Enhanced textile wastewater treatment by a novel biofilm carrier with adsorbed nutrients

Publication date: Available online 5 February 2020Source: Biocatalysis and Agricultural BiotechnologyAuthor(s): Jéssica Mulinari, Cristiano José de Andrade, Heloísa de Lima Brandão, Adriano da Silva, Selene Maria de Arruda Guelli Ulson de Souza, Antônio Augusto Ulson de SouzaAbstractThis work aimed to enhance the biodegradation of synthetic textile wastewater using pyrolyzed sludge from an effluent treatment plant of a textile industry as biofilm carrier. The control carrier was compared to a carrier supplemented with nutrients (potassium, phosphorus, nitrogen, calcium, and sulfur) that were sequentially adsorbed. These nutrients are essential for microbial metabolism. First, the decolorization of the azo dye Reactive Red 141 (RR141) was tested and then, the biodegradation of synthetic textile wastewater was analyzed. The microorganisms present in each condition were identified by mass spectrometry. The supplemented carrier enhanced RR141 decolorization 3.6-fold and 1.8-fold when compared to free biomass and control carrier, respectively. The dye biodegradation followed a pseudo-second-order kinetics. The use of the supplemented carrier increased the rate constant 4.3-fold and 13.8-fold in relation to the use of control carrier and free biomass, respectively. For the synthetic textile wastewater, the supplemented carrier enhanced the decolorization 2.9-fold and 1.6-fold compared to free biomass and control carrier, respectively. The decolorization also followed pseudo-se...

Source: Biocatalysis and Agricultural Biotechnology - February 7, 2020 Category: Biotechnology Source Type: research