Treatment of textile effluent containing indigo blue dye by a UASB reactor coupled with pottery clay adsorption

Flavio Bentes Freire,Vinicius Conceição,Karina Querne De Carvalho

doi:10.4025/actascitechnol.v35i1.13091

Flavio Bentes Freire, Vinicius Conceição + Show 1 more

Open Access

https://doi.org/10.4025/actascitechnol.v35i1.13091

Copy DOI

Abstract

This study aimed to evaluate the treatment of a synthetic textile wastewater containing the blue indigo dye in a UASB (upflow anaerobic reactor), on a bench scale, followed by pottery clay adsorption. The system monitoring was verified by the following physical and chemical parameters: pH, alkalinity, volatile acids, COD and removal of color. The adsorption tests using pottery clay (construction debris) as an alternative adsorbent material were performed on a jar test equipment. The results showed satisfactory effectiveness in removing color and organic matter (COD) by the UASB, at the order of 69 and 81.2%, respectively. The color removal using ceramic clay as an alternative adsorbent material was 97% for the concentration of 200 g L-1 of adsorbent, evidencing that the use of pottery clay as adsorbent material had significant and promising results, and may be used as a post-treatment unit for removal of dyes present in textile effluents, and since construction debris currently represents a major environmental problem, its use in wastewater treatment may become an alternative to a proper destination of this waste.

Highlights

The growing concern with the preservation of water resources in the last few years has become evident both by the establishment of environmental standards increasingly restrictive, or by the charges, according to the paying polluter and paying user principles
The composition of the synthetic textile effluent used is presented in the Table 1, with the values based on a concentration of organic material in terms of color and organic matter (COD) in the order of 1,000 mg L-1
For different concentrations of COD from the stipulated, it was added the reactants in the desired proportion

Summary

Introduction

The growing concern with the preservation of water resources in the last few years has become evident both by the establishment of environmental standards increasingly restrictive, or by the charges, according to the paying polluter and paying user principles. Pollution and contamination of the water bodies by different human activities have caused several environmental, social, economic and of public health problems. The textile industries are recognized by the high consumption. Technology of water and generation of hazardous effluents. Management measures related to the improvement of production techniques, which lead to a lower water consumption, and the treatment and reuse of generated effluents, certainly enable a reduction of environmental impacts. The textile industry is one of the largest producers of liquid effluents. 80 liters of water are necessary to produce 1 kg of fabric. There is reference to values in the order of 150 liters, being 80% of this volume discarded as effluent and only 12% of the total composes the losses by evaporation (HARRELKAS et al, 2009)

Objectives

Methods

Results

Conclusion