Investigation of Effluent Quality from an Effluent Treatment Plant of a Textile Industry, Fakir Knitwear Ltd. Narayangonj, Bangladesh (original) (raw)
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http://www.ijsred.com/volume2/issue5/IJSRED-V2I5P88.pdf, 2019
Industrial wastewater treatment describes the processes used for treating wastewater that is produced by industries as an undesirable by-product. After treatment, the treated industrial wastewater may be reused or released to a sanitary sewer or to surface water in the environment. The textile dyeing and washing industry plays an important role in the economic growth as well as the environmental sectors of Bangladesh. Effluent Treatment Plants or (ETPs) are used by leading companies in the pharmaceutical and chemical industry to purify water and remove any toxic and non-toxic materials or chemicals from it. These plants are used by all companies for environment protection. Effluent Treatment Plant (ETP) is one of the most important & prominent part of Textile dyeing / Wet process industry. In Bangladesh many industrial units are located near the banks of the rivers and they do not use Effluent Treatment Plant (ETP) for wastewater treatment. As a consequence, industrial units dump effluent directly into the river water without consideration of the environment. To combat ecological degradation it is mandatory for textile dyeing / wet process industry to install an effective effluent treatment plant (ETP). This study, focused on investigating the best possible solution to install the most economic and effective effluent treatment plantof textile dyeing / wet process industries in Bangladesh. None of the methods except biological method can satisfy discharge standard. Combined physico-chemical and biological method is considered as the most efficient method. The discharged water is properly treated in the ETP plant to ensure that the discharged waste water is not harmful for environment.Important water quality parameters like pH, TSS, BOD, COD and presence of metals were measured by testing samples. The samples were collected from effluent water of a renowned and international buyer recognized industry named Wash & Wear Ltd in Ashulia, Savar, Bangladesh. The results show that all the water quality parameters are within the permissible limits. Keywords—Waste water, Effluent treatment plant (ETP), Biological treatment, efficiency, water quality, Lab type ETP, BOD, COD, PH, Environment, etc.
Present Environment and Sustainable Development, 2020
Untreated wastewater disposal from industries has been a crucial environmental issue for developing countries like Bangladesh. The current study aims to investigate the status of Effluent Treatment Plant (ETP) and the quality of effluents in the Noakhali industrial area, Bangladesh. Total 10 industries were surveyed and the ETP status showed that about 30% of industries do not have ETP facilities and only 30% of industries use their ETP for the treatment of the effluents where the rest of the industry's ETPs were under construction or exist but not used. Effluent samples were collected from seven locations near the discharge points of various industries. All the physicochemical parameters were determined using standard analytical procedures and analyzed the values comparing with the guideline standard by the Department of Environment (DoE), Bangladesh. The average values of electric conductivity (EC) have exceeded the tolerable limit in maximum effluent samples. On the contrary, the temperature, pH, and total dissolved solids (TDS) values were within the standard limit for all of the collected effluent samples. The chloride concentration of the three effluent samples surpassed the limit. The biological oxygen demand (BOD) and chemical oxygen demand (COD) limit were exceeded for the effluent sampling sites S-6 and S-7 collected near the food and beverage industry. Besides, the maximum dissolved oxygen (DO) values of the effluents were below the standard which indicates poor water quality. Environmental nuisance is producing in Noakhali industrial area as maximum industries have not enough wastewater treatment facilities. Present study demonstrated that it is obvious Md. Shiblur Rahaman, Fozia Momotaz, Afrida Nurain, Protima Sarker, Sahoko Ichihara 152 to operate the ETP regularly for improving the quality of effluents to save our native environment from the harmful effects of wastewater.
The study was conducted to investigate the effluent management techniques and physicochemical properties of effluents in different station of Effluent Treatment Plant (ETP) in Purbani Group during the period from December 2011 to June 2012. Nine water samples were collected from nine different points of the ETP in the Purbani Group. The results of the study revealed that the lowest temperature was found 33.4°c at the outlet. The highest pH was found 9.4 at the inlet and the lowest value was 6.8 at the neutralization tank. The highest DO was found 5.90 ppm at the oxidation tank and sedimentation feeding tank, while 4.1 ppm was found at the outlet. The highest EC was found 4171 µS/cm at the inlet of the ETP, where the lowest was found 1902 µS/cm at the sludge thickener. The study also showed that the lowest TDS (1132 ppm), BOD (23 ppm) and COD (95 ppm) was found at the outlet which was comparatively better than others. Although the effluent from the outlet contained pollutants, these effluent quality was comparatively good than the untreated waste water discharged from the industry.
