scholarly journals Selection of Treatment Process for Textile Dye Wastewater Based on Their Bio-chemical Characteristics

2015 ◽  
Vol 6 (1) ◽  
pp. 163-166 ◽  
Author(s):  
S Tagar ◽  
U Zakira ◽  
F Ahmed
Keyword(s):  
Treatment Process ◽  
Settling Tank ◽  
Industrial Effluent ◽  
Average Concentration ◽  
Laboratory Model ◽  
Chemical Characteristics ◽  
Textile Dye ◽  
Applicability Limit ◽  
Untreated Wastewater ◽  
Volumetric Loading

In Bangladesh most of the industries follow chemical treatment process for wastewater treatment without any effluent quality assessment. The aim of this study was to select an effective treatment process for effluent based on its bio-chemical characteristics. Wastewater samples from Textile Industries were collected in 9 batches over a period of 2 months (from17th November, 2011 to 28th April, 2012). Approximately 40liters composite samples were collected of several dying batches from inlet of the equalization tank. Sludge was collected from outlet point of settling tank. The physical, chemical and bio-chemical quality of untreated wastewater were assessed by analyses of some particular parameters in the laboratory and compared with ECR standard. Average concentration of EC (mS/cm), pH, COD (mg/L), BOD (mg/L) and BOD loading (kg/m3.d) were respectively 3.71, 9.24, 1472, 1024, and 0.205 respectively. For lower BOD loading, the treatment performance was found better..COD decreased rapidly during the first 8 hours of aeration and after 16 hours of aeration it became uniform. During the first 8 hr COD removal was more than 50% of the initial COD loading. The standard value of COD (200mg/l) was obtained within 12 to 16 hours of aeration for the initial BOD loading less than or equal 0.15 kg/m3.day and 24 hours of aeration for initial BOD loading 0.16 to 0.26 kg/m3.day and more than 24 hour for initial BOD loading greater than 0.26 kg/m3.day. The study revealed that volumetric loading is an important parameter for wastewater which to a great extent sets applicability limit of treatment process. From this laboratory model study, treatment process options have been recommended for industrial effluent having different bio-chemical characteristics.DOI: http://dx.doi.org/10.3329/jesnr.v6i1.22060 J. Environ. Sci. & Natural Resources, 6(1): 163-166 2013

scholarly journals Bio Efficacy Assay of Laccase isolated and Characterized from Trichoderma viride in Biodegradation of Low Density Polyethylene (LDPE) and Textile Industrial Effluent Dyes

2021 ◽  
Author(s):  
D. Alwin Johnnie ◽  
Reya Issac ◽  
M. Lakshmi Prabha
Keyword(s):  
Trichoderma Viride ◽  
Industrial Effluent ◽  
Low Density Polyethylene ◽  
Textile Dye ◽  
Low Density ◽  
Health Issues ◽  
Environment And Health ◽  
Textile Manufacture ◽  
Living Organisms ◽  
Laccase Enzyme

This study is based on the biosynthesis of laccase enzyme from fungi Trichoderma viride and its exploitation in biodegradation of polyethylene using Laccase mediator system (LMS -Laccase + 1-HBT) in Low Density Polyethylene (LDPE) and in biodegradation of textile industrial effluent dyes. In different parts of our lifespan we have seen the numerous types of plastics are getting degraded by various methods, still the average time to completely degrade a plastic bottle is at least 450 years.Similarly industry produces over 3.6 thousand individual textile dyes today and utilizes more than 8000 toxic chemicals in numerous methods for textile manufacture comprising dyeing and printing. As polyethylene and textile industrial effluent dyes are causing severe hazardous effect on environment and health issues in all kind of living organisms, it is necessary to degrade plastics and textile industrial effluent dyes in rapid way. Recently researchers have come up with an idea of degrading plastic and textile industrial effluent dyes with the help of microorganisms and enzymes much faster than normal rate. The Laccase enzyme extracted was tested for its optimum temperature and pH. Lowry’s method is used for protein estimation. A control and sample LDPE was subjected to LMS. The tensile strength and elongation of the sample was less than that of the control after 5 days of treatment. This study showed that laccase together with 1-HBT helps to biodegrade polyethylene. The purified laccase enzyme was used for the pretreatment assay and post treatment assay. The Laccase degrades certain reactive dyes like Congo red, Acid Red, Methylene Blue, Brilliant Blue, Metallic Blue and Black. Thus recommends the application of laccase in textile dye colour removal (bioremediation).

scholarly journals Evaluation of the degradation potential of different advanced oxidation processes for a textile dye mixture: a kinetic study with mathematical modeling and toxicological tests

2020 ◽  
Vol 42 ◽  
pp. e7
Author(s):  
Joanna Cysneiros Silva ◽  
Rayany Magali da Rocha Santana ◽  
Graziele Elisandra do Nascimento ◽  
Alex Leandro Andrade de Lucena ◽  
Ana Maria Ribeiro Bastos da Silva ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Treatment Process ◽  
Wastewater Treatment Plants ◽  
Advanced Oxidation ◽  
Textile Dye ◽  
Rapid Decay ◽  
Oxidation Processes ◽  
First Order ◽  
Heterogeneous Processes ◽  
Brazilian Northeast

