scholarly journals Performance Evaluation of Textile Effluent Treatment Plant: Bangladesh Perspective

2022 ◽  
Vol 7 (1) ◽  
pp. 25-34
Author(s):  
Md. Najmul Hasan ◽  
Samsul Islam ◽  
Mohammad Zoynal Abedin
Keyword(s):  
Removal Efficiency ◽  
Textile Industry ◽  
Ph Value ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Effluent Treatment ◽  
Discharge Water ◽  
Effluent Treatment Plant ◽  
Multiple Unit ◽  
Percentage Removal

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 from 4 mg/l to 4.5 mg/l and the percentage removal efficiency of TSS was varied from 98.48% to 98.21%. The pH value was varied from 6.48 to 7.63. The DO value in the inlet was varied from 6.47 mg/l to 6.775 mg/l. The BOD was recorded from 12.75 mg/l to 17.75 mg/l and the percentage removal efficiency of BOD was varied from 89.92% to 87.24%. The COD was varied from 33.75 mg/l to 34.25 mg/l and the percentage removal efficiency of COD was varied from 91.11% to 90.5%. It is conjectured that the values of the measured parameters are seen to be within the permissible limit as per the standard of the Department of Environment (DoE) of Bangladesh.

Treatment of slaughterhouse wastewater

1995 ◽  
Vol 32 (12) ◽  
pp. 99-104 ◽  
Author(s):  
J. Martínez ◽  
L. Borzacconi ◽  
M. Mallo ◽  
M. Galisteo ◽  
M. Viñas
Keyword(s):  
Removal Efficiency ◽  
Treatment Plant ◽  
Effluent Treatment ◽  
Green Water ◽  
Scale Removal ◽  
Effluent Treatment Plant ◽  
In Series ◽  
Fat Removal ◽  
Hydrolysis Of ◽  
Uasb Reactors

In this paper an evaluation of the effluent treatment plant of a slaughterhouse which processes 650 head of cattle a day is presented. Some problems in the operation of the anaerobic reactor and anaerobic lagoons caused by the presence of fats and suspended solids in the effluent were detected. A flotation system by pressurized air injection was tested at the plant. The fat removal efficiency obtained was 63% and 37% for red water and green water, respectively. In order to improve the hydrolysis of particulate matter, a system of two UASB reactors with recirculation, connected in series, was tested at laboratory scale. Removal efficiency was 77% for soluble COD and 82% for insoluble COD, at a volumetric load of 1.8 kgCOD/m3/d. Based on the results of these studies, several modifications in the treatment plant were proposed.

scholarly journals Investigation of Effluent Quality from an Effluent Treatment Plant of a Textile Industry, Fakir Knitwear Ltd. Narayangonj, Bangladesh

2016 ◽  
Vol 8 (2) ◽  
pp. 25-31 ◽  
Author(s):  
MRH Sarker ◽  
A Razzaque ◽  
MM Hoque ◽  
S Roy ◽  
MK Hossain
Keyword(s):  
Textile Industry ◽  
Treatment Plant ◽  
Industrial Effluents ◽  
Quality Parameters ◽  
Effluent Treatment ◽  
Effluent Quality ◽  
Effluent Treatment Plant ◽  
Standard Quality ◽  
Set Up ◽  
Better Than

Textile industries are the major contributor to environmental pollution and health hazards by generating huge amount of effluents that contain several pollutants and coloring agents. The concentration of these pollutants can be reduced to the permissible limit with the help of an Effluent Treatment Plant (ETP). The study was conducted to observe the textile effluent management techniques of an Effluent Treatment Plant (ETP) of Fakir Knitwear Limited (FKL), Narayanganj, Bangladesh. FKL set up a biological treatment plant to treat the effluent generated by the industry. Different effluent quality parameters were investigated at different stages in ETP. The effluent of the outlet was dark colored probably because of soluble coloring materials of the effluent but it is comparatively better than that of raw wastewater. There were found higher EC values than the standards which indicated that the greater amount of salts in the water due to dumping of solid wastes and discharging of industrial effluents. The highest TDS value 2054 ppm was observed at the screening pit unit than the other parts of the ETP. The highest DO was found 4.58 ppm in clarification tank which was within the standard value of aquaculture. The study also showed that the lowest BOD (24 ppm) and COD (145 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. After treatment, the effluent of outlet moderately ensures the standard quality for aquaculture and irrigation. The results suggested that it is obvious to run the ETP regularly to improve the quality of effluents to save our native environment from the harmful effects of wastewater.J. Environ. Sci. & Natural Resources, 8(2): 25-31 2015

scholarly journals Investigation of Waste Water Quality Parameters Discharged from Textile Manufacturing Industries of Bangladesh