Implementation of Effluent Treatment Plants for Waste Water Treatment
Journal of Environmental Protection, 2013
This work is aimed at giving emphasis on the present pollution scenario in Bangladesh due to textile effluent and the consequent solution of the problem by installation of effluent treatment plant. Though the medium and small-scale industrial activities have a positive impact on the economy of our country, the increasing industrialization is contributing severe pollution to the environment by the toxic waste discharge. The liquid effluents from industries are causing a major havoc to the environment, ecology, agriculture, aquaculture and public health since the development of textile industries in the country. So, it is time to give a pause to the pollution and phase it out gradually to protect the river system. It had become a prerequisite to set up ETP in each industrial establishment, particularly at dyeing industries that were discharging huge amount of liquid waste to the rivers every day. Since the highest number of factories is of textile category and these types of factories play a major role in polluting the nature, Government's main focus is on the textile mills and industries related to textile. But, for the successful implementation of ETPs, industry owners will have to be socially responsible and at the same time, government should provide the factory owners with logistic supports and relaxed timeframe to set up ETPs.
Evaluation of Textile Wastewater Treatment Via ETP in Bangladesh
INTERNATIONAL JOURNAL OF RESEARCH AND SCIENTIFIC INNOVATION (IJRSI), 2024
Textile liquid waste possesses a substantial biochemical oxygen demand and total suspended solids, hence posing a significant risk of contaminating adjacent water bodies if not appropriately managed. The primary aim of the study is to examine the pH condition of water from the inlet and outlet of the ETP (Effluent Treatment Plant) in two specific regions. Two natural groups in Bangladesh include Tonga Bari, Ashulia, Savar, and Dhaka. Another natural group is "The Emakulet Textile Ltd," located in Purboponchash, Dhamrai, Dhaka. Raw liquid waste was collected from two textile industry and applied some test procedure in the laboratory by varying different design parameters such as pH, DO (Dissolved Oxygen), BOD5 (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), TDS(Total Dissolved Solids), TSS (Total Suspended Solids), Turbidity, Fe2+ , pH was tested by a pH meter at 25℃ temperature. DO also tested by a sensor machine (FLEXA) which shows the values of dissolved oxygen in ETP waste water. To collect BOD5 value needed 5 days minimum also used MnSO4, H2SO4 to get BOD5 value from the incubator. Turbidity was tested by Digital Turbidity meter. The results showeds that the pH condition of water from the inlet is satisfied but others parameter from the inlet sample is not in the range of ECR, 1997. The selected two areas of ETP given the maximum and minimum parameters found, DO in the inlet of two selected areas was (0) from the inlet. The maximum BOD5 value was 126 mg/l from the inlet which crosses the limit of ECR-1997 but after treatment it was 47 mg/l. The detailed experimental results demonstrated that, ETP water is fully treated and all parameter acceptable according to ECR, 1997. In this analysis, it is anticipated that the implementation of a cost-effective treatment approach could serve as an incentive for industrial proprietors to engage in effluent treatment, so contributing to the enhancement of water body quality in Bangladesh.
Performance Evaluation of Textile Effluent Treatment Plant: Bangladesh Perspective
International Journal of Engineering Materials and Manufacture, 2022
The present study was undertaken to evaluate the performance efficiency of an Effluent Treatment Plant (ETP) of a Textile industry located at Tongi, Bangladesh with biological treatment (BT) and Membrane Bio-Reactor (MBR) with an average inflow of 300 m3/hr. The effluent samples were collected from the inlet and outlet of the ETP on a weekly basis for a 4 weeks’ period and were analysed for key parameters such as colour, temperature, total suspended solids (TSS), Total Dissolved Solids (TDS), pH, Dissolved Oxygen (DO), Biological Oxygen Demand (BOD), and Chemical Oxygen Demand (COD). In this study, it was observed that the colour of the effluent in the inlet was dark blue and after multiple unit treatments of the colour’s final outlet the discharge, water colour was very light purple. The temperature was varied from 32.2⁰C to 34.33⁰C. The TDS was varied from 1252.5 mg/l to 1087.5 mg/l and the percentage removal efficiency of TDS was varied from 21.47% to 42.7%. The TSS was varied fr...
