… 57 Figure 5.18: COD value of treated wastewater from Ha Bac industrial washing Joint Stock Company…………………………………………………………………………….……… 58 Figure 5.19: DO value of treated wastewater from Ha Bac industrial washing Joint Stock Company…………………………………………………………………………………… 59 Figure 5.20: TSS value of treated wastewater from Ha Bac industrial washing Joint Stock Company……………………………………………………………………………….…… 59 Figure 5.21: N-NH4+ value of treated wastewater from Ha Bac industrial washing Joint Stock Company………………………………………….………………………………………… 60 Figure 5.22: P-PO43- value of treated wastewater from Ha Bac industrial washing Joint Stock Company……………………………………….…………………………………………… 61 Figure 5.23: Cl- value of treated wastewater from Ha Bac industrial washing Joint Stock Company…………………………………………………………………………………… 61 ACKNOWLEDGEMENT……………………………………………………………………2 ABSTRACT………………………………………………………………………………… LIST OF TABLES……………………………………………………………………………4 LIST OF FIGURES………………………………………………………………………… TABLE OF CONTENTS…………………………………………………………………….7 CHAPTER I INTRODUCTION……………………………………………………………9 CHAPTER II LITERATURE REVIEW………………………………………………….10 2.1 The generality of garment manufacture in the world……………………………… 10 2.1.1 The history of the formation and development of the textile and garment industry in the world………………………………………………………………………………………….10 2.1.2 The characters of the textile industry in the world…………………………………… 10 2.1.3 The waste water treatment advanced technology in garment manufacture……………12 2.2 The generality of garment manufacture in Vietnam…………………………………14 2.2.1 The history of the formation and development of the textile and garment industry in Vietnam……………………………………………………………………………………….14 2.2.2 The origin and characters of waste water source in garment manufacture factory…….15 2.2.3 The effects of waste water source in garment manufacture factory on environment….18 2.2.4 The generality of waste water treatment technology in garment manufacture……… 18 CHAPTER III OBJECTIVES AND METHODOLOGY:……………………………….24 3.1 Goal & Specific objectives…… ………………………………………………………24 3.2 Sampling area & Time………………………………………………………………….24 3.3 Study methods.………………………………………………………………………….26 3.3.1 Secondary data collection………………………………………………………….26 3.3.2 Method of investigation……………………………………………………………… 26 3.3.3 Analytical method in the laboratory………………………………………………… 27 3.3.4 Data processing method………………………………………………………….…….30 CHAPTER IV INTRODUCTION ABOUT NATURAL – SOCIAL AND ECONOMIC CONDITIONS OF STUDY AREA AND HA BAC EXPORT GARMENT JOINT STOCK COMPANY………………………………………………………………….…… 31 4.1 Natural conditions.…………………………………………………………………… 31 4.1.1 Geographical location and Topography……………………………………………… 31 4.1.2 Climate ……………………………………………………………………………… 31 4.2 Social and economic conditions……………………………………………………… 33 4.3 General introduction about the company…………………………………………….34 4.3.1 The established history……………………………………………………………… 34 4.3.2 The main business activities of the company……… …………………………………36 4.3.3 The oriented development…………………………………………………………… 36 4.3.4 The main product lines of the company……………………………………………… 36 4.3.5 The potential and prospects of the company………………………………………… 38 CHAPTER V RESULTS AND DISSCUSSION………………………………………… 39 5.1 The production situation and discharging source in Ha Bac Export Garment Joint Stock Company………………………………………………………………………….… 39 5.1.1 The production situation and garment manufacturing process……………………… 39 5.1.2 The main waste water source and the characters of waste water source in company….40 5.2 The Current state of the waste water quality in Ha Bac Export Garment Joint Stock Company…………………………………………………………………….……………….41 5.2.1 The waste water collection and waste water treatment technology……………………41 5.2.2 The drainage system into the waste water receiving source………………………… 44 5.3 The results of waste water analysis and the efficiency of wastewater treatment system in Ha Bac Export Garment Joint Stock Company……………………………….49 5.3.1 Study the quality of wastewater through the treatment stages……………………… 49 5.3.2 Results of analyzing waste water samples…………………………………………….50 5.3.3 Current situation in wastewater treatment of Ha Bac industrial washing Joint Stock Company…………………………………………………………………………………… 62 5.4 Suggesting solutions to improve the quality of wastewater for Ha Bac Export Garment Joint Stock Company…………………………………………………………….63 5.4.1 The technological solutions ………………………………………………………… 63 5.4.2 The solutions in management …………………………………………………………64 CHAPTER VI CONCLUSION - LIMITATIONS – RECOMMENDATIONS……… 65 6.1 Conclusion……………………………………………………………………………….65 6.2 Limitations……………………………………………………………………………….65 6.3 Recommendations……………………………………………………………………… 65 REFERENCES ………………………………………………………………………….