Treatment of high saline textile wastewater by activated sludge microorganisms (original) (raw)
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Frontiers in Microbiology, 2021
Wastewater discharge is a matter of concern as it is the primary source of water pollution. Consequently, wastewater treatment plays a key role in reducing the negative impact that wastewater discharge produce into the environment. Particularly, the effluents produced by textile industry are composed of high concentration of hazardous compounds such as dyes, as well as having high levels of chemical and biological oxygen demand, suspended solids, variable pH, and high concentration of salt. Main efforts have been focused on the development of methods consuming less water or reusing it, and also on the development of dyes with a better fixation capacity. However, the problem of how to treat these harmful effluents is still pending. Different treatment technologies have been developed, such as coagulation-flocculation, adsorption, membrane filtration, reverse osmosis, advanced oxidation, and biological processes (activated sludge, anaerobic-aerobic treatment, and membrane bioreactor)....
Improving biological treatment of textile wastewater
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Textile industries are among the primary contributors of water pollution. Treatment of textile wastewater is very important before discharging it to the environment. In the present study, laboratory-scale anaerobic batch reactors were used for co-treatment of a mixture of textile and domestic wastewater at 37 °C. The objective of this work was to investigate optimum conditions for the anaerobic co-digestion of textile wastewater and domestic wastewater. Domestic wastewater as a carbon source to enhance treatment of textile wastewater in color and other pollutants removal was examined. Textile and domestic wastewater were mixed at different proportions to make a total volume of 500 mL. Proportions of domestic wastewater and retention time were two main factors studied in influencing pollutant removal efficiency. Optimum conditions for removal of pollutants were 18 days' residence time at 60 and 40% textile and domestic wastewater respectively. The removal efficiencies were 52.8, ...
Decolourisation of dye and removal of COD from textile wastewater using biodegradation method
2020
Department of Chemical Engineering, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata-700 009, India E-mail: bmandal20@yahoo.co.in Manuscript received online 05 January 2020, accepted 21 June 2020 A study has been conducted on the biodegradation of dye and removal of chemical oxygen demand (COD) from textile waste water using mixed microbial culture in batch mode process. The microbial consortium was isolated from textile dye wastewater. The effect of process parameters namely, pH, temperature and initial dye concentration on decolourisation and COD reduction of textile waste effluent were studied. The process parameters were optimised using response surface methodology (RSM) based on central composite design (CCD). The experimental results were analysed statistically to evaluate analysis of variance (ANOVA). The optimum values of pH, temperature and initial dye concentration were 7, 30ºC and 327 mg/L, respectively. Under optimum process condition, the percent remov...