Combination of activated allophane-effective microorganisms for bioremediation of iron and manganese on pharmaceutical industry wastewater
C A Dharmawan, Cari, Pranoto and P Setyono
Published under license by IOP Publishing Ltd
IOP Conference Series: Earth and Environmental Science, Volume 200, conference 1
Climate change has become a crucial problem for the water resources of the pharmaceutical industry in Wonogiri district, Central Java, Indonesia, as the industry uses surface water of several adjacent rivers for its processes and results in high Fe and Mn concentration in its wastewater. Iron and manganese in pharmaceutical industry wastewater should be reduced to 1.0 and 0.5 ppm to implement the Indonesian Ministry of Environment Law No 5 of 2014. The study aims to evaluate the effectiveness of combined activated allophane adsorption and biofiltration of Effective Microorganisms 4 (EM4) for reducing Fe and Mn concentrations in pharmaceutical industry wastewater. Allophane of Lawu volcano, Central Java, Indonesia is activated using NaOH and the EM4 is attached to bio ball media. Bio balls were seeded with 2 ml EM4, inserted into allophane tube, then submerged into the wastewater from a herbal Pharmaceutical industry in Wonogiri district, Central Java on November 2017. The combined of bioreactor system operated in aerobic batch condition. The bioreactors were set for 0, 6, 12, 18, 24 hours at 28, 32, 37 and 46 °C. The analysis of iron used o’phenanthroline method and manganese was examined using Persulfate method. The results showed a decrease from 0.591 to 0.175 ppm of iron, and manganese from 0.721 to 0.441 ppm at 37 °C for 24 hours.