… 67 APPENDIX………………………………………………………………………………… 68 CHAPTER I INTRODUCTION In recent years, the textile and garment industry has been developing strongly and increasingly serving customers' demand However, the downside is that it generates large amounts of waste, including solid waste, gas and sewage, and these are also major causes of global environmental pollution The textile and garment industry is one of the most important industries and has made a significant contribution to the improvement of people's living and income and employment Ha bac export garment joint stock company is one of the 50 largest garment enterprises in Vietnam The company was established in September 2002, with over 3,000 experienced and skillful staffs, with advanced equipment and advanced equipment The company has a total area of 40,000 square meters The company specializes in manufacturing garment products including make products according to samples available from customer's orders and Launder or dye the products according to samples available from customers' orders The company has played an important role in the development of neighboring areas as well as Bac Giang province The production activities of the plants are constantly developing the product volume, which makes the quality of waste increased constantly In particular, by looking at the sources, I found no one to research to assess the quality of wastewater at the Ha Bac Garment Export Joint Stock Company Therefore, in front of the real situation of the company I have started to implement the topic: “Assessing Current State And Proposing Solutions To Improve Waste Water Treatment Effectively In Ha Bac Export Garment Joint Stock Company” Thereby, I want to know how the company has environmental management policies How effective are these policies applied? What are the existing environmental management issues of the company today? The result of the research is to make objective assessment comments together with solutions to improve the environmental protection for the plant This will contribute to the company's sustainable development and environmental friendliness CHAPTER II LITERATURE REVIEW 2.1 THE GENERALITY OF GARMENT MANUFACTURE IN THE WORLD 2.1.1 The history of the formation and development of the textile and garment industry in the world The history of textile and apparel development is also the history of shifting the textile and apparel industry from the developed to the less developed area by the effects of comparative advantages However, this does not mean that the textile industry no longer exists in developed countries but it has grown higher with high fashion products to cater to a group of people This change began in 1840 from England to other European countries It was followed by Europe from Japan in the 1950s Since 1960, when the cost of manufacturing in Japan increased and the labor force was lacking, the textile industry moved to new industrialized countries (NICs) Hong Kong, Taiwan, Korea Due to the shift of the textile industry, by 1980, the comparative advantage of the textile industry was declining These countries shifted to producing high-tech and technical products such as automobiles and electronics he textile industry continues to shift to South Asian countries, China and then to other countries, including Vietnam 2.1.2.The characters of the textile industry in the world a) On consumption: In the world trade, textile and garment products are one of the first commodities to enter into international trade, and textiles and clothing have particular characteristics that greatly affect production and trade Some of these features are:  Textiles and garments have a rich and varied demand depending on consumers different consumers in terms of culture, geographical area, climate, sex, age, etc different in costumes Market research to understand the demand of each group of people in different markets is especially important in the consumption of products  High-fashion textiles and garments must change their designs, styles, colors and materials in order to meet the needs of new, unique and impressive consumers Therefore, to understand the trends of fashion is very important  Labeling is also one of