scholarly journals Physio-Chemical Assessment of Industrial Effluents in Chattogram, Bangladesh

2020 ◽  
Vol 5 (2) ◽  
Keyword(s):  
Public Awareness ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Industrial Effluents ◽  
Effluent Treatment ◽  
Sampling Station ◽  
Zero Tolerance Policy ◽  
Before And After ◽  
The Right ◽  
Almost All

Rapid industrialization is adversely impacting the environment globally. The study was carried out to evaluate the biophysical properties of samples contaminated by unplanned industrialization in terms of Effluent Treatment Plant (ETP) efficiency and availability. So, the study aims to evaluate the present scenario of water and air pollution by industrial discharges in order to create public awareness and its impact on public. The study area is Chittagong, the second largest metropolis of Bangladesh and the economic gateway of the country, is situated on the right bank of the river Karnaphuli. This research study was carried out in five industries as a sampling station before and after treatment of industrial discharges and covered mainly winter and dry seasons from Nov 2016 to July 2019.The obtained range of results of waste water were 151-454 mg L-1 for total suspended solids (TSS), 2129-2,999 mg L-1 for total dissolved solids (TDS), 2284-5710 mg L-1 for Total solids, 107-864mg L-1 for hardness, 2.26-7.02mg L-1 for dissolved oxygen, 61-191 mg L-1 for biochemical oxygen demand (BOD), 196-260 mg L-1 for chemical oxygen demand (COD), 0.009 mg L-1 for Cd, Here almost all the parameters of industrial discharges are out of range prescribed by the Department of Environment (DoE), Bangladesh which is so much frightening. So, the properly untreated industrial discharges mainly heavy metals are deposited in human bodies through food cycle and inhalation particulate matters impacts on human body. It was observed that all of the industries in the selected area did not establish the ETP section. Most of the used experimental industries almost possessed similar types of ETP and their effluent treatment ways were capable to decrease their different parameters but not effective to maintain the standard discharge limit prescribed by the DoE. Finally, it can be said that like terrorism, our government should take zero tolerance policy against industrial pollution for our existence and then we can save our environment.

scholarly journals INVESTIGATION OF ETP FACILITIES AND THE INDUSTRIAL EFFLUENTS QUALITY: A CASE STUDY IN NOAKHALI INDUSTRIAL AREA, BANGLADESH

2020 ◽  
Vol 14 (2) ◽  
pp. 151-162
Author(s):  
Md. Shiblur Rahaman ◽  
Fozia Momotaz ◽  
Afrida Nurain ◽  
Protima Sarker ◽  
Sahoko Ichihara
Keyword(s):  
Treatment Plant ◽  
Chloride Concentration ◽  
Oxygen Demand ◽  
Industrial Effluents ◽  
Industrial Area ◽  
Effluent Treatment ◽  
Wastewater Disposal ◽  
Untreated Wastewater ◽  
Under Construction

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 exit 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 to operate the ETP regularly for improving the quality of effluents to save our native environment from the harmful effects of wastewater.

scholarly journals Suitability of Macrophytes for Wastewater Treatment and Biogas Generation

2019 ◽  
Vol 9 (2S2) ◽  
pp. 16-18
Keyword(s):  
Wastewater Treatment ◽  
Water Hyacinth ◽  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Cow Dung ◽  
Water Lettuce ◽  
Before And After ◽  
Almost All

In this paper three sustainable approaches are made in waste management option. Firstly primary treated domestic sewage is treated by aquatic macrophytes using duckweed, water hyacinth and water lettuce. Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS), Phosphate, Nitrates are tested before and after. Result indicates in terms of water quality, almost all three plants shows same removal efficiencies. BOD and TSS removal efficiency is attained more than 95%. COD and TDS removal is reached upto 50% for almost all plants. Secondly the used aquatic macrophytes for wastewater treatment is again used for generation of biogas (water lettuce unit, duckweed unit, water lettuce unit). In addition to three aquatic macrophytes, sludge is collected from aquatic macrophyte unit for generation of biogas. Comparison is made with conventional cow dung biogas unit. Result indicates water lettuce and duckweed produce biogas at earlier stage itself and water hyacinth takes some time for starting of biogas production. This may be due to the structure and texture causes some time for decomposition. Sludge gives maximum biogas generation among all experimental setup. Also in this study cow dung did not give biogas more may be due to poor blend ratio of cow dung with water is one of the reason.

scholarly journals Performance of sewage treatment plant with septic tank, anaerobic filter and constructed wetland with Typha spp