2018 ◽  
Vol 13 (2) ◽  
pp. 206-214 ◽  
Author(s):  
M. Ahasanur Rabbi ◽  
Jewel Hossen ◽  
Md. Mirja Sarwar ◽  
Pijush Kanti Roy ◽  
Sharmin Binte Shaheed ◽  
...  
Keyword(s):  
Waste Water ◽  
Textile Industry ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Total Suspended Solid ◽  
Environmental Problems ◽  
Effluent Treatment ◽  
Textile Processing ◽  
Textile Manufacturing ◽  
Ph Values

Textile manufacturing sector is the strongest root of the economy of Bangladesh while pollution by inappropriate management of waste water from textile dyeing industries is one of the major environmental problems. Textile processing employs an assortment of chemicals, contingent upon the idea of the crude materials and items. Environmental problems caused by the the textile industry are mainly the discharges of waste water. The wellspring of waste water contamination are the wet handling steps which incorporate measuring, desizing, scouring, bleaching, mercerizing, coloring, printing etc. The present study was aimed at physico-chemical evaluation of waste water discharged by some garments industries. While in some waste water high pH values have been recorded, the pH values of the waste water before and after treatments were found in between the standard range. The Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Dissolved Solid (TDS) and Total Suspended Solid (TSS) values for waste water before treatment were found to be much higher than the permissible limits. For some industries the BOD, COD, TDS and TSS values of the outlet water from effluent treatment plant (ETP) were also found beyond the standard limits.

scholarly journals Performance of slow sand filters in the after-treatment of effluent from Pernambuco state textile center

2020 ◽  
Vol 15 (6) ◽  
pp. 1
Author(s):  
Alanna Maria do Nascimento Bezerra ◽  
Marcos Henrique Gomes Ribeiro ◽  
Artur Paiva Coutinho ◽  
Ana Emília Carvalho de Gusmão da Cunha Rabelo ◽  
Elizabeth Amaral Pastich Gonçalves
Keyword(s):  
Organic Matter ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Effluent Treatment ◽  
Organic Load ◽  
Sand Filters ◽  
Legal Limits ◽  
Effluent Treatment Plant ◽  
Experimental Apparatus ◽  
State Textile

Jean laundering generates significant effluent flows with a high organic load, color, and other pollutants, making it difficult to adjust effluent releases within legal limits. Slow Sand Filters (SSF) with downflow were tested for seven days (bench scale), to propose an after-treatment of effluents from an Effluent Treatment Plant of a jean laundry. The research evaluated the removal of the following parameters: color, turbidity, chemical and biochemical oxygen demand, conductivity, ammonia, total phosphorus and salinity of the textile effluent. The experimental apparatus had four SSF: the first filter was fed with distilled water, while the other three filters (triplicates) were fed with effluent. The filters had, on average, the following removal efficiencies: 91% for ammonia, 61.24% color, 89.43% turbidity, and 83.54% for phosphorus. Regarding the removal of organic matter, 98.11% for BOD and 81.17% for COD, demonstrating that SSFs were efficient in removing particulate, dissolved materials and organic matter.

scholarly journals Bioassay evaluation of toxicity reduction in common effluent treatment plant

2009 ◽  
Vol 1 (1) ◽  
pp. 8-12
Author(s):  
V. K. Tyagi ◽  
A. K. Chopra ◽  
N. C. Durgapal ◽  
A. A. Kazmi
Keyword(s):  
Settling Tank ◽  
Treatment Plant ◽  
Test Organism ◽  
Oxygen Demand ◽  
Effluent Treatment ◽  
Tertiary Treatment ◽  
Treatment Unit ◽  
Entire Study ◽  
Effluent Treatment Plant ◽  
Domestic Effluent

This paper investigates the utility and validity of bioassay toxicity testing using Daphnia magna straus as test organism for monitoring the common effluent treatment plant (CETP) receiving both industrial as well as domestic effluent. The average daphnia toxicity (Gd) at inlet, after primary settling tank (PST), secondary settling tank (SST) and tertiary treatment unit were reported as Gd-16, Gd-12, Gd-4 and Gd-1 respectively. However, a cumulative percentage removal in toxicity after PST, SST and tertiary treatment units was observed as 25%, 75% and 100%, respectively, during entire study period. It showed that a complete removal in daphnia toxicity (Gd) i.e.100% had been achieved only after tertiary treatment unit involving Dual Media Filters followed by activated carbon filters. Further attempts have been made to establish the relationship between key wastewater constituents i.e. Chemical Oxygen Demand (COD) and Suspended Solids (SS) with respects to daphnia toxicity (Gd). It was observed that COD and SS show a statistically significant correlation (r2) with daphnia toxicity (Gd) i.e. 0.89 and 0.81, respectively. Thus COD and SS can serve as a regulatory tool in lieu of an explicit toxicity standard (to check and improve the operational status of wastewatertreatment plants in time).

scholarly journals Evaluation of the removal of total phosphorus from sanitary effluent by Chlorella vulgaris in a small batch photobioreactor