the prominent features of the world's textile and clothing trade Each manufacturer needs to create its own brand Product branding from a social point of view is often a factor in certifying the quality of goods and the reputation of producers, which is a matter of concern in the product strategy because consumers not only take into account prices but also the quality of the product 10  More in-depth research on wastewater treatment is needed and, if possible, some of the world's modern wastewater treatment methods should be tested in the company's wastewater system  The company needs to build and install several treatment stages so that the quality of waste water discharged into the environment is maximized: - Installing automatic garbage collector instead of using rubbish separator net - Using mud presses to achieve higher efficiency instead of using mud drying yards - Installing observation equipment in the sedimentation tank to monitor the amount of sludge that can be used to increase the quality of wastewater - Using modern machinery to increase the efficiency of wastewater treatment process - Building MBBR tank and biological settling tanks before discharge to sedimentation tanks 69 REFERENCES Ministry of Natural Resources and Environment (2011), "QCVN 40: 2011 / BTNMT National Technical Regulation on Industrial Wastes" Ministry of Natural Resources and Environment (2015), "QCVN 08- MT: 2015 / BTNMT National Technical Regulation on surface water quality" Environmental law 2014 QH13 dated 23/06/2014 http://www.garcohabac.com/about/ January 8th, 2016 Hong Thai commune vietyen.bacgiang.gov.vn Tran Hang December 4th, 2017 Kim ngach xuat khau nganh det may nam 2017 dat 31 ty USD msn.com Le Phuong Anh May 28th, 2014 Cac giai phap phat trien hoat dong xuat khau hang det may 123doc.org Thu Minh 2016 Khai quat ve xuat khau hang det may o Viet Nam va vai tro cua no doi voi nen kinh te voer.edu.vn Van Quy August, 2017 Diem manh diem yeu co hoi thach thuc cua nganh det may viet nam dankinhte.vn 10 Binh Minh environmental company February 26th, 2016 Phuong phap xu ly nuoc thai det nhuom hieu qua nhat bunvisinh.com 11 Ngoc Lan environment company 2015 Xu ly nuoc thai nganh may mac xulymoitruong.com 12 2017 Cong nghe xu ly nuoc thai Ecoclean 13 PGS TS Nguyễn Việt Anh, Viện trưởng, Viện Khoa học Kỹ thuật Môi trường (IESE), Trưởng Ban KHCN – Hội Cấp thoát nước Việt Nam (VWSA) 2017 vietan-enviro.com 14 https://www.iso.org/standard/60857.html 15 Bac Giang Encopl Joint Stock Company, 2016 Báo cáo trạng xả nước thải vào nguồn nước “Công ty cổ phần giặt công nghiệp Hà Bắc” 16 Trần Văn Nhân, Ngô Thị Nga, 2005, Giáo trình cơng nghệ xử lý nước thải, NXB Khoa học kỹ thuật 17 2014 Phuong phap do duc cua nuoc asin.com.vn 70 APPENDIX 71 APPENDIX 01 QCVN 40:2011/BTNMT National Technical Regulation on Indus trial Wastewater GENERAL PROVISIONS 1.1 Scope This standard specifies the maximum permissible values of pollutants in industrial wastewater when discharged into the discharge source 1.2 Applicable subjects 1.2.1 This standard applies to organizations and individuals involved in the discharge of industrial waste water into the waste water-receiving sources 1.2.2 Industrial wastewater of a number of specific industries shall comply with national technical regulations 1.2.3 Industrial wastewater discharged into the collection system of the centralized wastewater treatment plant complies with the regulations of the management and operation unit of the centralized wastewater treatment plant 1.3 Interpretation of terms In this Regulation, the terms below are construed as follows: 1.3.1 Industrial wastewater means wastewater discharged from the technological process of industrial production or service establishments (hereinafter referred collectively to as industrial establishments), from concentrated waste water treatment plants with water connection discharge of industrial establishments 1.3.2 Waste water receiving sources include: urban drainage systems, residential areas; rivers, streams, canals; canals; lakes, ponds, lagoons; Coastal waters have a definite use purpose TECHNICAL REGULATIONS 2.1 Maximum allowable values of pollutants in industrial wastewater when discharged into the receiving water 2.1.1 The maximum permissible values of the pollutants in the industrial effluent discharge when discharged into the WWTP are calculated as follows: Cmax = C x Kq x Kf Inside: - Cmax is the maximum permissible value of the pollutant