2019 ◽  
Vol 14 (7) ◽  
pp. 1
Author(s):  
Paulo Fortes Neto ◽  
Nara Lucia Perondi Fortes ◽  
Elizabeth Da Costa Neves Fernandes de Almeida Duarte ◽  
Rita Do Amaral Fragoso ◽  
Ana Catarina Marcos Henriques ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Constructed Wetland ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Climatic Conditions ◽  
Effluent Treatment ◽  
Septic Tank ◽  
Anaerobic Filter ◽  
Before And After

  The study reports the performance of a sanitary effluent treatment constituted by a septic tank, anaerobic filter and constructed wetland. The study monitored nutrient’s, carbonaceous material’s and thermotolerant coliform’s (CT) removal efficiency during 12 months. The treatment system included a septic tank, an anaerobic filter and a horizontal subsurface flow constructed wetland cultivated with Typha spp. Effluent samples were monthly collected before and after the septic tank, anaerobic filter and wetland. The removal efficiency for N-NH+4 was 37.6%, 66.3% for total P, 37% for COD, 54% for BOD and 99.4% for CT. The anaerobic filter and wetland were more efficient than the septic tank. P-total reduction was higher in the constructed wetland than in the anaerobic filter. Climatic conditions influenced the evaluated constituent’s removal being the highest values during hot months.

scholarly journals One-Point Cellulose Adsorbents for Water Purification

2019 ◽  
Vol 6 (4) ◽  
pp. 01-15
Author(s):  
Yakubu AZEH ◽  
Yohanna Bello Paiko ◽  
Gimba Alfred
Keyword(s):  
Treatment Time ◽  
Fixed Bed ◽  
Oxygen Demand ◽  
Industrial Effluents ◽  
Total Hardness ◽  
Fixed Bed Column ◽  
Physico Chemical ◽  
Before And After ◽  
Biological Contaminants ◽  
Wastewater Quality

The protection of our environment from pollution by various industrial wastewater discharges is of great importance that each Industry treats its effluent to meet acceptable limit/design means to reclaim water from industrial effluents for re-use. The study aimed at reclaiming water from wastewater by assessing the performance of two cellulose adsorbents using the fixed-bed column method to treat pharmaceutical/metal wastewater. The study was carried out by determining the physico-chemical and microbiological parameters of wastewater quality before and after treatment using fixed-bed column. Effluent samples were collected and analyzed according to standard methods. The range of percentage reduction in pollution load with respect to treatment time: 30, 120, 360 and 1440 min was 45-52%, 55-64%, 31-43, 25- 45%, 41- 44%, 55-73%, 48- 51%, 48-54%, 56-71% 13-31%, 45-52%, 47-67% from the metal effluent using nanocellulose adsorbent while 14-24%, 18-23%, 4-10%, 28-46%, 16-20%, 24-42%, 14-32%, 42-57%, 32-52%, 36-47%, 37-56%, 8-53% from the pharmaceutical effluent using oxidized cellulose adsorbent for colour, turbidity, conductivity, total hardness, Nitrite, Phosphate, Ammonia, Biochemical Oxygen Demand, Chemical Oxygen Demand, total solids, total suspended solids and total dissolved solids respectively. Up to 99.9 % was achieved by the adsorbents in the removal of biological contaminants. The study concluded that the celluloses adsorbents showed promising potentials as one-point adsorbent that can be used for water reclamation from wastewater by its ability to remediate both physico-chemical and bacteriological contaminants.

Performance of Chitosan and Polyglutamic Acid in Palm Oil Mill Effluent Treatment

2021 ◽  
pp. 147-173
Author(s):  
Man Djun Lee ◽  
Pui San Lee
Keyword(s):  
Environmental Pollution ◽  
Palm Oil ◽  
Public Awareness ◽  
Oxygen Demand ◽  
Pollutant Removal ◽  
Effluent Treatment ◽  
Palm Oil Mill Effluent ◽  
Polyglutamic Acid ◽  
Palm Oil Mill ◽  
Pollutants Removal

This chapter presents the study on pollutant removal efficiency in palm oil mill effluent using chitosan and polyglutamic acid (PGA). Up until today, palm oil mill effluent (POME) has been considered one of the significant sources of environmental pollution. The characteristics of POME include contaminating the source of drinking water, which is also harmful to the aquatic ecosystem by creating a highly acidic environment or causing eutrophication. With increasing public awareness of environmental pollution, it creates the need to address this issue. Both chitosan and PGA are non-polluting food-based anionic and biodegradable biopolymers that are environmentally friendly in wastewater treatment. The critical parameter to determine the effectiveness of pollutants removal is chemical oxygen demand, colour, and total suspended solids. In this aspect, this chapter also discussed some of the significant findings done in previous studies to provide proper understandings and implications on this topic.

