Textile Mill Effluent Research Articles

Phycoremediation of textile and tannery industrial effluents using microalgae and their consortium for biodiesel production

The study reveals the treatment of textile and tannery effluents using freshwater microalgal strains, Chlorella vulgaris (NRMC-F 0128), Scenedesmus dimorphus (NRMC-F 0178), Coelastrella sp., (NRMC-F 0179) and Chlorococcum sp., (NRMC-F 0181) isolated from betel field. The physiochemical parameters of the textile and tannery effluents were analyzed prior to the experimentations. The nutrient removal efficiency of all the cultures was evaluated in both lab and outdoor conditions. Further, a consortium of two efficiently growing and lipid producing strains, Chlorella vulgaris (NRMC-F 0128), Scenedesmus dimorphus (NRMC-F 0178) was tested against effluent degradation under 30 L pond conditions. The levels of pH, TDS (total dissolved solids), EC and nitrite, nitrate, sodium, phosphate, calcium, magnesium, lead, iron, copper and cadmium of both the textile mill and tannery industrial effluents were reduced upon algae mediated remediation. Further, Chlorella vulgaris and Scenedesmus dimorphus consortium produced high amounts of lipid in lab conditions of about 31.20% and 29.50% using textile mill effluent and tannery industrial effluent, respectively; while in outdoor conditions, the lipid was 30.40% and 28.50% respectively. Eventually, the fatty acid analysis showed oleic acid as the major fatty acid in lipids of the consortium, which makes it a plausible candidate for biodiesel production.

Hazardous consequences of textile mill effluents on soil and their remediation approaches

Untreated textile mill effluents are major concern as they associate with various hazardous problems for ecosystems and human health. Complex effluent having a number of dyes, metal contaminations and other organic agents used for softening, printing, heat stabilizing can accumulate in natural sources; soil and water if disposed off without treatment or after in complete treatment. Soil is loose material found on the surface of the earth that importantly offers anchorage for plant, hold water and nutrients. Presence of xenobiotics elements in open and partially covered pits left behind by industrial or domestic activities alter chemical and physical properties of arable soil. This article is mainly focusing the effects of textile mill effluents on soil and their remediation approaches. Bioremediation process is a simple which requires almost negligible energy and very less amount of chemical. This process can be efficiently used in rural areas. This paper gives a review of several researches conducted in the past.

Removal of Organic Pollutants from Textile Mill Effluent using Azadirachta Indica Powder

Due to stringent environmental regulations and increased awareness about the environment, effluent treatment has always been a key aspect of research. Textile industry is one of the oldest and technologically advanced complex industrial sectors employing variety of chemicals and large amount of fresh water consumption. These effluents contain substantial amount of organic pollutants and suspended impurities in varying compositions and hence cannot be discharged directly into the environment. The current research work focused on the utilization of Azadirachta Indica powder as a natural adsorbent for the effective removal of organic and suspended pollutants from textile mill effluent. A series of batch experimental studies were performed by varying the pH of textile mill effluent, stirring time, stirring speed and dosage of Azadirachta Indica powder. Chemical Oxygen Demand (COD), Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Dissolved Oxygen (DO), conductivity, and turbidity were estimated to study the performance of Azadirachta Indica powder in the removal of pollutants. The characterizations of Azadirachta Indica powder before and after treatment are performed using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). The best processing conditions for the effective removal of pollutants from textile mill effluent was obtained at an effluent solution pH 4.0, stirring time 90 min, stirring speed 150 rpm with 1.0 g of Azadirachta Indica powder. The surface morphological structure of Azadirachta Indica powder after batch treatment using scanning electron microscopy indicated that the pollutants are accumulated in the form of clusters on the adsorbent surface. The FTIR spectral analysis indicates the chemical interaction between adsorbent powder and organic pollutants illustrate the characteristic peaks. The study demonstrates that the Azadirachta indica is a promising type of biomass for the effective removal of pollutants from textile mill effluent.
 HIGHLIGHTS
 
 In this research, Azadirachta Indica powder was employed as a natural adsorbent for the effective removal of pollutants from textile mill effluent
 Batch experimental studies were performed by varying the pH of textile mill effluent, stirring time, stirring speed and dosage of Azadirachta Indica powder and the optimum processing conditions were established
 The study demonstrates that the Azadirachta indica is a promising type of biomass for the effective removal of pollutants from textile mill effluent
 
 GRAPHICAL ABSTRACT

Removal of Disperse Orange and Disperse Blue dyes present in textile mill effluent using zeolite synthesized from cenospheres.

