Published at : 19 Apr 2021
Volume : IJtech
Vol 12, No 2 (2021)
DOI : https://doi.org/10.14716/ijtech.v12i2.4045
Lieke Riadi | 1. Chemical Engineering Department, University of Surabaya,Jl. Raya Kalirungkut, Surabaya 60292, Indonesia 2. Center for Environmental and Renewable Energy Studies, University of Surabaya,Jl.Raya Ka |
Alan Darmasaputra Tanuwijaya | Chemical Engineering Department, University of Surabaya, Jl. Raya Kalirungkut, Surabaya 60292, Indonesia |
Ricky Richard Je | Chemical Engineering Department, University of Surabaya, Jl. Raya Kalirungkut, Surabaya 60292, Indonesia |
Ali Altway | Chemical Engineering Department, Sepuluh Nopember Institut of Technology, Jl. Raya ITS, Keputih, Sukolilo, Surabaya 60111, Indonesia |
Personal care products (PCPs) are considered an
emerging class of pollutants, and PCP wastewater is classified as hazardous because
it contains organic compounds, which are linked to high chemical oxygen demand
(COD) concentrations. PCP wastewater is dangerous when discharged into rivers
without treatment, which entails oxidizing complex organic compounds into simpler
compounds using advanced oxidation technology (AOT). Fenton’s reagent is composed
of Fe2+ and H2O2 and can oxidize organic
compounds, thus reducing COD concentrations. This study aims to determine the
effectiveness of the AOT method by calculating COD removal in wastewater;
analyze the effect of the Fe2+/H2O2 ratio, H2O2
concentration, and system pH; develop a kinetics model of COD reduction;
and analyze the cost of PCP wastewater treatment. The parameters used in the
study are Fe2+/H2O2 ratio, H2O2
concentration, and pH. The results of this study show that the highest
level of COD removal was 88.59% at a Fe2+/H2O2
ratio of 9% w/w, a H2O2 concentration of six times the
COD concentration, and a pH value of 3. The reaction followed pseudo-first-order
reaction kinetics, and the reaction rate constant was 0.021 min?1. At
a flow rate of 15 m3/day, which is applicable in an industrial site,
the required reactor volume in a continuous system is less than that for a batch
system. The required reactor volume for a plug flow reactor and a batch reactor
are 1.625 m3 and 2.25 m3, respectively. The estimated
cost to treat 1 liter of wastewater is IDR 1,385.
COD; Fenton; Operation cost; PCP wastewater
Personal
care products (PCPs) include antimicrobials, cosmetics, body disinfectants, and
other products applied on human skin. An increase in PCP use will increase the
discharge of PCP wastewater, as PCP waste usually comes from human excreta
(sewage), wrongful disposal, leaching from landfill, drain water, and industrial
waste (Archer et al., 2017). PCP
waste is categorized as a micropollutant, and each PCP contains various organic
compounds. The organic compound concentration in PCP wastewater is usually
determined using the chemical oxygen demand (COD) concentration.
PCP waste has recently been detected in drinking water sources at
concentrations of 1 ng/kg to 1 mg/kg of drinking water (Suanon
et al., 2017). PCP waste is toxic and dangerous
Due to its toxicity, PCP wastewater needs to be treated to reduce its
COD content to a specific level (<150 ppm) at which it is safe for discharge
and to comply with the regulations of the East Java regional Province (No. 72, year 2013).
Fenton’s
process is effective for the treatment of PCP industrial wastewater. The
experimental results show that Fenton’s treatment is feasible for the reduction
of COD in PCP wastewater. The COD removal efficiency for PCP industrial
wastewater is influenced by the Fe2+/H2O2
ratio, the H2O2 concentration, and the pH value. The optimal
parameters used in this experiment are a H2O2
concentration of six times the COD concentration, an Fe2+/H2O2
ratio of 9% w/w, and an initial pH value of 3. The initial and final COD
concentrations were 1,054 ppm and 120.28 ppm, respectively, for a 120-min
reaction time, with 88.59% COD removal. The kinetic model follows pseudo-first-order
reaction kinetics, as demonstrated by a high correlation coefficient (R2)
with a reaction rate constant of 0.021 min?1. Based on that model,
the COD removal efficiency is 93.04% after a 130-min reaction time, with an
outlet COD concentration of 73.36 ppm, which is less than 100 ppm and meets the
discharge standard requirements. Regarding
reactor volume, the reactor size required for a PFR is 27.78% less than that
required for a batch reactor for a 130 min reaction time. The operating cost to
treat PCP wastewater in a batch system is IDR 1,385 per liter of wastewater.
Future research may develop the optimal performance of a PFR by studying the
flow rate parameter and conducting a kinetic study of the intermediate
compound. The oxidation can be carried out by dosing the PCP wastewater with H2O2
and FeSO4.7H2O in a tubular reactor.
The
authors would like to acknowledge funding support from VP Industry via Grant
105/VP-01/2018.
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