2019_EJRNL_PP_RAHIL_CHANGOTRA_1.pdf
Terbatas Open In Flip Book Lili Sawaludin Mulyadi
» ITB
Terbatas Open In Flip Book Lili Sawaludin Mulyadi
» ITB
The pharmaceutical wastewater of different organic loads i.e. high (HSW) and low strength
wastewater (LSW) were collected from the bulk pharmaceutical industry and subjected to
different applications of Fenton’s treatment followed by subsequent biological treatment. For
both the HSW and LSW, applications of Fenton such as, dark-Fenton (DF), solar driven photoFenton (PF) and electro-Fenton (EF) were utilized as pre-treatment technologies to improve the
biodegradability and reduce the organic load of wastewater by combine oxidation and
coagulation. The operational parameters like pH, hydrogen peroxide dosage and iron
concentration were optimized in case of DF and PF processes, whereas in case of EF process,
applied voltage and hydrogen peroxide dosage were optimized to make water biocompatible for
subsequent biological degradation. The use of Fenton applications as a pre-treatment resulted in
a significant enhancement in the BOD5/COD ratio validating the production of easily degradable
metabolites or secondary products. Overall results indicated that among the utilized Fenton
technologies, pre-treatment of pharmaceutical wastewater with PF lead to better COD and TOC
removal efficiency with subsequent biological degradation when compared to DF and EF pretreatment. Overall COD removal efficiency of the combined PF and biological treatment was
around 84% for LSW and 82% for HSW. Conclusively, it can be established that combined
Fenton applications as pretreatment technology and biological treatment is more effective
approach in comparison to single stage oxidation either by Fenton or biological treatment.
Cytotoxicity assessment revealed that complete detoxification of wastewaters were achieved
indicating that hybrid treatment technology of Fenton’s and biological treatment did not
exhibited any toxicity against the selected microbes.