In this research, an efficient, ecofriendly method of using coal fly ash in the form of zeolite to treat wastewater containing dyes was studied. Response surface methodology involving Box-Behnken design was applied to a batch process to evaluate the effect of process parameters such as contact time, dye concentration, agitation speed, pH, and adsorbent dosage onto zeolite. Disperse Orange 25 (DO) dye showed a maximum of 96% removal under optimal conditions of contact time of 119 min, dye concentration of 38.00 mg/L, agitation speed of 158 rpm, pH of 6.10, and adsorbent dosage of 0.67 g/L, whereas 95.23% of Disperse Blue 79:1 (DB) dye removal was observed at adsorbent dose of 1.05 g/L, dye concentration of 26.72 mg/L, agitation speed of 145 rpm, pH of 5.68, and contact time of 122 min. It was concluded that cenosphere-derivatized zeolite adsorbent is efficient, ecofriendly, and economical and has high potential for the removal of DO and DB dyes from aqueous solutions.

Coagulation/flocculation process for textile mill effluent treatment: experimental and numerical perspectives

ABSTRACT This study investigates the feasibility of applying coagulation/flocculation process for real textile wastewater treatment. Batch experiments were performed to detect the optimum performance of four different coagulants; Ferric Sulphate (Fe2(SO4)3), Aluminium Chloride (AlCl3), Aluminium Sulphate (Al2(SO4)3) and Ferric Chloride (FeCl3) at diverse ranges of pH (1–11) on the removal of chemical oxygen demand (COD), total suspended solids (TSS), colour, total nitrogen (TN) and turbidity from real textile wastewater. At pH 9, FeCl3 demonstrated the most effective removal for all studied contaminants. Experiments were conducted to assess the dosage and operating conditions to achieve optimum removal efficiency for all studied contaminants by using FeCl3. The obtained results demonstrated the higher ability of FeCl3 in textile wastewater treatment with optimum conditions; pH 9, 150 rpm in 1 min rapid mixing, 30 rpm in 20 min slow mixing and 30 min settling. Artificial neural network (ANN) model was applied to predict the removal efficiencies of the studied contaminants under different variables using FeCl3 coagulant. ANN model adequately predicted the studied parameters removal efficiencies with a coefficient of determination greater than 90% and has the capability of simulating the coagulation process and predicting removal percentages using the author’s experimental data.

Sustainable Development of Innovative Green Construction Materials: A Study for Economical Eco-Friendly Recycled Aggregate Based Geopolymer Concrete.

Green revolution and high carbon footprint concepts have attracted the development of a green and sustainable environment. This work endeavors to investigate the behavior of recycled aggregate geopolymer concrete (RAGC) developed with four different types of effluents to develop sustainability in the construction industry and to produce an eco-friendly environment. Each of the types of effluents was used by completely replacing the freshwater in RAGC to examine its influence on compressive strength (CS), chloride ion migration (CIM), split tensile strength (STS), and resistance to the sulfuric acid attack of RAGC at various testing ages. The test outputs portray that the effluent obtained from the textile mill performed well for the CS (25% higher than the control mix) and STS (17% higher than the control mix) of RAGC. Similarly, the highest mass loss of RAGC due to the acid attack (41% higher than control mix) and the highest CIM (29% higher than control mix) were represented by the RAGC mix made with effluent obtained from fertilizer mill. The statistical analysis indicated no significant influence of using textile mill effluent (TE), fertilizer mill effluent (FE), and sugar mill effluent (SE) on the STS, CIM, and mass loss due to acid attack while it presented a significant influence on the CS of various mixes. Therefore, this investigation solidly substantiates the acceptability of studied types of effluents for the fabrication of eco-friendly green materials.

Extraction of pectinase from Candida isolated from textile mill effluent and its application in bio-scouring of cotton

Pectinase is an important enzyme in industrial biotechnology and is widely utilized in industries producing food and beverages. In textile chemical processing, pectinase is utilized for a pretreatment of cotton called bio-scouring where it helps to increase the absorbency of cotton fabric and makes it suitable for further coloration. Various products based on pectinase are available in the market; however, the extraction of pectinase from a novel source which can meet the requirements of bio-scouring remains the quest of research. The present work deals with the isolation of fungus (Candida) from textile mill effluent for the extraction of extracellular thermostable pectinase. Optimization of temperature and pH of pectinase activity was studied. The crude enzyme extract showed efficient activity under the broad range of temperature and pH. The bio-scoured cotton showed an acceptable level of absorbency (absorbency < 3 s). The colour values of the dyed fabrics, scoured using conventional and bio-scouring, were comparable. The effluent load was lower for a bio-scouring process as compared to that of traditional scouring.

