Evaluation of Sugarcane Bagasse as Bio Adsorbent In Textile Wastewater Treatment

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Date

2018-07

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AAU

Abstract

This thesis was conducted for evaluation of sugarcane bagasse as bio adsorbent for removing of textile wastewater colour. The sugarcane bagasse was soaked in hydrochloric acid solution for twenty four hours and finally the sugarcane bagasse was dried in oven to remove moisture. The sugarcane bagasse was characterized according ASTM method for moisture content and ash content as well as according ISO method for volatile matter. The experimental result obtained were 29% for moisture content, 4.2% for ash content and 83% for volatile matter. FTIR analysis of sugarcane bagasse was carried out and the experimental result indicates that the presence of different functional groups on the surface of sugarcane bagasse before and after adsorption. In addition to this XRD analysis of sugarcane bagasse was conducted. The higher peak of XRD analysis indicates crystalline cellulose region and the lower peak indicates amorphous structure. The raw textile wastewater was characterized according APHA method for BOD, COD and TDS before and after adsorption as well as pH before adsorption and the results were for BOD it ranges from 48 mg/L – 163 mg/L before adsorption and from 20 mg/L – 83 mg/L after adsorption and for COD 925 mg/L before adsorption and 50 mg/L after adsorption as well as TDS 10,000 mg/L before adsorption and 8400 mg/L after adsorption. Eventually the pH value before adsorption was 9.65. Adsorption was conducted using synthetic azo dye and textile wastewater at the factors of concentration, Adsorbent, pH and contact time and the higher colour removal was achieved at optimum value of concentration 52.5 mg/L, dose of adsorbent 2.5-gram, pH 6.5 and time 75 minute for both adsorption. Based on ANOVA analysis on adsorption of azo dye and textile wastewater on to bagasse, factors of concentration, pH, and time were significant. Kinetic study was carried out for adsorption of azo dye and textile wastewater and pseudo first order model was well fitted for both adsorptions. In addition to this adsorption isotherm was conducted for azo dye and textile wastewater adsorption and the Langmuir isotherm model was well fitted for both adsorptions. To conclude the comparative analysis of azo dye and textile wastewater adsorption using sugarcane bagasse as bio-adsorbent and the result provide that, there was a higher percentage of colour removal with azo dye adsorption when compared with adsorption of textile wastewater and the results were 90% for azo dye colour removal and 81% for textile wastewater colour removal.

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Keywords

Sugarcane bagasse, azo dye, adsorption process, textile wastewater removal

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