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Advanced Treatment: Tackling Paracetamol with Fenton Oxidation and Membrane Hybrid Processes Kamal, Fadhila Malahayati; Laksono, Sucipta; Adityosulindro , Sandyanto
Journal of the Civil Engineering Forum Vol. 10 No. 3 (September 2024)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.13031

Abstract

Paracetamol (PCT) in aquatic environments has become a global concern due to its potential harm to humans and environments. However, conventional water treatment was only able to degrade PCT partially. It was necessary to treat PCT contaminated water with tertiary technologies in particular by combination approach, such as Fenton oxidation and membrane filtration process. This combined approach enabling mitigation of large chemical footprint and iron residue associated with Fenton oxidation, as well as reducing fouling tendency of the membrane. The aim of this study was to evaluate the PCT removal efficiency by hybrid technology Fenton oxidation and membrane filtration. The membrane performance during the filtration process was also analyzed. As an important parameter for Fenton process, concentration of H 2 O 2 /Fe 2+ with ratio of 1:0.5 resulted in optimal removal of 45% PCT in terms of COD removal. However, separation using flat sheet Polyethersulfone Ultrafiltration (UF) with constant flux of 120 L/m²·h resulted in insignificant of COD removal. Nevertheless, the UF process was able to remove up to 54% of Fe 2+ at pH in alkaline condition with 8.5. In addition, a decrease in membrane permeability down to 0.2 L/m²h/bar over time, according to the filtered specific volume during the UF process, indicates fouling of the UF membrane during the 120 minutes of filtration. While the combined approach does not show significant improvement in COD removal, it does help to reduce the chemical footprint of the process, which is an important factor for the applicability of the selected water treatment method.
Lab Scale Investigation of Inline Powdered Active Carbon-Ultrafiltration Membrane as Pretreatment for Seawater Reverse Osmosis Laksono, Sucipta; Revansa, Labdaswara Bona; Adityosulindro, Sandyanto
Jurnal Teknologi Lingkungan Vol. 26 No. 1 (2025)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2025.3605

Abstract

Reverse osmosis is a technology to that treat treats seawater as an alternative source for of drinking water supply. Several studies confirmed that pretreatment stages, designed to tackle high salinity and organic material in seawater, contribute significantly to the reliability of SWRO technology. Despite its effectiveness, declination of the performance of SWRO after several operation times resulted in potential improvement. Enhancement of pretreatment process to increase the performance of SWRO is necessary to be investigated. A combination of powdered activated carbon and ultrafiltration (PAC/UF) is employed at a lab scale experiment using real seawater matrix collected from an outlet dissolved air flotation unit as SWRO pretreatment stage. The Experiment was conducted employing a polyethersulfone (PES) membrane with an average pore size of 30 nm at dead-end operation with constant flux of 60 and 120 L/m²·h, respectively. For activated carbon, commercial coconut shell-based PAC was added inside the membrane holder and directly deposited on top of the membrane surface. The experiment was conducted by comparing a single filtration cycle operation using UF with/without activated carbon. UF membrane filtration performance, as well as membrane retention, was observed. PAC/UF resulted in higher removal of organic concentration (UV-Vis) (93-96%) compared to UF (14-43%). Both experiments resulted in high removal up to >90% for turbidity and chemical oxygen demand. Nevertheless, insignificant removal of salts concentration (<5%) was observed. In terms of performance, combined PAC/UF revealed better performance despite a thicker layer in comparison to UF membrane at a similar filtered specific volume of water production. Therefore, a combination PAC/UF at constant flux operation was found to be promising and reliable pretreatment for SWRO. Abstrak Kebutuhan air minum mengalami peningkatan seiring bertambahnya penduduk, tetapi sumber air bersih mengalami penurunan. Hal ini berdampak terhadap pemanfaatan sumber alternatif air laut untuk pemenuhan kebutuhan air minum dengan teknologi reverse osmosis. Walaupun dapat diandalkan untuk mengurangi salinitas tinggi dan kandungan organik air laut, unit pengolahan seawater reverse osmosis (SWRO) mengalami penurunan kinerja setelah pengoperasian dalam kurun waktu tertentu. Salah satu upaya adalah dengan peningkatan proses prapengolahan untuk SWRO. Pada penelitian ini, kombinasi Karbon Aktif Serbuk dan Ultrafiltrasi mempergunakan air laut yang berasal dari outlet unit prapengolahan pada instalasi SWRO. Percobaan filtrasi dilakukan pada percobaan skala laboratorium mempergunakan membran polyethersulfone (PES) dengan ukuran pori 30 nm pada proses dead-end dengan fluks konstan 60 dan 120 L/m²·jam. Karbon aktif bubuk komersial berbahan dasar tempurung kelapa diletakan di atas permukaan membran. Percobaan dilakukan dengan membandingkan operasi siklus filtrasi tunggal menggunakan UF dengan dan tanpa karbon aktif. Parameter pemantauan kualitas air seperti kandungan organik yang dipergunakan antara lain UV-Vis, kekeruhan, kandungan oksigen kimiawi (COD), dan koduktivitas. Penelitian ini menjelaskan bahwa retensi membran PAC/UF menghasilkan penyisihan konsentrasi organik (UV-Vis) yang lebih tinggi (93-96%) dibandingkan dengan hanya mempergunakan UF (14-43%). Untuk kekeruhan dan kebutuhan oksigen kimiawi, kedua percobaan menghasilkan penyisihan yang tinggi hingga >90%. Jika mengacu pada performa filtrasi membran, volume produksi air yang dihasilkan sebanding untuk percobaan hanya dengan UF dan PAC/UF meskipun lapisan PAC/UF lebih tebal. Berdasarkan temuan pada penelitian ini, dapat disimpulkan bahwa kombinasi PAC/UF pada operasi fluks konstan dapat dipergunakan prapengolahan yang dapat diandalkan untuk SWRO.
POROUS MATERIAL ADSORBENTS IN ADVANCES DESIGN CONFIGURATION OF ADSORPTION DESALINATION PROCESS: A REVIEW Kusumadewi, Riana Ayu; Moersidik, Setyo Sarwanto; Laksono, Sucipta; Ali, Firdaus; Putra, Nandy; Budiningsih, Shafira; Luthfiyya, Widi Ajeng
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 1, APRIL 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i1.22613

Abstract

Several desalination systems with distinct operational principles have been developed to enhance the generation of freshwater and optimize system efficiency. Adsorption desalination (AD) systems are highly desirable because to their ability to simultaneously achieve desalination and cooling using minimal energy input. These systems offer significant cost savings in terms of maintenance compared to conventional desalination systems. In order to gain a comprehensive understanding of the fundamental constituents of this desalination technology, the present study initially expounds upon the theory of adsorption and the process of circulation. Aims: The aim of this study is to conduct a thorough analysis of adsorbents for adsorption desalination and adsorption desalination technologies, and investigation into their potential integration with established conventional cycles, including multiple-effect distillation (MED), solar regenerable, and integrated evaporator-condenser cycles. Methodology and results: The findings of this study involve the evaluation and summarization of pertinent research on the fundamental aspects of the adsorption desalination system. These aspects include the thermodynamic process and cycle, performance assessment, adsorbents, and adsorption desalination technologies. The location, heat energy supply, collector, evaporator, condenser, adsorption desalination, adsorbent materials, and findings are investigated. Conclusion, significance and impact study: The discourse pertaining to prospective avenues of research, which will prove beneficial for analogous investigations within this domain, reaches a culmination.