parameter in the industrial effluent n when discharged into the receiving water - C is the value of the pollution parameters in industrial waste water as prescribed in Table 1; 72 - Kq is the coefficient of receiving water sources defined in Section 2.3, corresponding to the flow of streams, rivers, canals; canals; capacity of lakes, ponds, lagoons; the purpose of use of coastal waters; - Kf is the discharge flow coefficient prescribed in Section 2.4 for total discharge of wastewater discharged by industrial establishments into waste water-receiving sources; 2.1.2 Apply the maximum allowable Cmax = C (no coefficients Kq and Kf) for the parameters: temperature, color, pH, coliform, total radioactivity α, total radioactivity β 2.1.3 Industrial wastewater discharged into urban drainage and sewage systems without residential wastewater treatment plants shall be calculated as Cmax = C prescribed in Column B of Table 2.2 The C value of the pollutant parameters in industrial waste water is given in Table Table 1: C values of pollutants in industrial wastewater No Parameter Unit Value (C) A B 40 40 Temperature Color Pt/Co 50 150 pH - to 5.5 to BOD5 (20oC) mg/l 30 50 COD Mg/l 75 150 TSS Mg/l 50 100 Arsenic Mg/l 0.05 0.1 Mercury Mg/l 0.005 0.01 Lead Mg/l 0.1 0.5 10 Cadmium Mg/l 0.05 0.1 11 Chromium (VI) Mg/l 0.05 0.1 12 Chromium (III) Mg/l 0.2 13 Cropper Mg/l 2 14 Zinc Mg/l 3 15 Nickel Mg/l 0.2 0.5 16 Manganese Mg/l 0.5 17 Iron Mg/l 18 Total cyanide Mg/l 0.07 0.1 19 Total phenol Mg/l 0.1 0.5 C 73 20 Total mineral fats and oils Mg/l 10 21 Sulfide Mg/l 0.2 0.5 22 Fluoride Mg/l 10 23 Ammonium (as N) Mg/l 10 24 Total nitrogen Mg/l 20 40 25 Total phosphorus (as P) Mg/l 26 Chloride ( not applicable Mg/l 500 1000 0.05 0.1 0.3 when discharging into saline water and brackish water) 27 Excess Chloride 28 Total Mg/l Organochloride Mg/l pesticides 29 Total Organophosphorus Mg/l pesticides 30 Total PCB Mg/l 0.003 0.01 31 Coliform Bacteria/100ml 3000 5000 32 Gross α activity Bq/l 0.1 0.1 33 Gross β activity Bq/l 1 Column A of Table defines the C values of pollutants in industrial waste water discharged into water sources used for domestic water supply; Column B of Table defines the C value of pollutants in industrial wastewater when discharged into water sources not used for domestic water supply; The purpose of use of the receiving water is defined in the receiving area 2.3 The coefficient of receiving n sources Kq 2.3.1 The coefficient of Kq corresponds to the flow validity of rivers, streams, streams and canals; canals and ditches are specified in Table below: Table 2: Coefficient Kq corresponds to the flow efficiency of the n receive source Flow rate of receiving water (Q) Kq Unit: m3 /s Q ≤ 50 0.9 50 < Q ≤ 200 200 < Q ≤ 500 1.1 Q > 500 1.2 74 Q is calculated according to the average flow of the wastewater receiving source 03 months dryest for three consecutive years (data of the Hydrometeorological Agency) 2.3.2 The coefficient Kq for the volume of waste water receiving sources is lakes, ponds and lagoons, which are defined in Table below: Table 3: Coefficient Kq for the area of the wastewater receiving source Volume of receiving water ( V) Kq V ≤ 10 x 106 0.6 106 < V ≤ 100 x 106 0.8 V > 100 x 106 V is calculated based on the average volume of the lake, pond, receiving wastewater 03 months dryest in 03 consecutive years (data of Hydrometeorology Agency) 2.3.3 When the sources of wastewater discharge have no data on the flow of rivers, streams, gullies, canals and ditches, Kq = 0.9; lakes, ponds, lagoons without data on capacity, then applied Result = 0.6 2.3.4 The coefficient Kq for receiving wastewater is coastal waters, saltwater and brackish water lagoons Coastal waters used for the protection of aquatic, recreational and recreational water, marine and brackish water lagoons apply Kq = Coastal waters not used for aquatic protection, sports or recreational purposes apply Kq = 1.3 2.4 Coefficient of flow of waste source Kf The coefficient of discharge of Kf source is specified in Table below: Table 4: Waste flow coefficient Kf Discharge rate (F) Kf Unit: m /24h F ≤ 50 1.2 50 < F ≤ 500 1.1 500 < F ≤ 5000 1.0 F > 5000 0.9 75 The discharge volume of F source shall be calculated according to the maximum waste volume stated in the environmental impact assessment report, the environmental protection commitment or the environmental protection scheme METHODS OF DETERMINING 3.1 Sampling for determination of wastewater