Assessment of hydrogeochemical processes in the aquifers of Coimbatore city, India with special reference to nickel contamination

Rapid industrialization of the city of Coimbatore in the recent past has imposed stress on groundwater resources, resulting in quantity depletion and quality deterioration. The present study aimed at evaluating the groundwater quality of Coimbatore city, India. Qualitative analysis of 17 groundwater samples were made during the post-monsoon and pre-monsoon in 2015. As groundwater forms a dominant source for irrigation and domestic purposes, an evaluation of its suitability for these purposes were assessed. Classic geochemical methods have been coupled with geospatial approaches to arrive at the geochemical processes controlling the hydrochemistry of groundwater. The study reveals that the high concentration of Nickel and Total Dissolved Solids in the groundwater is caused due to the contamination from textile mill effluent, which is discharged into the Noyyal river and ultimately join the water table. The influence of this contamination is reflected in the geochemical processes, wherein the contaminated area exhibits different water type at different seasons; Ca-type water was converted to Na-type or mixed Na, Ca-type during the transition from post-monsoon to pre-monsoon. Majority of the samples are influenced by rock-water interaction and the dominance of the processes followed the order ion exchange > weathering > reverse ion exchange. The major driving force for ion exchange between Ca2+ in rock and Na+ in water was the abundance of Na+ in the percolating water, which is contributed by textile effluent. Among the weathering process, carbonate weathering dominated silicate weathering due to the presence of limestone deposit and red calcareous soil. The quantification of saturation index suggests that carbonate minerals are super saturated in the groundwater in the following order: dolomite > calcite > aragonite, while other minerals including fluorite, halite and gypsum were unsaturated.

Analysis of remediation potential of whole bacterial cells on wastewater decolourisation and detoxification

Abstract Textile effluent is one of the major sources of land and water pollution due to the presence of dyes in addition to other contaminants. The lands receiving these toxic effluents have become deprived of a number of species of natural flora. Competency of indigenous bacterial strains to degrade the dyestuffs present in textile wastewater was evaluated. Decolourization by the bacterial strains was found to be 36%, 66% and 89% for B. cereus, B. thurningienis and B. licheniformis, respectively. The comparative analysis showed that COD reduced to 80% by B. cereus, 82% by B. thuringiensis and 93% by B. licheniformis whereas BOD reduced to 61% by B. cereus, 65% by B. thuringiensis and 69% by B. licheniformis. TS, TDS, TVS and TSS contents reduced to 34%, 89%, 21%, 9% by B. cereus, 36%, 98%, 30%, 41% by B. thuringiensis and 43%, 99%, 43% and 49% by B. licheniformis. Seed germination and growth of Triticum eastivum was used as an indicator to study the phytotoxic effects of textile mill effluents. Plants grown with treated effluent showed maximum growth of plumule and radical and such properties may be helpful to develop alternatives for the management of dyeing wastewater. Maximum tolerance index and minimum relative toxicity and percentage phytotoxicity was found with bioremidiated textile industrial effluent. This study showed the effectiveness of biological pretreatment involving appropriate microorganisms. Bioremediation, no doubt, is an inexpensive and environment friendly approach for eradication of toxic effects caused by dyes and ultimately the conservation of natural flora.

Extraction of amylase from the microorganism isolated from textile mill effluent vis a vis desizing of cotton

Amylase is one of the most popular enzymes in industrial biotechnology and is used widely in different industries such as food, detergent, textile, biofuel, and alcohol production. In textile wet processing, amylase is utilized for a preparatory process called desizing where it helps in the removal of starch from the grey cotton fabric. Even though a wide variety of products based on amylase are available in the market, the extraction of amylase from the novel source which can meet the requirements of desizing remains the quest of research. In the present work, textile mill effluent was utilized as a novel source for the isolation of fungus (Aspergillus), which can produce extracellular thermostable amylase. Temperature and pH optimization of amylase activity was studied, which reveals the broad range temperature stability of the extracted amylase. Zymogram analysis of this enzyme has shown the one isoform of amylase of approximately 55 kDa. The partially purified enzyme was applied on fabric and the treated fabric was analyzed for the efficiency of desizing. The extracted amylase displayed a good level of activity under the broad range of temperature and pH which can be considered as the ideal case for enzymatic desizing. The grey fabric was efficiently desized using the extracted amylase which was confirmed through TEGEWA ratings and absorbency of the desized fabric.

