Optimization studies on turbidity removal from cosmetics wastewater using aluminum sulfate and blends of fishbone

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Abstract

This research is centered on the optimization of coagulation–flocculation treatment of cosmetic wastewater. It analyzes blends of fishbone (BFB) and aluminum-based coagulant (ABC) to determine the efficacy of BFB as a potential coagulant–flocculants aid at optimum conditions using response surface methodology (RSM). The experiment was carried out employing the standard nephelometric procedure at 1000 rpm stirring rate. The central composite design (CCD) was used to examine the interactions of pH, dosage, and settling time to maximize the turbidity removal efficiency of the ABC- and BFB-driven coag–flocculation. The optimal pH, dosage, and settling time for ABC were obtained as 10, 0.1 g/L, and 2 min, while pH 6, 0.4 g/L, and settling time of 4 min were recorded for BFB following the established quadratic model of the RSM. The removal efficiency of ABC and BFB plots 80% and 88%, respectively; this corresponds to 262 NTU and 288 NTU of removal from the wastewater at optimal conditions. The kinetics result indicated that the rate constant (Kf) 3 × 10−3 (L/g min) of BFB surpassed 5 × 10−5 (L/g min) recorded for ABC following second-order coag–flocculation reaction, with correlation coefficients (R2) values of 0.999 and 0.9985, respectively. The research also applied cost–benefit analysis for the determination of the efficacy of BFB. The figure obtained shows that the benefit of using BFB will save $5.50 compared to ABC based on this work. At optimal conditions, BFB satisfied the environmental protection agency pH standard for industrial wastewater discharge, promising coagulant–flocculants aid for industrial wastewater purification purpose and the preservation of the environment.

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APA

Ovuoraye, P. E., Ugonabo, V. I., & Nwokocha, G. F. (2021). Optimization studies on turbidity removal from cosmetics wastewater using aluminum sulfate and blends of fishbone. SN Applied Sciences, 3(4). https://doi.org/10.1007/s42452-021-04458-y

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