quality shall comply with the guidance of the following national standards: - Water quality - Part 1: Guidance on programming of sampling and sampling techniques; - Water Quality - Sampling Guidance on preservation and processing of samples; - TCVN 5999: 1995 (ISO 5667 -10: 1992) - Water quality - Sampling Guide to waste water sampling 3.2 The method of determining the value of pollutant control parameters in industrial waste water shall comply with the following national and international standards: - TCVN 4557: 1988 Water quality - method of temperature determination; - Water Quality - Determination of pH; - TCVN 6185: 2008 - Water quality - Checking and identification of color; Water quality - Determination of biochemical oxygen demand after days (BODn) - Part 1: Method of dilution and culture with allylthiourea supplementation; Water Quality - Determination of Biochemical Oxygen Demand (BODn) - Part 2: Nondilution method; - Water quality - Determination of chemical oxygen demand (COD); Water Quality - Determination of Suspended Solids by Filtration through Fiberglass Filtration; - Water quality - Determination of arsenic - Methods of measuring atomic absorption (hydrogen engineering); - TCVN 7877: 2008 (ISO 5666: 1999) Water quality - Determination of mercury; Water quality - Determine cobalt, nickel, copper, zinc, cadmium and lead Flame atomic absorption spectrometric method; - TCVN 6222: 2008 Water quality - Determination of chromium - Method of measuring atomic absorption; Water quality - Determination of hexavalent chromium - Photometry using 1.5 diphenylcacbazide; - TCVN 6002: 1995 Water quality - Determination of manganese - Photometric method using formaldoxim; - Water quality - Determination of iron by spectrometric method using 1.10-phenanthroline reagent; 76 Water Quality - Determination of Selective Elements by Plasma Induced Spectroscopy Spectrometry (ICP-OES) - TCVN 6665: 2011 (ISO 11885: 2007) - TCVN 6181: 1996 (ISO 6703-1: 1984) Water quality - Determination of total cyanide; Water quality - Determination of soluble anions by liquid chromatography - Part 1: Determination of bromide, chloride, fluoride, nitrate, nitrite, phosphate and dissolved sulfates; Water quality - Determination of phenol index - Spectrophotometric method using 4aminoantipyrin after distillation; - Water quality - Determination of single-choice phenols Part 1: Gas chromatography after enrichment by extraction; - TCVN 5070: 1995 Water quality - Methods of determining the volume of oil and petroleum products; - TCVN 7875: 2008 Water - Determination of oil and grease - Infrared projection method; - Water quality - Determination of soluble sulfur - Methylene blue methylene blue; - TCVN 5988: 1995 (ISO 5664: 1984) Water quality - Determination of ammonium - Method of distillation and titration; - Water quality - Determination of ammonium - Voltage method; - Water quality - Nitrogen determination - Catalyzed catalytic reduction after Devarda alloy; Water quality - Determination of phosgates - Methods of measurement of ammonium molybdates; - Water quality - Determination of total coliform - Membrane technique; - Water quality - Detection and counting of escherichia coli and coliform bacteria Part 1: Membrane filtration method; - Water Quality - Detect and count coliform bacteria, heat-resistant coliform bacteria, and escherichia coli Part 2: Multi-tube method (highest probability); Water quality - Determine total chlorine and chlorine Part - Total titration iodine determination method; - TCVN 7876: 2008 Water - Determination of organic chlorine pesticide content - Liquidliquid extraction gas chromatography method; - TCVN 8062: 2009 Determination of organic phosphorus compounds by gas chromatography - Capillary column technique; - Water quality - Measurement of alpha radioactive activity in non-saline water - Method of thickening source; - Water quality - Measurement of total beta activity in non-saline water 77 3.3 Accept the method of analyzing instructions in national and international standards with the accuracy equal to or higher than the criteria referred to in section 3.2 and national and international standards promulgated but not yet invoked in this standard ORGANIZATION OF IMPLEMENTATION 4.1 This standard replaces QCVN 24: 2009 / BTNMT - National technical regulation on industrial waste water, issued together with Circular No 25/2009 / TT-BTNMT dated 16 November 2009 of the Minister of Finance Natural