Bioremediation and Biomass Production with the Green Microalga Chlorococcum humicola and Textile Mill Effluent (TE)

The study aimed at possible bioremediation of textile mill effluent (TE) and simultaneous production of useful biomass. The green, unicellular microalga, Chlorococcum humicola was grown in TE. Even in undiluted effluent, this alga reduced several important effluent parameters from 9 to 94% in 6 days and produced increased biomass with improved cell contents as compared to control. Strikingly, NO3 and NO2–nitrogen went below detectable limits within 3 days. In a comparative growth experiment, the growth rate of the alga was maximum in 10% dilution of effluent with supplementation of 0.15% NaNO3. This alga produced extracellular H2O2, even in dark which was limited by nitrogen. TE-grown cells accumulated 32% more lipids and 25% more starch as compared to control. Further, two allelopathic extracellular free fatty acids, namely palmitic and linoleic acids, were detected.

Performance evaluation of isolated electrogenic microalga coupled with graphene oxide for decolorization of textile dye wastewater and subsequent lipid production

Microalgae are photosynthetically competent organisms that utilize solar energy to perform several metabolic activities. In this study, electrogenic microalga Desmodesmus sp. was isolated from discharge site of textile dyeing mill effluent and was explored for its potential for dye degradation and lipid production. Extracellular electron transfer (EET) by microbes displays their capability to associate with its surrounding environment. To attain an efficient alternative, a nanobiotechnological approach was applied, wherein; extracellular electrons of Desmodesmus sp. was coupled with graphene oxide (GO) nanosheets on its electron-rich draper region to form a GO/algae bionanocomposite. Electrochemical tests of the bionanocomposite revealed that amalgamation of GO sheets with Desmodesmus sp. enhanced its electron availability (redox potential) without affecting its viability, demonstrating a sustainable and efficient reduction of azo dye along with enhanced lipid production to be used for biodiesel generation. The current bionanocomposite, thus, offers an eco-friendly, reusable, economical and sustainable solution towards water remediation and subsequent biofuel production.

ADMI color and toxicity reductions in raw textile mill effluent and dye mixtures by TiO2/UV is limited by presence of vat dyes.

Full-scale application of heterogeneous photocatalysis for industrial wastewater treatment remains a challenge because of the complex nature of these matrices and the potential to form toxic by-products during treatment. A recent unsuccessful attempt to find adequate conditions for TiO2/UV treatment of a cotton dyeing textile mill led to this study on the treatability of mixtures of the dyes used in the greatest amounts at the mill and therefore most likely to be present in mill effluent. Four reactive and three vat dyes were mixed in different combinations and treated (10mg/L of each dye, 0.5mg/L TiO2, pH4) to evaluate the influence of the different dyes on ADMI color, chemical oxygen demand (COD), and acute toxicity. While ADMI color removal was similar in all dye mixtures, COD removal was higher when vat dyes were absent. When treated individually, vat dyes exhibited greater recalcitrance, with no ADMI color removal and COD removals of less than 30%. Toxicity to Daphnia similis was decreased or eliminated from dye mixtures that exhibited the highest COD removals and corresponded to those in which reactive dyes were partially degraded. For raw textile mill effluent, photocatalysis reduced but did not eliminate treated effluent toxicity (EC50 = 26.8%).

Remoção de cor ADMI de efluente têxtil após o tratamento biológico utilizando carvão ativado em pó

Efluentes de fábrica têxtil têm composição complexa e, mesmo após o tratamento biológico, ainda apresentamelevada concentração de corantes e pigmentos. A adsorção em carvão ativado tem sido extensivamenteinvestigada para a remoção de corantes, porém a maioria dos trabalhos utilizam efluentes sintéticos ao invés de efluente têxtil real. O objetivo deste trabalho foi avaliar a eficiência de remoção de cor e DQO de um efluente têxtil real com a adsorção em carvão ativado em pó (PAC). Para a caracterização do PAC, foi medido o número de iodo. A cor do efluente foi medida pelo método de cor ADMI. A máxima eficiência de remoção alcançada foi de 60% para DQO e 93% para cor, com 20 g.L-1 de PAC. Ainda, com uma concentração de adsorvente de 4 g.L-1, pode-se alcançar o limite de cor estabelecido pela legislação de Minas Gerais, Brasil. Os resultados mostraram a viabilidade do uso de PAC para remoção de cor e DQO de efluente têxteis.