2018 ◽  
Vol 14 (6) ◽  
Author(s):  
Juliana Cabral Pereira ◽  
Amanda Isabelly Leite Figueiredo Nascimento ◽  
Yasmin Oliveira Carvalho ◽  
Cristina Ferraz Silva
Keyword(s):  
Chlorella Vulgaris ◽  
Environmental Sustainability ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Effluent Treatment ◽  
Promising Alternative ◽  
Effluent Treatment Plant ◽  
The Government

The search of the scientific community for efficient and cheap technologies for the treatment of wastewater in Brazil continues being a challenge, mainly in the effort to encourage the government, responsible for the application and proliferation of these technologies. The release of contaminated effluent without treatment in the aquatic bodies leads to the degradation of these environments, what requires the reuse of these waters, facing environmental sustainability. In this context, microalgae establish a promising alternative, once the main attribute of algae culture in wastewater is its ability to efficiently assimilate organic carbon and inorganic nutrients from wastewater to achieve a clean effluent with efficient nutrient removal, besides a biomass production, accumulation of lipids, which can be converted into biodiesel. Assuming the important role of photosynthetic CO2 fixation, which helps to mitigate the alarming effects of the release of greenhouse gases into the atmosphere. The main objective of this work was to evaluate the capacity of the microalga Chlorela vulgaris in the removal of phosphorus from the sanitary sewage collected at the effluent treatment plant at Federal University of Sergipe using a small batch reactor. The results showed that the species Chlorella vulgaris were able to assimilate phosphorus and to remove organic matter (Chemical Oxygen Demand, COD) from the effluent. The results showed that photobioreactors using microalgae for the treatment of effluents is a promising technique and motivate additional studies, mainly due to their capability of adding value to the biomass generated during the treatment.

scholarly journals Performance Study of CETP (Common Effluent Treatment Plant)-ACase Study of Pandesara, Surat

2018 ◽  
Vol 8 (01) ◽  
Author(s):  
Anjali M. Tandel ◽  
Mitali A. Shah
Keyword(s):  
Coming Out ◽  
Industrial Development ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Total Suspended Solid ◽  
Effluent Treatment ◽  
Performance Study ◽  
Dissolved Solids ◽  
Treated Effluent ◽  
Effluent Treatment Plant

Water is life sustaining element subjected to pollution by human being in the name of industrial development. Global trends such as urbanization and industrialization have increased the demand for fresh water. The developing human societies are heavily dependent upon the availability of water with suitable quality and in adequate quantity for variety of uses. Rapid industrialization is adversely impacting the environment globally. Inappropriate management of industrial wastewater is one of the major environmental problems in India. Many small and medium scale industries cannot afford to have their own effluent treatment facilities which emphasizes on having a common effluent treatment plant to treat the heterogeneous effluent coming out of various sectors. Common Effluent Treatment Plants (CETP) for Textile industry is considered as one of the viable solution for small to medium enterprises for effective wastewater treatment. An effluent treatment plant operating on physical, chemical and biological treatment method with average waste water in flow of 100MLD has been considered for case study. The wastewater was analyzed for the major water quality parameters, such as pH, Chemical Oxygen Demand (COD), Total suspended solid (TSS) and Total Dissolved Solids (TDS). The COD of the treated effluent was reduced significantly, whereas very small reduction was observed in dissolved solids. Most of all the parameters were within the permissible limits of CETP, Pandesara Surat.

scholarly journals Green Insights of Textile Industry in Bangladesh: A Case Study on Mozart Knitting Ltd.

2014 ◽  
Vol 3 (1) ◽  
pp. 93-108 ◽  
Author(s):  
Mst. Afroja Aktar
Keyword(s):  
Commercial Banks ◽  
Textile Industry ◽  
Treatment Plant ◽  
Jel Classification ◽  
Effluent Treatment ◽  
National Standard ◽  
Classification Code ◽  
Textile Dyeing ◽  
Effluent Treatment Plant

The effectiveness of individual units of an Effluent Treatment Plant (ETP) agrees on the entire performance of the plant and the ultimately echoing effluent standard. In this study, an ETP of a composite textile industry in Bangladesh was investigated using this method. After completion of the stipulated study, findings came into force illustrated that water samples had been collected from the dyeing unit and accordingly had been used for the ETP and also been determined for the key parameters. The results were used to identify problems with the treatment units and broadly suggested for modifications. Simple but fully-bodied methodology was developed for assessing the performance of various treatment units and the ETP as a whole that could be implemented by ETP managers on a regular basis for improving the performance so that the effluent meets national standard as well as conforms to the requirements of international standard which is a compliance of the international buyers. To comply with the BB Guidelines commercial banks have taken initiatives on financing to the textile dyeing units in question with the implementation of ETP.  The ETP’s performance on Mozart Knitting Ltd. shown that it has been performing with the underprivileged management, especially chemical dosing were affecting the ETP’s performance and that simple measures could address the problems. A number of equipment i.e middle pathways rolling, water transferring pipes should repair without more ado. JEL Classification Code: L67, K32  

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