Resources and Environment regulates national technical standards on environment 4.2 The People's Committees of the provinces and centrally-run cities shall publicize the water source use purposes and the coefficient Kq in the water source plannings and the waste water-receiving zones 4.3 State management agencies in charge of environment shall base on the characteristics and characteristics of industrial wastewater and the use purposes of receiving sources to select characteristic and basic values (value C ) specified in Table in the control of environmental pollution 4.4 Where national standards referred to in this Regulation are amended, supplemented or replaced, new standards shall apply 78 APPENDIX 02 NATIONAL QUALITY STANDARDS FOR QUALITY OF WATER National technical regulation on surface water quality GENERAL PROVISIONS 1.1 Scope of application 1.1.1 This standard specifies the limit value of surface water quality parameters 1.1.2 This standard applies: - Assess and manage the quality of surface water, as a basis for proper protection and use of water - To serve as basis for elaboration and approval of water use plannings for definite use purposes - Conformity assessment of surface water quality for approved water use planning - To be the basis for controlling sources of waste into receiving sources, ensuring that surface water sources are always suitable for their use purposes - Be the basis for implementing measures to improve and restore water quality 1.2 Interpretation of words Surface water is water that flows through or lands on land, rivers, streams, canals, ditches, canals, lakes, ponds, lagoons TECHNICAL REGULATIONS Limit values of surface water quality parameters are given in Table Table 1: Limit values of surface water quality parameters Note: The classification of A1, A2, B1, B2 for surface water resources for the assessment and control of water quality, for different water use purposes, sorted by quality level A1 - Used for domestic water supply (after normal treatment), aquatic animal and plant conservation and other purposes such as A2, B1 and B2 A2 - For the purpose of domestic water supply but suitable treatment technology or use purposes such as B1 and B2 B1 - For irrigation, irrigation or other uses with similar water quality requirements or for uses such as B2 B2 - Waterways and other purposes with low quality water requirements Limited value No Parameters A Unit A1 79 B A2 B1 B2 pH 6-8,5 6-8,5 5,5-9 5,5-9 BOD5 (20°C) mg/l 15 25 COD mg/l 10 15 30 50 DO mg/l ≥6 ≥5 ≥4 ≥2 mg/l 20 30 50 100 mg/l 0,3 0,3 0,9 0,9 Chloride (Cl ) mg/l 250 350 350 - Fluoride (F-) mg/l 1,5 1,5 nitrite (NO , calculate N) - mg/l 0,05 0,05 0,05 0,05 - mg/l 10 15 mg/l 0,1 0,2 0,3 0,5 12 Xyanua (CN ) mg/l 0,05 0,05 0,05 0,05 13 Asen (As) mg/l 0,01 0,02 0,05 0,1 14 Cadimi (Cd) mg/l 0,005 0,005 0,01 0,01 mg/l 0,02 0,02 0,05 0,05 16 Chromium VI (Cr ) mg/l 0,01 0,02 0,04 0,05 17 Total Chromium mg/l 0,05 0,1 0,5 18 Cropper (Cu) mg/l 0,1 0,2 0,5 Zinc (Zn) mg/l 0,5 1,0 1,5 20 Nicken (Ni) mg/l 0,1 0,1 0,1 0,1 21 Manganese (Mn) mg/l 0,1 0,2 0,5 22 Mercury (Hg) mg/l 0,001 0,001 0,001 0,002 23 Iron (Fe) mg/l 0,5 1,5 24 surfactant mg/l 0,1 0,2 0,4 0,5 25 Aldrin µg/l 0,1 0,1 0,1 0,1 26 Benzene hexachloride (BHC) µg/l 0,02 0,02 0,02 0,02 27 Dieldrin µg/l 0,1 0,1 0,1 0,1 µg/l 1,0 1,0 1,0 1,0 29 Heptachlor & Heptachlorepoxide µg/l 0,2 0,2 0,2 0,2 30 Total Phenol mg/l 0,005 0,005 0,01 0,02 31 Total oils & grease mg/l 0,3 0,5 1 32 Total Organic Carbon, (TOC) mg/l - - - 33 Gross α activity Bq/I 0,1 0,1 0,1 0,1 34 Gross β activity Bq/I 1,0 1,0 1,0 1,0 35 Coliform MPN CFU /100 ml 2500 5000 7500 10000 36 E.coli MPN CFU /100 ml 20 50 100 200 TSS Amoni + (NH4 ,calculate N) - 10 Nitrite (NO , calculate N) 11 Phosphat 3(PO4 , calculate P) - 15 Lead (Pb) 6+ 19 28 Total Dichloro diphenyl trichloroethane (DDTS) 80 APPENDIX 03 81 82 83 ... the company I have started to implement the topic: ? ?Assessing Current State And Proposing Solutions To Improve Waste Water Treatment Effectively In Ha Bac Export Garment Joint Stock Company? ?? Thereby,... Washing Joint Stock Company - Evaluating the effective treatment of wastewater treatment system in Ha Bac Industrial Washing Joint Stock Company - Suggesting solutions for improving wastewater... Director of Ha Bac Industrial Washing Joint Stock Company; the Staves in Ha Bac Industrial Washing Joint Stock Company who provided me many useful knowledge about washing process, wastewater treatment