Synthesis, characterization and application of nanoparticles in wastewater treatment

ABSTRACTThe present research work focused on the synthesis of silica nanoparticles and their surface modifications using layer-by-layer (L-b-L) coating with low molecular-weight chitosan. The surface-modified nanoparticles were employed in the treatment of textile industry effluent. A series of batch experimental studies were performed in the treatment of textile industry effluent by varying the effluent solution pH, contact time, dosage of nanoparticles and stirring speed. Characterizations of the synthesized nanoparticles before and after surface modification are performed using Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Analysis, Fourier-Transform Infrared Spectroscopy (FTIR) and Dynamic Light Scattering (DLS). The experimental observations showed that the sizes of both silica and surface-modified particles are less than 335 nm. The effectiveness of nanoparticles in the treatment of textile mill effluent was studied by assessing the Chemical Oxygen Demand (COD), Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Dissolved Oxygen (DO), Turbidity and Conductivity before and after treatment. The experimental result demonstrates that the surface-modified particles could effectively reduce the pollutants from textile industry effluent.

Heterogeneous photocatalysis using TiO2 modified with hydrotalcite and iron oxide under UV–visible irradiation for color and toxicity reduction in secondary textile mill effluent

The objective of this study was to evaluate ADMI color removal from a biologically treated textile mill effluent by heterogeneous photocatalysis with UV–visible irradiation (UV–vis) using a novel catalyst composed of TiO2 supported on hydrotalcite and doped with iron oxide (HT/Fe/TiO2). Simulated biological treatment of solutions of the dyes (50 mg/L) used in the greatest amounts at the mill where the textile effluent was collected resulted in no color removal in reactive dye solutions and about 50% color removal in vat dye solutions, after 96 h, indicating that the secondary effluent still contained a large proportion of anionic reactive dyes. Photocatalytic treatments were carried out with TiO2 and HT/Fe/TiO2 of Fe:Ti molar ratios of 0.25, 0.5, 0.75 and 1, with varying catalyst doses (0–3 mg/L), initial pH values (4–10) and UV–vis times (0–6 h). The highest ADMI color removal with unmodified TiO2 was found at a dose of 2 g/L and pH 4, an impractical pH value for industrial application. The most efficient composite was HT/Fe/TiO2 1 at pH 10, also at a dose of 2 g/L, which provided more complete ADMI color removal, from 303 to 9 ADMI color units (96%), than unmodified TiO2, from 303 to 37 ADMI color units (88%), under the same conditions. Hydroxyl radicals were responsible for the color reduction, since when 2-propanol, an OH scavenger, was added color removal was very low. For this reason, the HT/Fe/TiO2 1 composite performed better at pH 10, because the higher concentration of hydroxide ions present at higher pH favored hydroxyl radical formation. COD reductions were relatively low and similar, approximately 20% for both catalysts after 6 h under UV–vis, because of the low initial COD (78 mg/L). Secondary effluent toxicity to Daphnia similis (EC50 = 70.7%) was reduced by photocatalysis with TiO2 (EC50 = 95.0%) and the HT/Fe/TiO2 1 composite (EC50 = 78.6%). HT/Fe/TiO2 1 was reused five times and still lowered secondary effluent ADMI color below local discharge limits. Benefits of the HT/Fe/TiO2 1 catalyst compared to TiO2 include its lower bandgap energy (2.34 eV vs 3.25 eV), higher ADMI color removal and its magnetic nature that facilitated its recovery and would reduce treatment costs.

Polyaluminium chloride and flocculation aids for colour removal from biologically treated textile mill effluent

The objective of this work was to construct the polyaluminium chloride (PACl) diagram of coagulation for secondary effluent from a textile industry in order to determine the best coagulant dose and coagulation pH. PACl doses vary between 200 and 450 mg/L with pH values from 4.5 to 8.0. In addition, it was evaluated the effect of applying a copolymer of acrylamide and sodium-acrylate as a flocculation aid and the addition of a decolourant, composed by dicyandiamide, to increase the colour removal efficiency, at the best coagulant dose and pH obtained. Apparent colour removal of 70% was reached in the pH range and coagulant dose predicted for the enhanced coagulation process: high coagulant doses, between 200 and 450 mg/L; and low coagulation pH, between 4.5 and 5.0. The application of the copolymer and the decolourant resulted in an apparent colour removal between 10 and 30% less than the efficiency obtained with PACl application. These results indicate the need for further studies to optimise the application of these combined products with the PACl and improve the colour removal from textile mill effluent.

