Assessment of the efficacy of Aspergillus sp. EL-2 in textile waste water treatment

Abstract

Fungal biomass has the ability to decolorize a wide variety of dyes successfully through a number of mechanisms. A brown rot isolate, previously identified as Aspergillus sp. EL-2, was used in the aerobic treatment of textile waste water efficiently. In the current work, the treated waste water was tested chemically using more than one combined treatment. Microbial toxicity, phytotoxicity, genotoxicity and cytotoxicity were also studied to assess the toxicity level for each treatment. The obtained data suggest that the contribution of more than one mode of treatment is essential to ensure complete destruction of the by-products. The use of gamma irradiation (25 kGy) after the bioremediation step led to the decrease of the by-products of biodegradation as observed by visible spectrum and Fourier transfer infra red spectroscopy (FT-IR). The toxicity assessment presented variable results indicating the need for more than one toxicity test to confirm the presence or absence of hazardous compounds. Brown rot fungus could be used efficiently in the treatment of textile waste water without the risk of obtaining high carcinogenic or genotoxic compounds, especially if combined treatment is employed.

Modification of bacterial cell membrane to accelerate decolorization of textile wastewater effluent using microbial fuel cells: role of gamma radiation

“…MFCs inoculated with gamma-irradiated pre-treated cells did not only show the highest MFC performance, but it also exhibited high decolorization and low toxicity values for the treated wastewater. Enhancing decolorization of real textile wastewater was reported to decrease toxicity (Gomaa, Abdel El Kareem, & Fathey, 2011). Therefore, we can claim that gamma radiation affects bacterial cell permeability as well as induces EPS production as stress response, contributing to release of electrons and/or other metabolites, while EPS acted as the transient media for electron transfer, in addition to the overall increase in cell adhesion to the anodic surface.…”

Degradation of Reactive Black 5 Dye (RB5) using Iron Electrode (Fe.S) Derived from Iron Sludge Steel Waste via Electrochemical Method

“…Example, the research made by Kamaruddin reported that biological treatment such as aerobic and anaerobic were disabled to degrade the azo dyes [4]. This is due to the incomplete destruction of the organic compounds during treatment process that caused the azo dyes being transfer onto biomass [4,13,14]. In addition, advanced oxidation processes (AOPs) like IOP Publishing doi:10.1088/1755-1315/1216/1/012037 2 ozonation, UV-Fenton, and photochemical required continuous chemical supplies (Fenton's reagents) during treatment.…”

Sequential electron beam and bioflocculation for treatment of textile nanodyes

“… 7 Its effect may lead to cytotoxicity and genotoxicity and treating the effluent efficiently can help alleviate this toxicity. 8 The hazardous effect of wastewater re-uses lies in the pathway of their release. Industrial wastewater is collected with household and agriculture drainage water, mixed and then treated for re-use in irrigation.…”