Evaluation of the performance of the Tyson Foods wastewater treatment plant for nitrogen removal

2005 ◽  
Vol 51 (11) ◽  
pp. 159-166
Author(s):  
E. Ubay-Cokgor ◽  
C.W. Randall ◽  
D. Orhon
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Wastewater Treatment Plant ◽  
Suspended Solids ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Total Suspended Solids ◽  
Biological Oxygen Demand ◽  
Average Flow Rate ◽  
Before And After

In this paper, the performance of the Tyson Foods wastewater treatment plant with an average flow rate of 6500 m3/d was evaluated before and after upgrading of the treatment system for nitrogen removal. This study was also covered with an additional recommendation of BIOWINTM BNR program simulation after the modification period to achieve an additional nutrient removal. The results clearly show that the upgrading was very successful for improved nitrogen removal, with a 57% decrease on the total nitrogen discharge. There also were slight reductions in the discharged loads of biological oxygen demand, total suspended solids, ammonium and total phosphorus with denitrification, even though the effluent flow was higher during operation of the nitrogen removal configuration.

scholarly journals Dye Removal From Textile Waste Water Through The Adsorption By Pumice Used In Stone Washing

2015 ◽  
Vol 15 (3) ◽  
pp. 158-163 ◽  
Author(s):  
Aysegül Ekmekçi Körlü ◽  
Saadet Yapar ◽  
Seher Perinçek ◽  
Hatice Yılmaz ◽  
Cem Bağıran
Keyword(s):  
Waste Water ◽  
Waste Water Treatment ◽  
Experimental Studies ◽  
Oxygen Demand ◽  
Economic Benefits ◽  
Waste Production ◽  
Organic Impurities ◽  
Washing Process ◽  
Before And After ◽  
Almost All

Abstract Because the waste production is inevitable in almost all industries, the elimination of these wastes is a requirement in terms of environmental regulations and welfare of all the creatures in the future. In this study, the use of the waste pumice stones of a denim washing mill is intended to eliminate the pollutant by a waste material and obtain economic benefits by converting it to the adsorbent. The pollutants in the effluents obtained from three different localisations of waste water treatment system of the same factory were removed through the adsorption. The experimental studies were carried out in three different steps; characterisation of adsorbent before and after adsorption; adsorption isotherm studies and biological oxygen demand (BOD), chemical oxygen demand (COD) measurements. Characterisation studies showed that the waste pumice has almost the same structural properties with unused one except the existence of some organic residues coming from washing process. The results of adsorption studies conducted at the adsorbent concentrations changing from 5 to 35 g/l revealed that the decolourisation was initial dye-concentration dependent. According to the BOD and COD measurements, the supernatants obtained at the end of adsorption could be assumed as somewhat polluted and this result indicates that the organic impurities other than indigo were also removed through the adsorption.

Catalytic thermolysis treatment of petroleum refinery wastewater collected from effluent treatment plant

2020 ◽  
Vol 18 (5-6) ◽  
Author(s):  
Bineeta Singh ◽  
Ashok K. Verma ◽  
Pradeep Kumar
Keyword(s):  
Petroleum Refinery ◽  
Thermo Gravimetric Analysis ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Effluent Treatment ◽  
Gravimetric Analysis ◽  
Refinery Wastewater ◽  
Compact Structure ◽  
Petroleum Refinery Wastewater ◽  
Process Effects

AbstractCatalytic thermolysis of petroleum refinery wastewater was investigated as a pretreatment process. Effects of various parameters like temperature, pH, dose of catalyst and time were investigated for chemical oxygen demand (COD), turbidity, and element reduction. CuSO4, FeSO4, FeCl3, and 1:1 ratio (v:v) mixture of CuSO4 and FeCl3 were used as a catalyst. The maximum reduction of COD and turbidity were 90 and 98% by mixture (1:1) of CuSO4 and FeCl3 at 70 °C, 7 pH, 1.0 kg/m3 dose in 90 min reaction time. The removal of an element like Cr, Mn, Ni, and Pb was analyzed by ICP-OES. The sludge precipitated after catalytic thermolysis was characterized using scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX), Fourier transform infrared (FTIR) and thermo-gravimetric analysis (TGA)/derivative thermal analysis (DTA) analyses. Sludge from CuSO4 and mixture of CuSO4 and FeCl3 treatment has a compact structure with irregular granule which favors adsorption.

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.

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