Studies and research have been developed around the world on environmental pollution. Among the most diverse types of pollutants, textile dyes have attracted attention in the Brazilian Northeast. These compounds, besides being persistent, resist to the conventional treatments applied in the wastewater treatment plants. Thus, the present study evaluated the degradation of the mixture of direct red 23, direct red 227 and direct orange 26 dyes by advanced oxidation processes (AOPs). It was observed that the homogeneous AOPs were more efficient, being able to degrade 100% of the chromophoric groups after the optimization of the variables [H2O2], [Fe] and pH. The reaction kinetics for the photo-Fenton process followed a pseudo-first order non-linear model, with rapid decay of the concentrations in the first 60 min. Aiming to have a methodology capable of predicting the degradation efficiency for the studied processes, it was verified that the artificial neural networks MLP 4-9-3 and MLP 5-6-3 well represent the data from the homogeneous and heterogeneous processes, respectively. A toxicity study was carried out using seeds, bacteria and microcrustaceans and it was found that the intermediate compounds formed during the treatment process act differently for each of them.

scholarly journals Cytotoxicity assays to evaluate tannery effluents treated by photoelectrooxidation

2015 ◽  
Vol 75 (4 suppl 2) ◽  
pp. 53-61 ◽  
Author(s):  
N. Jaeger ◽  
J. P. Moraes ◽  
C. R. Klauck ◽  
G. Gehlen ◽  
M. A. S. Rodrigues ◽  
...  
Keyword(s):  
Treatment Process ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Cultured Cells ◽  
Industrial Effluent ◽  
Neutral Red ◽  
Treatment Efficiency ◽  
Cytotoxic Potential ◽  
Tannery Effluents ◽  
Cytotoxicity Assays

The advanced oxidation process (AOP) is used to increase the treatment efficiency of effluents however, it is necessary to compare the toxicity of treated and untreated effluents to evaluate if the decontamination process does not cause any biological harm. Cultured cells have been previously used to assess the genotoxic and cytotoxic potential of various compounds. Hence, the aim of this work was to assess the applicability of cytotoxicity assays to evaluate the toxicity related to the AOP treatment. Samples of an industrial effluent were collected after their treatment by a conventional method. Cytotoxicity of standard and AOP treated effluents was assessed in CRIB and HEp-2 cell line using the MTT and neutral red assays. We observed decrease at cell viability in the both assays (50% MTT and 13% NRU) when cells were exposed to the AOP treatment in the highest concentration. Thus, cytotoxic assays in cultured cells can be explored as an useful method to evaluate toxicity as well as to optimize effluents treatment process.

Green alga-mediated treatment process for removal of zinc from synthetic solution and industrial effluent

2017 ◽  
Vol 40 (10) ◽  
pp. 1262-1270 ◽  
Author(s):  
R. Senthilkumar ◽  
D. M. Reddy Prasad ◽  
L. Govindarajan ◽  
K. Saravanakumar ◽  
B. S. Naveen Prasad
Keyword(s):  
Green Alga ◽  
Treatment Process ◽  
Industrial Effluent ◽  
Synthetic Solution

Biological wastewater treatment by a bioreactor with repeated coupling of aerobes and anaerobes aiming at on-site reduction of excess sludge

2006 ◽  
Vol 53 (9) ◽  
pp. 71-77 ◽  
Author(s):  
Anfeng Yu ◽  
Quan Feng ◽  
Zehua Liu ◽  
Yunan Zhou ◽  
Xin-Hui Xing
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Removal Rate ◽  
Settling Tank ◽  
Technological Innovations ◽  
Biological Wastewater Treatment ◽  
Excess Sludge ◽  
Wastewater Treatment Process ◽  
Complex Microbial Community ◽  
Continuous Running

Activated sludge has been widely used in wastewater treatment throughout the world. However, the biggest disadvantage of this method is the by-production of excess sludge in a large amount, resulting in difficulties in operation and high costs for wastewater treatment. Technological innovations for wastewater treatment capable of reducing excess sludge have thus become research topics of interest in recent years. In our present research, we developed a new biological wastewater treatment process by repeated coupling of aerobes and anaerobes (rCAA) to reduce the excess sludge during the treatment of wastewater. During 460-day continuous running, COD (300–700 mg/L) and TOC (100–350 mg/L) were effectively removed, of which the removal rate was above 80 and 90%, respectively. SS in the effluent was 13 mg/L on average in the rCAA bioreactor without a settling tank. The on-site reduction of the excess sludge in the rCAA might be contributed by several mechanisms. The degradation of the grown aerobes after moving into the anaerobic regions was considered to be one of the most important factors. Besides, the repeatedly coupling of aerobes and anaerobes could also result in a complex microbial community with more metazoans and decoupling of the microbial anabolism and catabolism.

