Evaluation of Fenton Process as Treatment Method for Paint Wastewater: A Case Study

Author : Pumar, Emson Mari Isleta
Major Adviser : Capunitan, Jewel A.
Committee Members : Carpio, Rowena B.; Migo, Veronica P.
Year : 2020
Month : July
Type : Thesis
Degree: BS
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In this study, evaluation of Fenton process from the results of several studies was done to find out its applicability as a treatment method for paint wastewater. The Fenton process and its different types, limitations and challenges, and advantages were discussed. From this, recommendations on prospective research direction were made. Literature data shows that paint wastewater characteristics has pH of 7 to 8, total suspended solids (TSS) of 1,000 to 10,000 mg/L, and chemical oxygen demand (COD) of 16,000 to 26,000 mg/L. pH, hydrogen peroxide (H2O2) concentration, ferrous ion (Fe2+) dosage, and catalyst dosage were found to play a huge factor in these processes. Classical Fenton types yielded nearly 80% COD removal efficiency. However, the enhanced types were found to be more efficient ± photo-Fenton (80-100%) and electro-Fenton (99%). Also, using pyrite and schwertmannite catalysts can result to 96 to 98% decolorization of paint effluents. In addition, combinations of these types and with other oxidation processes, such as coagulation, also produces more favorable removal efficiencies (>96%). Nevertheless, some drawbacks of these processes include excessive sludge production, limited workable pH range, and generation of highly concentrated anions and sediments in the treated effluent. Due to these limitations, the prospective research areas for Fenton method can still extend to some range, including reagent optimization and utilization of different catalysts. Based from the evaluation, it can be considered that the Fenton process is effective as a treatment method for paint wastewater.

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