VALORIZATION OF TYPHA LATIFOLIA L. POST-PHYTOREMEDIATION OF NICKEL IN ELECTROPLATING WASTEWATER INTO REDUCING SUGAR HYDROLYSATE VIA ENZYMATIC HYDROLYSIS USING ASPERGILLUS NIGER

• Main Author: Antonia Sidabutar, Naomi
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/76404
• Institution: Institut Teknologi Bandung

The development of the metal industry in Indonesia has a positive impact on the economy but brings pollution of toxic substances from wastewater into the environment. Phytoremediation is a technology that can be utilized as an alternative to conventional methods to remediate electroplating wastewater by using plants as phytoremediator agents. This study aims to evaluate the tolerance and ability of Typha latifolia in remediating nickel (Ni) metal from electroplating wastewater, as well as producing reducing sugar hydrolysate from phytoremediated biomass via enzymatic hydrolysis with Aspergillus niger. Phytoremediation was conducted on electroplating effluent with Ni concentration of 385 ppm, 1100 ppm, and control. Phytoremediation performance was evaluated from the parameters of removal percentage (%removal), BOD, COD, bioconcentration factor (BCF), and translocation factor (TF). The highest %removal found is 99.99% using 1100 ppm Ni, with Ni accumulation in shoots and roots 11.36 and 47.67 mg/kg respectively. The reduction in BOD and COD levels of electroplating wastewater was found to be 67.16% and 66.67%. On all treatments, BCF<1 and TF<1 values were found, indicating suboptimal accumulation and translocation of Ni metal in plants suspected due to highly concentrated wastewater. Positive relative growth rate (RGR) values with growth inhibition were found as indication of tolerance to Ni metal stress. Reducing sugar yield from hydrolysates are found to be 0,250 and 0,262 mg/g dry weight of biomass substrate, respectively. No significant difference was found after enzymatic hydrolysis due to high increase in lignin content and decrease in cellulose and hemicellulose which caused inhibition for A. niger enzymatic hydrolysis activity.