Phycoremediation of textile wastewater using indigenous microalgae

Abstract

The recognition that environmental pollution is a worldwide threat to public health and environmental degradation has given rise to new initiatives for environmental restoration for both economic and ecological reasons. There are several methods to treat the dye contaminated industrial wastewater; of which biological treatment methods are economical and environmentally friendly. The bacteria and fungi remediation of dye pollutants has been well characterized over a period of more than 30 years. So, finding other biological methods in addition to bacteria and fungi is great important in the world. As a result, investigating and evaluating Phycoremediation techniques of dye wastewater (bioremediation using Microalgae) have gained a great deal of attention because of their versatility and capacity than bacteria and fungi. The aim of the research is to study Phycoremediation of Textile Wastewater Using indigenous Microalgae. Physico-chemical parameters such as color, pH, total dissolved solid (TDS), biochemical oxygen demand (BOD) and chemical oxygen demand of the waste were determined with ASTM standard methods before and after bioremediation. Photo bioreactor systems were used for Phycoremediation treatment techniques. PH, incubation time and temperature effects were determined on a photo bioreactor treatment and optimal experimental condition was ascertained. Instrumental analytical techniques (UV-Vis, FTIR) were used to determine percent decolorizations of dye wastewater before and after bioremediation; and the actual break down of the dye functional groups. The maximum reductions of the basic parameters; COD, BOD and TDS were obtained 91.50%, 91.90% and 89.10% respectively. The optimum operating conditions in the photo bioreactor system were found incubation time 20 days, 30°C; with 10% of inoculums at a pH of 8. Under these conditions, a maximum of 82.6% decolorization was achieved in 20 days. The experimental investigations evidently tell us algae undoubtedly have the potential to rapidly, efficiently and effectively remove dyes wastewater.

The use of banana peel as a low-cost adsorption material for removing hexavalent chromium from tannery wastewater: optimization, kinetic and isotherm study, and regeneration aspects

“…These results are also consistent with the recent studies by T. A. Aragaw and others, who recorded the spectra of raw and activated BP, matching with the spectra in the present study. 48–50…”

Simultaneous bioremediation of Disperse orange-2RL Azo dye and fatty acids production by Scenedesmus obliquus cultured under mixotrophic and heterotrophic conditions

“…The optimum pH level for removal Direct Blue 71 and Disperse Red 1 by Chlorella vulgaris was found to be at 8 1 . Increasing in pH from 6 to 8 caused important proliferation in the rate of removal dye with indigenous microalgae 11 .…”

“…The treatment by microalgae diminishes the color and nutrient load of textile effluent, which diminishes numerous negative environmental influences 10 . Indigenous microalgae have undeniably the potential to rapidly, efficiently, and effectively eliminate dyes in wastewater to acceptable ranges of guide line limits at ambient temperature and neutral pH range 11 . Microalgae, which have been widely cultivated in wastewater treatment, have the ability to remove nutrients from a wide range of wastewater types, including industrial wastewater 12,13 .…”

A Phytochemical Approach to the Removal of Contaminants from Industrial Dyeing Wastewater

“…The advantages of biological processes include environmental compatibility, competitive cost, non-hazardous metabolites, and reduced water consumption [19]. In recent times, microalgae and cyanobacteria have emerged as sustainable remedies for eliminating harmful substances present in various wastewater types, such as agricultural runoff [20], domestic wastewater [21], agroindustrial wastewaters [22][23][24][25], and landfill leachate [26]. It was reported that Cosmarium species could attenuate malachite green dye at temperatures of 5-45 • C and pH 9, demonstrating its ability to treat wastewater containing this pollutant [27].…”