Water Practice and Technology
The study was executed at Kalurghat industrial area to determine the efficiency of effluent treatment plants by testing different physicochemical parameters. Results revealed that only 3 out of 9 industries treated their effluents efficiently and discharged following the standards of Department of Environment. The remaining industries viz. Alfa Textile treated their effluent but the values of pH (10.2), dissolve oxygen (DO) (3.6 mg/L), biochemical oxygen demand (BOD) (89 mg/L), chemical oxygen demand (COD) (282 mg/L), total suspended solid (TSS) (221 mg/L), and electric conductivity (EC) (4,003 μS/cm) exceeded the standards, and released untreated effluents directly into the environment. Smart Jeans didn't maintain the standard of EC (1,927 μS/cm), DO (3.2 mg/L), BOD (96 mg/L) and COD (216 mg/L). Asian Apparels EC (1,973 μS/cm), DO (4 mg/L), BOD (79 mg/L), and COD (221 mg/L) weren't up to the standards. Similarly, Mans Fashion EC (1,243 μS/cm), DO (3.7 mg/L), TSS (180 mg/L),...
Effluent Treatment Plant (ETP) is one of the most important & prominent part of Textile dyeing sector. The discharged water is properly treated in the ETP plant to ensure that the discharged waste water is not harmful for nature. If the ETP is performed properly in the industry it ensures the smooth & ethical production operation of the manufacturing units. The ETP unit of some of Bangladeshi dyeing textile unit is taken into consideration for this research. After taking the raw water directly discharged from industry is taken for the parameter checking. Analyzing the acquired result it is clear that if the management of the dyeing unit becomes loyal to the environment with ethics & operate the ETP properly than most of the dyeing industry would perform best with ISO standard. The common measurement & procedures available in the dyeing factory is used to measure the characteristic of discharged waste water.
EFFLUENT TREATMENT AND ANALYSIS
The effluent treatment plant is designed to treat the effluent coming from different areas of the plant. The treatment of different effluents varies with the type of effluent. Water is recycled from effluent coming from textile & chemical industries using series of operations i.e. coagulation, flocculation, aeration, and filtration techniques mainly reverse osmosis. The effluent produce has high BOD, COD, pH, TSS, TDS and Color material. This study includes characterization of effluent and making of process flow sheet of Effluent Treatment Plant after visit to various locations in industrial areas. Points of optimization were identified in various unit operations involved considering the total cost incurred during the whole process. It was identified that automation and use of highly substantive dyes during coloration stages (dyeing & printing) in a textile mill considerably reduces the amount of effluent produced. Effect of different mesh sizes of coagulating agents was (also) studied in conjugation mixing speed. It was noted that use of polyphosphazene membranes instead of polyamides for reverse osmosis plants, as they posses better resistance at high pH and temperature. Nature of Effluent: Waste generated in textile industry is essentially based on water-based effluent generated in the various processes. Textile industry originates a complex huge volume of waste water containing various chemical used in dyeing, printing and finishing processes. Many dyes which causes intensive color in the waste water. The effluent generated in different step or processes is well beyond the standard and thus it is highly polluted and dangerous. Water Consumption in Textile Processing The production of textile goods involves spinning (fiber to yarn), weaving / knitting (yarn to fabric), chemical (wet) processing, and garment manufacturing. The majority of the water
The present study has been undertaken to evaluate performance efficiency of an Effluent Treatment Plant (ETP) of a textile industry located in Narol , Ahmedabad (Gujarat). An effluent treatment plant is operating on Conventional Effluent treatment method with an average wastewater inflow of 630 m3/day. has been considered for case study. The wastewater is analyzed for the major water quality parameters, such as pH, Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD) Total Dissolved Solids (TDS),Total Suspended Solids (TSS)and Ammonical Nitrogen (NH 3 -N) The composite samples were collected on a hourly basis for one day . The raw wastewater pH was highly alkaline it was then bringing down to neutral which was helpful for biological treatment. The BOD, COD, TDS, TSS, NH3-N of the treated effluent reduced significantly, where as very small reduction was observed in dissolved solids (61.25 %). Most of all the parameters were above the permissible limits of Gujarat Pollution Co...