scholarly journals Evaluation of physicochemical and trace metal qualities of rainwater in the south-eastern region of Bangladesh

2021 ◽  
Author(s):  
Md. Arif Hossen ◽  
Asiful Hoque ◽  
M. Salauddin ◽  
Sudip Kumar Pal ◽  
Mohammad Golam Muktadir ◽  
...  
Keyword(s):  
Trace Metals ◽  
Major Ions ◽  
Principal Component ◽  
Average Concentration ◽  
Anthropogenic Sources ◽  
Chemical Characteristics ◽  
Eastern Region ◽  
The South ◽  
Land Use Patterns ◽  
South Eastern

Abstract The chemical characteristics of rainwater in the south-eastern region of Bangladesh were investigated in this study in addition to identifying the potential sources of different precipitation constituents, which have often been unexplored or not well covered in the literature. Rainwater pH, major ions and trace metals were measured in samples collected from five different locations with different land-use patterns of the Chattogram Metropolitan area (CMA) during two rainy seasons. The results of this study showed variability in rainwater quality across the sites signifying site-specific influences. The mean concentration of all measured physicochemical parameters, ions and trace metals in rainwater samples was also found to be significantly lower compared with the drinking water quality standard of Bangladesh and WHO guidelines. The correlation matrix and principal component analysis (PCA) indicated that and originated from anthropogenic sources, while the average concentration of trace metals found in rainwater was exhibited in the following order: Zn>Cu>Fe>Cr>Mn>Pb>Cd. The findings of this study could be used as a reference to further investigate the influences of industrial, urban and agricultural emissions that regulate the chemical characteristics of the atmosphere in particular areas of study.

PVA-coated activated carbon for aerobic biological treatment of concentrated refractory organic wastewater

2000 ◽  
Vol 42 (3-4) ◽  
pp. 205-210 ◽  
Author(s):  
B.-R. Lim ◽  
H.-Y. Hu ◽  
N. Goto ◽  
K. Fujie
Keyword(s):  
Activated Carbon ◽  
Steady State ◽  
Sulfonic Acid ◽  
Biological Treatment ◽  
Treatment Process ◽  
Solid Phase ◽  
Volumetric Loading ◽  
Ubiquinone 10 ◽  
Polyvinyl Alcohol Particles ◽  
Biological Treatment Process

The treatment characteristics of concentrated p-phenol sulfonic acid (PSA) wastewater in a submerged bioreactor and a solid phase bioreactor packed with ACP particles (polyvinyl alcohol particles coated with powered activated carbon) were compared experimentally. The changes in biomass and microbial community with the degradation of PSA at both bioreactors were also evaluated using microbial quinones as an index. Greater than 95% of influent PSA was mineralized at the solid phase bioreactor under the volumetric loading of PSA ranging from 0.3 to 1.8 kg-C·m-3·d-1 at the steady state, but less than 10% of the influent PSA was mineralized in the submerged bioreactor. The solid phase aerobic biological treatment process was more effective for the treatment of concentrated refractory chemicals such as PSA than the submerged bioreactor. The dominant quinone species in the solid phase bioreactor were ubiquinone-10 and menaquinone-8(H4), while those in the submerged bioreactor were ubiquinone-8 and menaquinone-8. This suggests hat different microbes had contributed to the degradation in the two bioreactors.

Fate of coliphage in waste water treatment process and detection of phages carrying the Shiga toxin type 2 gene

2002 ◽  
Vol 46 (11-12) ◽  
pp. 285-289 ◽  
Author(s):  
Y. Tanji ◽  
K. Mizoguchi ◽  
T. Akitsu ◽  
M. Morita ◽  
K. Hori ◽  
...  
Keyword(s):  
Shiga Toxin ◽  
Treatment Process ◽  
Enrichment Culture ◽  
Waste Water Treatment ◽  
Sewage Treatment ◽  
Settling Tank ◽  
Solid Particles ◽  
Wastewater Treatment Process ◽  
Water Treatment Process ◽  
Shiga Toxin 2

Abundances of phages specific to Escherichia coli in the wastewater treatment process were analyzed. Relatively abundant coliphages were detected in sewage influent. Phages in the influent were found both suspended in liquid phase and attached on the solid particles. Phage concentration was not reduced in the settling tank without chemical agglutination. Anaerobic followed by aerobic treatment of the sewage reduced concentration of suspended phages. Almost no phage was detected as a suspended form in the aerobic tank. Most of the phages were detected as attaching form and were excluded by aggregation with sludge. Using an experimental approach based on the detection of Shiga toxin 2 (Stx 2) gene by a phage enrichment culture followed by nested PCR, bacteriophages carrying Stx 2 gene were detected in the influent, settling tank, and anaerobic tank. It was revealed that the presence of phages carrying Stx 2 gene is common in sewage and these phages are effectively eliminated through sewage treatment process.

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