Polyaluminium chloride and flocculation aids for colour removal from biologically treated textile mill effluent

The objective of this work was to construct the polyaluminium chloride (PACl) diagram of coagulation for secondary effluent from a textile industry in order to determine the best coagulant dose and coagulation pH. PACl doses vary between 200 and 450 mg/L with pH values from 4.5 to 8.0. In addition, it was evaluated the effect of applying a copolymer of acrylamide and sodium-acrylate as a flocculation aid and the addition of a decolourant, composed by dicyandiamide, to increase the colour removal efficiency, at the best coagulant dose and pH obtained. Apparent colour removal of 70% was reached in the pH range and coagulant dose predicted for the enhanced coagulation process: high coagulant doses, between 200 and 450 mg/L; and low coagulation pH, between 4.5 and 5.0. The application of the copolymer and the decolourant resulted in an apparent colour removal between 10 and 30% less than the efficiency obtained with PACl application. These results indicate the need for further studies to optimise the application of these combined products with the PACl and improve the colour removal from textile mill effluent.

Comparative physicochemical and genotoxicity assessments of textile mill company effluent and local tie-and-dye textile wastewater

The textile industry has become indispensable in view of its basic and social importance to human life, but its environmental impact has continued to be a subject of concern. The objectives of the present study were to assess and compare the physico-chemical and genotoxicity properties of a corporate textile mill effluent and the wastewater generated by a local Tie-and-dye (Adire) business in Western Nigeria. While the Allium cepa assay was used to assess genotoxicity, standard APHA and other procedures were used to analyse the physico-chemicalproperties. Results showed that many physicochemical qualities of the two effluent types were higher than the recommended limits. The root growth and mitotic inhibition potential of the two effluent types increased with rising effluent concentrations and period of exposure. The chromosome aberrations induced by the two effluent types were binucleated, attached, vagrant, sticky, and bridged chromosomes. Independent samples t-test analyses revealed that the differences between the two effluent types were only marginal and not significant (P &gt; 0.05). This implies that the textile mill company whose effluent was used for this study did not subject its effluent to treatment before discharging, and if it did, the treatment was grossly inadequate. Governments at all levels in Nigeria, and other countries in which similar results may be obtained, are called upon to reinvigorate their regulatory agencies to enable them to discharge their oversight functions effectively.Keywords: Chromosome, contaminants, environment, effluents, Nigeria, textile

Biotreatment of effluent from 'Adire' textile factories in Ibadan, Nigeria.

In this present study, bacteria were isolated from wastewater and polluted soil collected from two cottage textile factories in Ibadan. These bacteria isolates were used for the biotreatment of textile mill effluent. The physicochemical parameters of the textile mill effluent before treatment were carried out and percentage decolourisation of the effluent was analysed using ultraviolet-visible spectroscopy (UV-vis technique). The degradation products of the textile mill effluent characterised by Fourier transform infrared spectroscopy (FTIR). The pH values of the effluent were within the permissible limit of Federal Environmental Protection Agency (FEPA) and National Environmental Standards and Regulations Enforcement Agency (NESREA), while temperature and electric conductivity of the effluents were below the permissible limit of FEPA and NESREA. The BOD, COD, TSS, TDS and chloride of the textile mill effluent from the two cottage textile factories were above the permissible limits of FEPA and NESREA. Twelve bacteria isolates were screened, effective in decolourising commercial dyes and used to decolourise the textile mill effluent. The bacteria isolates were characterised and identified as Bacillus sp., Micrococcus sp., Erwinia sp., Acinetobacter sp. and Nocardia sp. The decolourisation of textile effluent was observed through the changes of spectra of UV-visible spectrophotometer. The following bacteria revealed different percentage proportion of decolouration profile:- Bacillus sp., had the highest percentage decolourisation of 57.7%, whereas Micrococcus sp. and Acinetobacter sp. had percentage decolourisation of 32.8 and 26.3%, respectively. The degradation profile of textile effluent was revealed through FTIR spectral analysis. The changes in the position of major peaks revealed from the textile effluent through FTIR spectral analysis, appearances of new peaks and the disappearances of existing peaks signify the degradation of the wastewater. Thus, some native microorganisms from the textile effluent could be enhanced to effectively degrade effluent from such environments.